Contents
What is happening with the diesel market in Spain
The three forces pushing diesel prices down
How much is a second-hand diesel worth in 2026
Which diesels sell well and which do not
Is it worth waiting to sell?
How to get the best price for your diesel
Where to sell a diesel car
Frequently Asked Questions
If you own a diesel car and are thinking about selling it "later on", there is something you should know: with each passing month, your car is worth less. Not just because of the normal depreciation that affects all used cars, but due to an additional pressure that is specific to diesel and that is not going to reverse.
Low Emission Zones are progressively restricting access for older diesels to cities. The EU is moving towards taxing diesel at the same level as petrol, which eliminates the fuel price advantage. And the demand for hybrids and electrics is growing every quarter, displacing diesel as the preferred option in the second-hand market.
None of this means that your diesel car has no value today. It means that the value it has today is probably the highest it is going to have. And waiting is not going to make things better.
What is happening with the diesel market in Spain
In the first quarter of 2026, second-hand car sales in Spain accumulated more than 538,000 units. Petrol and diesel vehicles still account for around 79% of used car sales. In other words, diesel has not disappeared from the second-hand market. But its share has been in constant decline since 2019, and the trend is accelerating.
What has changed is not the existence of diesel buyers (they still exist), but their profile. The second-hand diesel buyer in 2026 is someone who does consecutive motorway miles (sales reps, hauliers, people with long daily commutes), who lives outside LEZ zones, or who is looking for a cheap car and diesel gives them access to higher-class models at a reduced price.
What has disappeared is the urban buyer who previously preferred diesel to save on fuel. With diesel at nearly 1.95 euros per litre in May 2026 and the difference with petrol practically eliminated, the economic advantage of diesel has evaporated for urban use. And with LEZs restricting access to city centres, the urban buyer is looking directly at petrol, hybrid, or electric.
The three forces pushing diesel prices down
1. Low Emission Zones (LEZs)
LEZs are already active in Madrid, Barcelona, Valencia, Seville, Malaga, Zaragoza, and dozens of other Spanish cities. Each has its own timetable, but all point in the same direction: progressively restricting access for the most polluting vehicles.
The most affected diesels are those prior to 2006 (without an environmental badge), which can no longer drive through many LEZs. But diesels with a B label (2006-2014) are also in the crosshairs: several cities have announced that restrictions will be extended to this category in the coming years. In Malaga, for example, non-resident B-labelled cars will be restricted starting in November 2026.
Each new restriction reduces the number of potential buyers and, with it, the price. A diesel without a badge that sold for 5,000 euros in 2022 might be worth 3,000 today. And in two years, even less.
2. Petrol-diesel tax alignment
The tax advantage of diesel (lower taxes per litre than petrol) is progressively being reduced by European directive. The EU has been working for years to equalise the taxation of both fuels, eliminating the advantage that made diesel a cheaper option in terms of cost per mile.
In 2026, the average price of diesel A in Spain is 1.916 euros per litre, already very close to that of petrol. For the buyer, the saving difference between diesel and petrol no longer justifies the disadvantages of diesel (restrictions, higher maintenance costs, poorer environmental image).
3. The rise of hybrids and electrics
The supply of hybrids in the second-hand market has grown significantly. Hybrid cars with the ECO label offer advantages that diesel cannot match: unrestricted access to all LEZs, fuel savings (especially in town), discounts on road tax (IVTM) and parking in many cities, and a better environmental perception.
Every hybrid or electric car entering the second-hand market is a direct competitor to diesel. And the supply of both is only going to grow in the coming years, as the new hybrid and electric cars sold since 2020 start reaching the used market in volume.
How much is a second-hand diesel worth in 2026
The value depends on age, mileage and, above all, the environmental badge.
Diesel with label C (post-2014). They hold their value reasonably well, because they can drive without restrictions in all current LEZs. Depreciation is similar to that of an equivalent petrol car, with a slight discount (2-5%) due to the overall negative perception of diesel. A 2020 Peugeot 3008 1.5 BlueHDi with 50,000 km can be worth between 17,000 and 20,000 euros.
If your diesel has a C label, the strategies are the same. Check our guide on how to get the best price for your car.
Diesel with label B (2006-2014). This is where the real pressure starts. These cars can drive today in most LEZs, but the restrictions announced for the coming years create uncertainty. Buyers view them with caution. Depreciation is 5-10% faster than that of an equivalent petrol car. A 2012 Volkswagen Golf 1.6 TDI with 120,000 km can be worth between 6,000 and 8,000 euros.
