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Discussion Starter · #1 ·
Hello All,

I recently purchases a used 2004 X3 with about 50K miles on it.

In the mornings when it is very cold, it start fine.

After leaving it sit for about 1 hr after reaching normal operating temperature, the next time you start it, it takes a long time to start. You have to crank it for about 20 seconds, or do it in two 10 secdond spurts.

I have had a dealer look at it. They found a fault code for the mass flow meter...$600 for a new one. I decidd to replace it with with a used one...$200

Question: do I need to have the fault codes re-set by the dealer, or does it re-set itself?

If it turns out not to be the mass air flow meter, any thoughts on what could be causing this problem?

Sincerely,

Stephan
 

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Discussion Starter · #3 ·
when I first put it in, it still took a long time to start. After leaving it overnight, it started OK, but it was a cold morning.

During the day, not bad, but it still sputters a bit, then when you touch the gas, it runs smooth.

Could there be an issue with the Vanos system?

Thank you
 
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