New Or Old Maf

[por986]

looking to replace MAF on a '01S (58Kmi).

Sunset quoted me for the orignal MAF and the "newer model" MAF. There was nearly $150 difference in price with the orignal (older MAF) being the more expensive one. The rep stated that if I purchase the newer model, I would need some type of reprogramming while the older MAF would be a straight replacement. I would have gotten more details from the Sunset rep, but he seemed a bit put off with my questions and wasn't forthcoming with any information.

Can anyone provide details...

1. What is the difference between the old and new?

2. What programming/adjustments are necessary if using the newer MAF?

3. What costs are associated with going the newer route?

Thanks in advance!!

[geoff]

Do you know what version MAF is installed now? If you have a 996.606.125.00 and the new version is 986.606.125.01 you do not need to have the DME reprogrammed. However, you should disconnect the battery for a few minutes after swapping so the computer re-learns. See Mike Focke's most excellent MAF page for details. The newer MAF is supposedly less susceptible to dirt and fouling than the old one.

If you haven't ever cleaned your throttle body, it seems like a lot of times after replacing the MAF your idle becomes uneven shortly thereafter. Not sure what the correlation is, but that's what I experienced and others have noted.

[Wayne R. Dempsey]

The Mass Air Flow sensor situation can be very confusing. I've written an article about this which aims to clarify what you need:

http://www.pelicanparts.com/techarticles/Boxster_Tech/27-FUEL-Mass_Air_Flow_Sensor/27-FUEL-Mass_Air_Flow_Sensor.htm

Hope this helps,

-Wayne

[por986]

So sorry it has taken me this long to reply. I finally got around to opening the bay! Looking at your article Wayne, I am a bit confused since I don't see my combination of BOSCH/Porsche part numbers...

0 280 218 055 986.606.125.00

It seems clear that I need 986.606.125.01, but I would like to understand why the Bosch number I am reporting doesn't relate to Porsche's 125.01 and can I be certain that a DME reprogramming isn't necessary? Sorry, I have been conditioned to fear discrepancies :-\ I don't seem to have the best luck!

Thanks again guys!!

[Wayne R. Dempsey]

I'm not sure - BOSCH may have a different methodology for their part numbers. You are right, you need the 125.01 part number for your car.

-Wayne

[por986]

Thanks again!!