Power steering fluid/ ATF

**tsteeves** · 03-23-2006, 09:29 AM

I've got a 1991 535i 5spd, in the US, and I'm doing all the fluid changes.

The problem I ran into was that the sticker on my power steering cap has been partialy torn away, but there is a big "ZF" in the middle of the cap. After reading a few posts on the site it seems like most e34 use Automatic Transmission Fluid.

Are there other fluids used in the power steering systems on E34s? How can I be sure I'm using the right stuff?

--steeves

**BASEBALL248** · 03-23-2006, 11:29 AM

4 options come to mind...

Check owner's manual
Shop manual
Look on P/S reservoir cap
Call a dealer.

**632 Regal** · 03-23-2006, 01:24 PM

mine takes CHF 11

**GS535i** · 03-23-2006, 03:14 PM

ATF in mine ... check the colour: red is almost always ATF, petrosin/CF11 is green IIRC

**genphreak** · 03-23-2006, 03:37 PM

Originally Posted by GS535i

ATF in mine ... check the colour: red is almost always ATF, petrosin/CF11 is green IIRC

Were there any M30 powered cars with auto transmission (535i/635i/735i) that were produced that take anything other than Dexron in the trans and power steering? I don't think so...

**BASEBALL248** · 03-24-2006, 07:54 AM

I use DEXTRON III (ATF) in PS.

**Kobe Diesel** · 03-24-2006, 10:43 AM

ZF is a manufacturer of transmissions and various hydraulic components. Use ATF for PS system, do not use PS fluid

Redline synthetic ATF
Mobil 1 ATF Dexron/Mercon (what I use)
Any reputable ATF is good, Pentosin, as what the other fellows have mentioned.

If you would like to change the fluid yourself visit www.bmwe34.net there is a maintenance section on DIY PS fluid flush and change.

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