MAF Sensor "Lifespan"? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 02-25-2009, 08:40 PM
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MAF Sensor "Lifespan"?

Anyone know how long the mass airflow sensor is expected to last?
I have 130K, SES light, and lean codes 0171 and 0174. Parts chasing with an item this costly is well, costly, but can't find a leak, and am leaning toward replacing the MAF if the lifespan is around 7 years anyway.
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#2 (permalink) Old 02-25-2009, 09:29 PM
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A few things......1st, I would think @ 130k, yes it is very likely that the MAF can be done, 2nd, did you try cleaning it & 3rd, unplugging the MAF provides a good test to see if your MAF is dead. If the engine runs better with the MAF disconnected, it is likely your MAF is not functioning.

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#3 (permalink) Old 02-25-2009, 09:30 PM
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Most E39 MAF's don't last nearly that long. They're a very failure-prone part on our cars.



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#4 (permalink) Old 02-25-2009, 09:31 PM
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johnny,
Yea, I cleaned it, twice, w/ electronics cleaner, but thanks for the unplugging tip! I'll try it. It does not really run bad though, just a little rough idle.
Rob
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#5 (permalink) Old 02-25-2009, 09:36 PM
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Quote:
Originally Posted by Teh Prof View Post
Most E39 MAF's don't last nearly that long. They're a very failure-prone part on our cars.
Thanks, Prof
I found one for $201.77 on line. Hows that sound?
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#6 (permalink) Old 02-25-2009, 09:47 PM
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Quote:
Originally Posted by longrob View Post
Thanks, Prof
I found one for $201.77 on line. Hows that sound?
That sounds good....lower than the 2 prices I found....

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#7 (permalink) Old 02-26-2009, 07:08 AM
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Do not buy a cheap version, make sure its a Bosch, or you will find it will need replacing again in the not so distant future.

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#8 (permalink) Old 02-26-2009, 07:46 PM
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marti5,
thanks for the tip. Have a source? I did not find a Bosch air mass meter for my 2002 530.
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#9 (permalink) Old 03-23-2009, 04:48 PM
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Quote:
Originally Posted by Teh Prof View Post
Most E39 MAF's don't last nearly that long. They're a very failure-prone part on our cars.
I replaced the MAF sensor and I am good to go. SES light has not reappeared in 300+ miles. Thanks all!
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