Diesel without a badge (pre-2006). These are the hardest hit. In cities with LEZs, demand has fallen drastically. In rural areas or those without restrictions, they still sell, but at increasingly lower prices. A 2004 Seat Leon 1.9 TDI with 200,000 km can be worth between 1,500 and 3,000 euros, depending on condition and region.
For a complete reference on the factors that affect value, check how to find out how much your car is worth.
The most reliable way to find out the current value of your diesel is to value it for free with Dealcar. Dealer offers reflect the real market price today, not a theoretical estimate that may be out of date.
Which diesels sell well and which do not
They sell well:
Diesels with a C label and low mileage (less than 80,000 km)
Diesel SUVs (Peugeot 3008, Hyundai Tucson, Seat Ateca) with high commercial demand
Diesels from brands with a good reputation for reliability (Toyota, Volkswagen, Skoda)
Diesel vans (stable demand due to commercial use)
Diesels in rural areas or without LEZs
They sell poorly:
Diesels without a badge in cities with LEZs
Diesels with a B label in cities where restrictions are announced for this category
Mid-range diesel saloons (a segment in general decline)
Diesels with high mileage (over 200,000 km) and without service history
Diesels from brands with less demand (Citroën, Fiat, Opel in low-end ranges)
Is it worth waiting to sell?
No. And this is not an opinion: it is an economic calculation.
Diesel depreciation accelerates every year. As LEZs expand, demand drops and prices fall. A B-labelled diesel can lose between 8% and 12% of its value per year (compared to the usual 5-7% for an equivalent petrol car). On an 8,000 euro car, that is between 640 and 960 euros of annual loss just from accelerated depreciation.
Restrictions are only going to increase. No LEZ is going to ease its restrictions. The European schedule points to increasingly severe restrictions for combustion vehicles. Each announcement of a new restriction pushes the price a little further down.
The buyer market is shrinking. Every buyer who opts for a hybrid instead of a diesel is one less buyer for your car. And the supply of hybrids in the second-hand market is growing every quarter.
The cost of maintaining a diesel rises with age. Particulate filter (DPF), injectors, turbo, EGR. Diesel-specific repairs are expensive, and as the car ages, the likelihood of needing them increases. Any repair you have to carry out reduces your net profit from the sale.
The conclusion is clear: if you have already decided that you are going to sell your diesel, the best time is now. Not tomorrow, not next month, not when "the market goes up" (it won't). Today's price is probably the highest you are going to get.
How to get the best price for your diesel
If your diesel has a C label, the sales strategies are the same as for any other car. Check our guide on how to get the best price for your car.
If your diesel has a B label or no label at all, there are specific strategies.
Widen the geographical market. Your ideal buyer may not be in your city. A diesel without a badge that has no market in Madrid might be exactly what a buyer in a rural area of Castilla-La Mancha or Extremadura is looking for. Platforms that connect with buyers across Spain (such as Dealcar) are particularly useful for this type of car.
Highlight what diesel does well. If your car has excellent motorway fuel economy, documented mileage proving reliability, or an engine with a solid reputation (Volkswagen TDIs, Peugeot BlueHDis, Toyota D4Ds), highlight it. There are buyers who still value these features.
Be transparent about the limitations. Do not hide the label or the LEZ restrictions. An informed buyer will find out and feel misled. It is better to be direct: "the car has a B label, it can currently drive in most LEZs but there are announced restrictions. The price already reflects this situation."
Do not wait for the ITV (MOT) to expire. Passing the ITV before selling is especially important for old diesels, because buyers know that diesels with high mileage are more likely to fail the inspection (particulate filter, emissions). A recently passed ITV eliminates that objection.
Where to sell a diesel car
Classified sites. They work, but diesels with a B label or no label take longer to sell than equivalent petrol cars. Be prepared for more time and more haggling. Check our guides on selling on Wallapop and selling on Coches.net.
Instant car buying services. Compramostucoche, Flexicar and the like buy diesels, but offers for low-label diesels can be especially conservative, because the company knows it will struggle to resell it.
Offers for low-label diesels can be conservative. Check what you should know before accepting an instant purchase offer.
Dealer auction platforms. This is the best option for B-labelled or non-labelled diesels, because the car reaches dealerships all over Spain, including those operating in non-LEZ areas that have real demand for these vehicles. With Dealcar, a dealer in Extremadura or a rural area can bid on your diesel that nobody wants in Madrid. Competition between buyers from different regions is what keeps the price up.
