Avoid These 7 Engines In 2026 - One Is In UK's BEST SELLING Cars

Thinking of buying a used car in the UK? These seven problematic engines and powertrains could leave you facing repair bills worth more than the car itself. In this documentary, we investigate some of the most unreliable engines still appearing regularly in UK workshops in 2026—including one fitted to some of Britain’s best-selling cars. From timing-chain failures and deteriorating wet belts to excessive oil consumption, carbon buildup and costly CVT problems, these are the warning signs every used-car buyer should know. The seven problem powertrains covered include: • BMW N47 2.0-litre diesel • Early Volkswagen Group 1.4 TSI • Early Ford 1.0 EcoBoost “wet belt” engine • Vauxhall 2.0 CDTi diesel • PSA/BMW 1.6 THP Prince engine • Early Audi 2.0 TFSI • Nissan models fitted with problematic Xtronic CVTs We explain which cars use these engines, their common reliability problems, the symptoms to watch for and how much the resulting repairs could cost. You’ll also learn why service history, correct engine oil, cold-start checks and specialist inspections are essential before buying a used BMW, Ford, Volkswagen, Audi, Vauxhall, Peugeot, Citroën, MINI or Nissan. If you are considering a used Ford Fiesta, Ford Focus, Ford Puma, BMW 1 Series, BMW 3 Series, Volkswagen Golf, Audi A3, Peugeot, MINI, Nissan Qashqai or Nissan X-Trail, watch this before spending your money. Have you owned a car powered by one of these engines? Share your experience—and your repair bill—in the comments. Subscribe to The Motor Report for more UK car-buying advice, reliability investigations and consumer-warning documentaries. Disclaimer: This video provides general information based on reported faults and workshop experience. Reliability varies according to model year, engine version, mileage, maintenance and previous ownership. Always obtain an independent mechanical inspection before purchasing a used vehicle. #enginefailure #UsedCarsUK #ukcars #usedcars