Firstfives.org

bmw performance · Post by **bmw performance** » Fri Jan 28, 2011 5:18 pm

I have an 81 M535 euro and the air flow meter is sticking. My spare AFMs are from a US 530 and a US 528. Can I use one of them or do I need to buy a Euro one? Anybody know the difference in a Euro and US AFM?

Mike W. · Post by **Mike W.** » Sat Jan 29, 2011 12:56 pm

It appears you're in luck, that it uses the same one as US 3.5 cars. Here is the cross reference from Realoem,

Part Cross-reference
RealOEM.com Home

Part 13627547981 (Rmfd mass air flow sensor) was found on the following vehicles:

E23: Details on E23
E23 735i Sedan, USA
E23 735i Sedan, Europe

E24: Details on E24
E24 635CSi Coupe, USA
E24 635CSi Coupe, Europe

E28: Details on E28
E28 535i Sedan, USA
E28 535i Sedan, Europe
E28 M535i Sedan, Europe

E30: Details on E30
E30 M3 Coupe, Europe

E32: Details on E32
E32 735i Sedan, USA
E32 735iL Sedan, USA
E32 730i Sedan, Europe
E32 730iL Sedan, Europe
E32 735i Sedan, Europe
E32 735iL Sedan, Europe

E34: Details on E34
E34 535i Sedan, USA
E34 530i Sedan, Europe
E34 535i Sedan, Europe

What is the number on the plastic cover on the AFM? How many pins does it have? IIRC L-jet ones like on E12s have 7 and later Motronic ones have 5.

bmw performance · Post by **bmw performance** » Sat Jan 29, 2011 9:50 pm

It is an e12 M535 not E28 M535. The correct one is a 13621359641. The US 528i is a 13621466113 and the US 530i is 13621362648. They are all L-Jet so they all plug in. The chart on the correct one is below. I just wanted to know what the difference is with the US one and can I use one of the US ones I have or do I need to buy a euro one.

Part 13621359641 (Volume air flow sensor) was found on the following vehicles:

E12: Details on E12
E12 528i Sedan, Europe
E12 535i Sedan, Europe

E23: Details on E23
E23 728i Sedan, Europe
E23 733i Sedan, Europe
E23 735i Sedan, Europe

E24: Details on E24
E24 628CSi Coupe, Europe
E24 633CSi Coupe, Europe
E24 635CSi Coupe, Europe

E3: Details on E3
E3 3.0Si Sedan, Europe
E3 3.3Li Sedan, Europe

Mike W. · Post by **Mike W.** » Sun Jan 30, 2011 4:38 pm

Wow, for some reason I could have sworn it was a 635, not 535. And that's what I looked up and referenced. Sorry. If it's a 7 pin connector and an E12 based one will plug in I would guess it will work. How well I don't know. I'd try the 530 one first and just see how it runs. With some things like this there is just the smallest difference in calibration and other times it's completely different. I know you can interchange 528 and 530 AFMs and they will run, but I doubt pass smog. Assuming it's something you dont' have to deal with give it a try and see how it runs.