Dealcar: value your car for free and receive offers from dealers
Your diesel still has value. But to know exactly how much, you need real offers from buyers who know the current market. With Dealcar, you can value your car for free in less than 30 seconds and receive offers from more than 1,000 dealers across Spain.
Dealers operating in non-LEZ areas have real demand for diesel and bid accordingly. You are not limited to your city's market: your car reaches buyers nationwide.
100% free for you. No commissions or hidden costs.
Get paid before handing over the keys. Bank transfer before delivering the car.
Hassle-free collection at your home. No travelling required.
No paperwork. The buyer handles the transfer, DGT, and all paperwork.
On average, 1,400 euros more than selling on Wallapop.
More than 12,000 cars sold and an average rating of 4.9 out of 5.
Do not wait for your diesel to lose more value. Value it for free today.
Frequently Asked Questions
Will diesel cars be worth less and less?
For B-labelled or non-labelled diesels, yes. The expansion of LEZs, tax alignment, and the rise of hybrids continually push their price down. Diesels with a C label depreciate at a rate more similar to an equivalent petrol car, but they are also affected by the overall negative perception of diesel.
When is the worst time to sell a diesel?
Each month that passes is worse than the last, especially for B-labelled or non-labelled diesels. There is no "good future time" to sell a diesel: today's price is the highest you are going to get.
Does a dealership buy diesels without a badge?
Yes. Professional dealerships buy all types of vehicles, including diesels without badges. Many operate in non-LEZ areas where these cars are in demand. The price will be lower than for a car with a badge, but you will receive an offer reflecting the real market.
Is it better to sell my diesel or wait for the Renove scrappage scheme?
If there is a Renove scheme active with direct help to scrap your car and buy a new one, it may be worth taking advantage of it. But the help from the Renove scheme is applied to the purchase of the new car, not to the value of your diesel. If you can sell your diesel on the market for more than they give you as scrappage aid, sell it first and then buy the new one.
What label does my diesel need to drive without restrictions?
The C label (diesels registered after September 2015) allows driving in all current LEZs without restriction. The B label (diesels 2006-2015) allows driving in most LEZs today, but there are cities announcing restrictions for this category in the coming years. Without a label (diesels prior to 2006), restrictions are already a reality in many cities.
Contents
What is happening with the diesel market in Spain
The three forces pushing diesel prices down
How much is a second-hand diesel worth in 2026
Which diesels sell well and which do not
Is it worth waiting to sell?
How to get the best price for your diesel
Where to sell a diesel car
Frequently Asked Questions
If you own a diesel car and are thinking about selling it "later on", there is something you should know: with each passing month, your car is worth less. Not just because of the normal depreciation that affects all used cars, but due to an additional pressure that is specific to diesel and that is not going to reverse.
Low Emission Zones are progressively restricting access for older diesels to cities. The EU is moving towards taxing diesel at the same level as petrol, which eliminates the fuel price advantage. And the demand for hybrids and electrics is growing every quarter, displacing diesel as the preferred option in the second-hand market.
None of this means that your diesel car has no value today. It means that the value it has today is probably the highest it is going to have. And waiting is not going to make things better.
What is happening with the diesel market in Spain
In the first quarter of 2026, second-hand car sales in Spain accumulated more than 538,000 units. Petrol and diesel vehicles still account for around 79% of used car sales. In other words, diesel has not disappeared from the second-hand market. But its share has been in constant decline since 2019, and the trend is accelerating.
What has changed is not the existence of diesel buyers (they still exist), but their profile. The second-hand diesel buyer in 2026 is someone who does consecutive motorway miles (sales reps, hauliers, people with long daily commutes), who lives outside LEZ zones, or who is looking for a cheap car and diesel gives them access to higher-class models at a reduced price.
What has disappeared is the urban buyer who previously preferred diesel to save on fuel. With diesel at nearly 1.95 euros per litre in May 2026 and the difference with petrol practically eliminated, the economic advantage of diesel has evaporated for urban use. And with LEZs restricting access to city centres, the urban buyer is looking directly at petrol, hybrid, or electric.
The three forces pushing diesel prices down
1. Low Emission Zones (LEZs)
LEZs are already active in Madrid, Barcelona, Valencia, Seville, Malaga, Zaragoza, and dozens of other Spanish cities. Each has its own timetable, but all point in the same direction: progressively restricting access for the most polluting vehicles.
