17th November 2011, 04:44
M5 Guru (>2000 posts)
Join Date: Oct 2010
Location: Apex, NC
2002 M5 TiAg
Thanked 266 Times in 206 Posts
Originally Posted by jasony816
When will MAFs throw a code and require replacing? My L/H #s seems low around 100 in 3rd gear pulls, but it does not throw a code and the car is 106k do I need to replace them now or wait until there is a code?
If you are fine with the car is running, dont change. Wait for the code.
if you would like for the car to be slightly quicker and more responsive, go ahead and do the inevidable. If the MAFS are original, its a no brainer.
As far as MAF test scores go, I have recently "proven" that MAF test numbers are subjective BUT within a certain range.
I have NEVER pulled worse than 122 and never better than 131. THAT said, I car just ran a 331 (corrected) Rear wheel horsepower.
If you can replace MAFS and get in the 125-140 range, you are good to go
02 TiAG M5 - 74K Mls, Matt's latest Alpha-N, Muffler delete, E60 SSK, UUC DSSR, Dinan Strut braces, Dinan Sway Bar
02 Audi A6 Quattro
04 Aprilia RS250 (Race)
90 Honda CB-1 (Wife's race bike)
2004 Yamaha PW50 (son's)