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Why is the fuel efficiency on my BMW 4 Series dropping?

I've noticed that the fuel efficiency on my BMW 4 Series has been dropping lately. What could be the cause of this and how can I improve it?

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Answers (2)

M

It is possible that your tires are not properly inflated, causing your car to use more fuel. Make sure to check your tire pressure regularly and fill them to the recommended level.

E

Another reason for a decrease in fuel efficiency could be that your air filter needs to be replaced. A dirty air filter can reduce engine performance and lead to higher fuel consumption.

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