The most affected diesels are those prior to 2006 (without an environmental badge), which can no longer drive through many LEZs. But diesels with a B label (2006-2014) are also in the crosshairs: several cities have announced that restrictions will be extended to this category in the coming years. In Malaga, for example, non-resident B-labelled cars will be restricted starting in November 2026.
Each new restriction reduces the number of potential buyers and, with it, the price. A diesel without a badge that sold for 5,000 euros in 2022 might be worth 3,000 today. And in two years, even less.
2. Petrol-diesel tax alignment
The tax advantage of diesel (lower taxes per litre than petrol) is progressively being reduced by European directive. The EU has been working for years to equalise the taxation of both fuels, eliminating the advantage that made diesel a cheaper option in terms of cost per mile.
In 2026, the average price of diesel A in Spain is 1.916 euros per litre, already very close to that of petrol. For the buyer, the saving difference between diesel and petrol no longer justifies the disadvantages of diesel (restrictions, higher maintenance costs, poorer environmental image).
3. The rise of hybrids and electrics
The supply of hybrids in the second-hand market has grown significantly. Hybrid cars with the ECO label offer advantages that diesel cannot match: unrestricted access to all LEZs, fuel savings (especially in town), discounts on road tax (IVTM) and parking in many cities, and a better environmental perception.
Every hybrid or electric car entering the second-hand market is a direct competitor to diesel. And the supply of both is only going to grow in the coming years, as the new hybrid and electric cars sold since 2020 start reaching the used market in volume.
How much is a second-hand diesel worth in 2026
The value depends on age, mileage and, above all, the environmental badge.
Diesel with label C (post-2014). They hold their value reasonably well, because they can drive without restrictions in all current LEZs. Depreciation is similar to that of an equivalent petrol car, with a slight discount (2-5%) due to the overall negative perception of diesel. A 2020 Peugeot 3008 1.5 BlueHDi with 50,000 km can be worth between 17,000 and 20,000 euros.
If your diesel has a C label, the strategies are the same. Check our guide on how to get the best price for your car.
Diesel with label B (2006-2014). This is where the real pressure starts. These cars can drive today in most LEZs, but the restrictions announced for the coming years create uncertainty. Buyers view them with caution. Depreciation is 5-10% faster than that of an equivalent petrol car. A 2012 Volkswagen Golf 1.6 TDI with 120,000 km can be worth between 6,000 and 8,000 euros.
Diesel without a badge (pre-2006). These are the hardest hit. In cities with LEZs, demand has fallen drastically. In rural areas or those without restrictions, they still sell, but at increasingly lower prices. A 2004 Seat Leon 1.9 TDI with 200,000 km can be worth between 1,500 and 3,000 euros, depending on condition and region.
For a complete reference on the factors that affect value, check how to find out how much your car is worth.
The most reliable way to find out the current value of your diesel is to value it for free with Dealcar. Dealer offers reflect the real market price today, not a theoretical estimate that may be out of date.
Which diesels sell well and which do not
They sell well:
Diesels with a C label and low mileage (less than 80,000 km)
Diesel SUVs (Peugeot 3008, Hyundai Tucson, Seat Ateca) with high commercial demand
Diesels from brands with a good reputation for reliability (Toyota, Volkswagen, Skoda)
Diesel vans (stable demand due to commercial use)
Diesels in rural areas or without LEZs
They sell poorly:
Diesels without a badge in cities with LEZs
Diesels with a B label in cities where restrictions are announced for this category
Mid-range diesel saloons (a segment in general decline)
Diesels with high mileage (over 200,000 km) and without service history
Diesels from brands with less demand (Citroën, Fiat, Opel in low-end ranges)
Is it worth waiting to sell?
No. And this is not an opinion: it is an economic calculation.
Diesel depreciation accelerates every year. As LEZs expand, demand drops and prices fall. A B-labelled diesel can lose between 8% and 12% of its value per year (compared to the usual 5-7% for an equivalent petrol car). On an 8,000 euro car, that is between 640 and 960 euros of annual loss just from accelerated depreciation.
Restrictions are only going to increase. No LEZ is going to ease its restrictions. The European schedule points to increasingly severe restrictions for combustion vehicles. Each announcement of a new restriction pushes the price a little further down.
The buyer market is shrinking. Every buyer who opts for a hybrid instead of a diesel is one less buyer for your car. And the supply of hybrids in the second-hand market is growing every quarter.
The cost of maintaining a diesel rises with age. Particulate filter (DPF), injectors, turbo, EGR. Diesel-specific repairs are expensive, and as the car ages, the likelihood of needing them increases. Any repair you have to carry out reduces your net profit from the sale.
