I have recently noticed that my BMW 4 series is not getting the same fuel efficiency as it used to. What could be causing this issue and how can I fix it?
ReplyThe most common cause of decreased fuel efficiency in BMW 4 series is dirty air filters. Make sure to check your air filter and change it if necessary.
Another reason could be worn out spark plugs, causing the engine to work harder and use more fuel. Consider replacing your spark plugs if they are old or damaged.
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