Air flow meter difference
Moderator: martauto
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MatZZ
- E30 Zone Newbie

- Posts: 75
- Joined: Fri Jul 18, 2014 11:00 pm
Is there any? They dont look different . Could i use m40 one on my m20??
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jimbom30cab
- Tech 1 freak
- Posts: 7631
- Joined: Mon Oct 12, 2009 11:00 pm
- Location: in the garage
nope M20 is bigger mate and i think the 2.5 may be different to the 2.0
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alpina123
- E30 Zone Regular

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- Joined: Wed Dec 29, 2010 11:00 pm
Number should end in 082 or 083 depending if it is 2 or 2.5ltr
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Grrrmachine
- E30 Zone Wiki / Team Member

- Posts: 8043
- Joined: Sat Feb 09, 2008 11:00 pm
- Location: Warsaw, Poland
They differ internally in terms of the electrical signal they send out. So no, you can't put an M40 one on an M20.
'89 325i Touring | Touring Resto Thread | In-Dash Screen install
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MatZZ
- E30 Zone Newbie

- Posts: 75
- Joined: Fri Jul 18, 2014 11:00 pm
ok thanks guys. looks like i need an air flow meter
