6,112 Diesel cars under £40000 for sale

Hey there!

Our new heyAI search is still learning, and getting smarter everyday to bring you exactly what you're looking for.

For best results, try using clear, specific phrases like this:

• Make and model (VW Golf GTI)
• Colour and body type (e.g. SUV, hatchback)
• Fuel type (petrol, diesel, electric, hybrid)
• Age of the vehicle (less than 3 years old)
• Mileage (less than 10k miles)
• Your budget (total/monthly)

We're constantly improving to make your car search easier. Thanks for your patience!