W8 4.0 (BDN/BDP) vs EA211 1.0 MPI (CHYA/CHYB/DLAC/DKRA)
Side-by-side reliability comparison
Specifications
Character
W8 4.0 (BDN/BDP)
"Volkswagen's 4.0 W8 (2001-2004), sold only in the Passat W8 4motion: two narrow-angle VR4 banks, 275 PS, three timing chains at the back of the engine. Smooth, but extremely complex. The plastic chain tensioners and guides wear and the camshaft adjusters fail (about EUR 4,000), and the chain drive and even the lambda sensors need the engine out. It is sensitive to overheating, which can scuff the cylinders. Ignition coils fail. Buy only with proof of chain work."
EA211 1.0 MPI (CHYA/CHYB/DLAC/DKRA)
"Naturally aspirated port-injected three-cylinder in the up!, Mii, Citigo, Fabia and Polo. No turbo and no direct-injection carbon; German guides recommend it over the 1.0 TSI. Watch for coolant leaks from the plastic pump/thermostat module, keep the toothed belt on schedule, and change oil on time - early CHYA engines can clog the camshaft-control oil valve."