The Rapid Decline of Diesel Choice in the U.K. Market
The U.K. diesel car market is undergoing a dramatic transformation. According to recent research from CarGurus, the number of new diesel models offered by the country’s top 30 car manufacturers has fallen sharply — from 167 in 2020 to just 57 in 2025. This represents a staggering 66% decline in availability over five years, reflecting both changing consumer preferences and the industry’s shift toward alternative powertrains.
Dacia is among the latest brands to withdraw from diesel entirely, contributing to an overall 12% year-on-year reduction in diesel offerings. Today, only 13 of the U.K.’s 30 most popular manufacturers continue to offer diesel vehicles, compared to 28 just five years ago.
A Long Road of Decline
Diesel was once a dominant choice for U.K. motorists, with availability climbing steadily through the 2000s. From 123 models in 2005, the number of new diesel cars increased to 191 in 2010, eventually peaking at 202 around 2015. However, since that high point, the market has contracted sharply, and demand has continued to drop.
SMMT data illustrates the trend clearly: diesel registrations fell from nearly 1.3 million in 2015 to just 123,104 in 2024. Factors such as environmental regulations, urban low-emission zones, and a shift toward electric and hybrid vehicles have reshaped consumer behaviour, making diesel less attractive to new-car buyers.
Leaders in a Shrinking Market
Despite the overall decline, certain brands continue to invest in diesel technology. Mercedes-Benz leads the market with 16 diesel models, up from 13 last year, thanks in part to the growing inclusion of diesel plug-in hybrids (PHEVs). Citroën has also introduced refreshed diesel engines, signalling ongoing commitment to cleaner diesel options.
Other manufacturers have scaled back significantly. Brands such as Ford, Vauxhall, Toyota, Nissan, Honda, and Hyundai now offer little to no diesel models in the U.K., reflecting both market exit and a strategic pivot to electrification.
Used Diesel as a Lifeline
For buyers still seeking diesel vehicles, the shrinking new-car market means the used-car market has become an increasingly important resource. CarGurus’ platform enables users to filter by fuel type and ULEZ compliance, making it easier to locate approved diesel models that meet environmental regulations while offering high mileage efficiency and towing capability.
Chris Knapman, CarGurus U.K. Editorial Director, notes:
“While diesel is no longer the default choice, there remains strong demand in specific segments, particularly among high-mileage drivers and those needing towing capacity or long-range efficiency. The used market continues to offer a broad range of diesel models, many of which are ULEZ-compliant. For new car buyers, brands like Mercedes are pairing diesel with plug-in hybrid technology to offer added efficiency and compliance.”
CarGurus also provides expert guidance for buyers navigating the diesel market, including curated lists of the best ULEZ-compliant diesel and diesel-hybrid cars, helping shoppers make informed decisions in a rapidly evolving landscape.
The Outlook for Diesel in the U.K.
The decline in diesel choice signals a broader automotive industry transition. While diesel will remain relevant for certain drivers, the overall trend points firmly toward electrification, hybrids, and stricter emissions compliance. Buyers seeking diesel vehicles must increasingly look to used models or niche new offerings from brands that continue to innovate in cleaner diesel technology.
For U.K. drivers, understanding these trends is critical. Platforms like CarGurus not only provide access to the remaining diesel options but also offer tools to compare efficiency, compliance, and performance, ensuring buyers can still find the diesel model that best fits their needs — even as the market evolves.
