The vag 2. Tdi engine is identified to have injector problems, which can cause a variety of issues such as rough idling, misfiring, and reduced power output. Some owners have reported that faulty injectors can also cause engine damage if left unchecked. volkswagen golf tdi the golf tdi has consistently been praised for its reliability. Models from 2010 to 2014, with the 2. Tdi engine, are particularly noted for their durability and longevity. These models tend to have fewer issues compared to some of the other tdi options.The VW Crafter 2. TDI with 136 hp developed into the most reliable engine of the generation – it offered sufficient power for all purposes, consumed a moderate 8.The VW Crafter 2. TDI with 136 hp developed into the most reliable engine of the generation – it offered sufficient power for all purposes, consumed a moderate 8.How Long Can a Diesel Engine Last? The average lifespan of a diesel engine is typically around 500,000 miles. With proper care and maintenance, they can last over 800,000 miles. There are differences between the lifespans of commercial and personal diesel engines. Is It Worth Buying A High-Mileage Diesel Truck? Indeed, high mileage on a diesel engine doesn’t automatically make it a bad buy—if it’s been maintained. Unlike gas engines, diesel engines are built for longevity. A well-cared-for diesel can run 300,000–500,000 miles.