If a P0300 (Random or Multiple Cylinder Misfires), P0301 (1st Cylinder Misfire), P0302 (2nd Cylinder Misfire), P0303 (3rd Cylinder Misfire), P0304 (4th Cylinder Misfire), P0305 (5th Cylinder Misfire – VR6), or P0306 (6th Cylinder Misfire – VR6) then one of your ignition coils are more than likely bad. If you are experiencing any of the symptoms above, we would advise using a code reader to self-diagnose this problem.

CEL (Check Engine Light) or EML (Engine Management Light) On.

It is advised to change the ignition coils every 40k to 60k miles, but sometimes, if not properly maintained, it could be more frequent. In fact, usually when ignition coils fail, there tends to be an underlying issue with improper spark plug gapping, faulty or damaged valve covers or moisture buildup. Ignition coil failure, for the most part, aren’t usually tied to poor ignition coils. An ignition coil transfers the battery’s voltage to charge the spark plugs, which then ignites the fuel. Ignition coil failure is probably one of the most common problems for most Volkswagen vehicles, not sure why that is, but it seems to be a trend. Regardless of the engine, you are more than likely going to experience ignition coil failure at some point of ownership.

DPF (Diesel Particulate Filter) Clogged.

Common Volkswagen MK4 Jetta (Bora) Engine Problems So, we will attempt to differentiate which problems are more common in specific engines. Something worth mentioning before getting into the common problems for the Volkswagen MK4 Jetta is that not all the problems listed below relate to every single engine the Jetta has featured. It gave the owner flexibility with the abundance of engines and trims. The MK4 Jetta was slightly shorter than its predecessor, the MK3 Jetta, but featured a new trademarked design for Volkswagen ditching the traditional sharp creases and introduced an entirely new face. For the 4th Generation Jetta, Volkswagen really tried to pull the design away from the Jetta’s “sibling”, the Golf. The 4th Gen Volkswagen (MK4) Jetta, or Volkswagen Bora in many parts of the world, was first produced in 1999 and ran to 2006. Disclosure: This post may contain affiliate links, meaning when you click the links and make a purchase, we receive a commission.

Jetta mk4