Finally, fuel injectors are a known problem on N54 engines. The same applies to ignition coils, however they typically last roughly twice as long as spark plugs. If the spark isn't able to fully ignite the air/fuel mixture then you will experience misfires. As spark plugs wear down they become less effective at generating a spark. On tuned and modified N54's, it's not uncommon for spark plugs to go bad after a mere 15,000 miles. Spark plugs are the most common cause of misfire codes on the N54. For example, misfire codes coupled with fueling related codes may indicate an issue within the fueling system. **Check for other fault codes that may be appearing, too. However, the three main culprits, in order from most to least likely, are: Quite a few various underlying issues may cause N54 misfire codes.
Below is a list of the various N54 misfire faults:įortunately, misfire codes on the N54 are generally an easy fix. Different codes exist for each cylinder so you can identify exactly where the misfire is occurring. When the N54 misfires it will generally throw a fault code. *Use control F to search for a specific fault code. Additionally, certain fault codes may apply to various non-N54 engines. These codes apply to the 135i, 1M, 335i, 535i, X6 and Z4 powered by the N54. In this post, we will cover several common fault codes for the BMW N54 twin turbo engine.
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