Disclosure: This post may contain affiliate links, meaning when you click the links and make a purchase, we receive a commission. The 5 Best Performance Mods for the 1.9TDI ALH The ALH engine is regarded as one of the best diesel engines that Volkswagen has put out. This engine was in production from 1999-2006 and was found in the New Beetle, MK4 Jetta, MK4 Jetta Wagon, and … [Read more...] about The 5 Best Mods for the Volkswagen 1.9TDI ALH Engine