Used diesel values have dropped by more than 10% since 2017, as demand shifts towards petrol models.
Over a million vehicles have failed MOT tests since the introduction of new test criteria by the DVSA in May, 2018.
Instant car buying websites are “quoting unrealistically high car valuations online to attract customers” and chipping the price, according to Motorway.co.uk research.
The average price of a used petrol car rose by almost 10% during 2017, but the average price of a used diesel car fell 5%, says Motorway.co.uk.
Cap HPI has responded to reports that diesel car values had seen residual value drops of as much as 26% since the start of the year - claiming that the figure amounted to "harmful scarmongering".
A trio of serial new start-up specialists have launched Motorway.co.uk, the UK’s first price comparison service to help motorists get the best price for their used car.
Automotive Management Live: Where franchised and independent dealers will find everything they need to know about operating a modern showroom and service and repair facility fit for the digital age.
When: November 7 2019
Where: Birmingham NEC
Find out what features are in this month's, and future, issues