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Frequently Asked Questions

What are the symptoms of a BMW E90 335i with high fuel injection?

Newer BMW vehicles, starting from E90 335i, have engines with high-pressure fuel injection. This is a delicate system that can be damaged by low-quality fuel. High-pressure fuel pumps and injectors are the usual failure points. Symptoms include engine hard starting with long cranking, rough idle, and a yellow 1/2 'check engine lightengine light.

What causes BMW engine malfunction reduced power?

A weak battery can cause BMW Engine Malfunction Reduced Power message on the iDrive screen. BMW vehicles are susceptible to voltage, and if the battery is old, it may hold a proper charge. If your battery is over 7 years old, it is time to change it to avoid other electrical issues.

What causes a BMW 335i alternator regulator to go bad?

A bad alternator regulator can cause similar symptoms, as well. Newer BMW vehicles, starting from E90 335i, have engines with high-pressure fuel injection. This is a delicate system that can be damaged by low-quality fuel. High-pressure fuel pumps and injectors are the usual failure points.

Why does MY BMW feel weak when I accelerate?

In most cases, power output and acceleration are heavily affected. You must check and replace the faulty pump or injectors as soon as possible. If you have a turbocharged BMW that feels down and powerful and sluggish on acceleration, you may have a boost leak.


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