The diesel Suzuki SX4 2011 earned the dubious honor of being the corrosion champion: defects related to rust were found in over 71% of cases during UK MoT tests.

Second place goes to the diesel Dacia Duster 2013 with a rate of 67.33%. Rounding out the top three is the same diesel Suzuki SX4, but now the 2012 model year, with 64.71% of tested cars showing corrosion issues.

At the opposite end of the spectrum sits the petrol Ford Fiesta 2019, which has only 0.18% of recorded corrosion problems during inspections.

Experts found that the Ford Fiesta's success in resisting rust stems from the fact that since 2017, Ford has used fully galvanized steel for all body panels and subframes, and offers a twelve-year warranty against perforation corrosion. Underbody protection is also top-notch: a wax-based sealant is injected into the sills, door frames, and chassis side members.