The conclusion is clear: if you have already decided that you are going to sell your diesel, the best time is now. Not tomorrow, not next month, not when "the market goes up" (it won't). Today's price is probably the highest you are going to get.
How to get the best price for your diesel
If your diesel has a C label, the sales strategies are the same as for any other car. Check our guide on how to get the best price for your car.
If your diesel has a B label or no label at all, there are specific strategies.
Widen the geographical market. Your ideal buyer may not be in your city. A diesel without a badge that has no market in Madrid might be exactly what a buyer in a rural area of Castilla-La Mancha or Extremadura is looking for. Platforms that connect with buyers across Spain (such as Dealcar) are particularly useful for this type of car.
Highlight what diesel does well. If your car has excellent motorway fuel economy, documented mileage proving reliability, or an engine with a solid reputation (Volkswagen TDIs, Peugeot BlueHDis, Toyota D4Ds), highlight it. There are buyers who still value these features.
Be transparent about the limitations. Do not hide the label or the LEZ restrictions. An informed buyer will find out and feel misled. It is better to be direct: "the car has a B label, it can currently drive in most LEZs but there are announced restrictions. The price already reflects this situation."
Do not wait for the ITV (MOT) to expire. Passing the ITV before selling is especially important for old diesels, because buyers know that diesels with high mileage are more likely to fail the inspection (particulate filter, emissions). A recently passed ITV eliminates that objection.
Where to sell a diesel car
Classified sites. They work, but diesels with a B label or no label take longer to sell than equivalent petrol cars. Be prepared for more time and more haggling. Check our guides on selling on Wallapop and selling on Coches.net.
Instant car buying services. Compramostucoche, Flexicar and the like buy diesels, but offers for low-label diesels can be especially conservative, because the company knows it will struggle to resell it.
Offers for low-label diesels can be conservative. Check what you should know before accepting an instant purchase offer.
Dealer auction platforms. This is the best option for B-labelled or non-labelled diesels, because the car reaches dealerships all over Spain, including those operating in non-LEZ areas that have real demand for these vehicles. With Dealcar, a dealer in Extremadura or a rural area can bid on your diesel that nobody wants in Madrid. Competition between buyers from different regions is what keeps the price up.
Dealcar: value your car for free and receive offers from dealers
Your diesel still has value. But to know exactly how much, you need real offers from buyers who know the current market. With Dealcar, you can value your car for free in less than 30 seconds and receive offers from more than 1,000 dealers across Spain.
Dealers operating in non-LEZ areas have real demand for diesel and bid accordingly. You are not limited to your city's market: your car reaches buyers nationwide.
100% free for you. No commissions or hidden costs.
Get paid before handing over the keys. Bank transfer before delivering the car.
Hassle-free collection at your home. No travelling required.
No paperwork. The buyer handles the transfer, DGT, and all paperwork.
On average, 1,400 euros more than selling on Wallapop.
More than 12,000 cars sold and an average rating of 4.9 out of 5.
Do not wait for your diesel to lose more value. Value it for free today.
Frequently Asked Questions
Will diesel cars be worth less and less?
For B-labelled or non-labelled diesels, yes. The expansion of LEZs, tax alignment, and the rise of hybrids continually push their price down. Diesels with a C label depreciate at a rate more similar to an equivalent petrol car, but they are also affected by the overall negative perception of diesel.
When is the worst time to sell a diesel?
Each month that passes is worse than the last, especially for B-labelled or non-labelled diesels. There is no "good future time" to sell a diesel: today's price is the highest you are going to get.
Does a dealership buy diesels without a badge?
Yes. Professional dealerships buy all types of vehicles, including diesels without badges. Many operate in non-LEZ areas where these cars are in demand. The price will be lower than for a car with a badge, but you will receive an offer reflecting the real market.
Is it better to sell my diesel or wait for the Renove scrappage scheme?
If there is a Renove scheme active with direct help to scrap your car and buy a new one, it may be worth taking advantage of it. But the help from the Renove scheme is applied to the purchase of the new car, not to the value of your diesel. If you can sell your diesel on the market for more than they give you as scrappage aid, sell it first and then buy the new one.
What label does my diesel need to drive without restrictions?
The C label (diesels registered after September 2015) allows driving in all current LEZs without restriction. The B label (diesels 2006-2015) allows driving in most LEZs today, but there are cities announcing restrictions for this category in the coming years. Without a label (diesels prior to 2006), restrictions are already a reality in many cities.
