[MrSweet1991]

Originally Posted by Broken_Gearbox

You'll need to drain at least a litre so you could syphon it out or use a fluid removal pump tool. Drain what you can. Cap back on. Engine on. Turning steering left to right full lock each way. Engine off. Back to reservoir. Cap off. Fill up. This way you can achieve around 70 per cent new fluid with repeated drain and refill. When it comes to filling it. It's similar to before with full lock each way except you are adding fluid this time. Don't over fill.

Thanks mate, at this rate of not knowing 100% what fluid should be in there and if there ever was a CHF11S sticker that's come off I think I might take it to BMW or something so I can blame them if it's wrong haha.

[dragerboy]

Syringe arrived today

[MrSweet1991]

Originally Posted by dragerboy

Syringe arrived today

Attachment 1624607

Let us know how the steering is after changing the fluid .. my steering is really heavy but I assumed that was because of the run flat tyres and purposely done for a sportier feel.

[Calluhan]

If i can help see my thread here: http://www.e90post.com/forums/showthread.php?t=1105836

[oli3]

You need to change that fluid asap!
There's youtube videos on how to syphon this out, watch those to familiarise yourself and just do it, steering will be so much smoother day and night difference!

It's really easy to do, half an hour job in total. Basically what you do is buy 1l of fluid (find out if ATF of CHF) and then you syphon old fluiod out from the tank and replace with new fluid. Take the car for a slow spin round the block making full turns on the steering wheel. Then repeat again, syphon and replace with new fluid. 1l should be able to get you 3 flushes.

[dragerboy]

Just to confirm I flushed just over 1 litre over a period of about a week. Certainly has helped and got rid of the slight groaning I had near full lock.

[Asonchadwick]

I pulled a sample of my fluid and i cant tell a thing. I have a 2010 335d. Cap says atf. Called dealership and the parts department says its chf11.s

No one knows for sure because they admit bmw may have a tsb that calls for atf but no one knows for sure. They say if i took my car into have the power steering serviced they will be putting in chf11.s as the fluid.

I mean why would it have a cap that says atf only unless it had a sticker and the sticker came off.

[djgandy]

Originally Posted by Tucson335d

I mean why would it have a cap that says atf only unless it had a sticker and the sticker came off.

Pain in the ass eh! I have no idea how you actually find out what you need, but assumed most newer e9x were CHF.

[ChawenHalo]

Originally Posted by djgandy

Doesn't the steering reservoir say "CHF11S only" on the cap?

Yes it does. I have Servo Tronic on my LCI, which is variable assistance - less effort in town and heavier at speed (for some reason XDrive on LCI on the continent kept the Hydraulic system as standard like pre-LCI) as opposed to the LCI electric variable rack (variable rake/ steering angle) I think its called Active Steering.

Perhaps if Pre-LCI cars had the option of Servo-Tronic (option S216A) then you have to use CHF11S?

Check with your VIN number.

[MrSweet1991]

Originally Posted by djgandy

Pain in the ass eh! I have no idea how you actually find out what you need, but assumed most newer e9x were CHF.

Hi mate,

I popped down "The BMW Independent Specialists, Hinckley" and I asked him the same thing. He said it wouldn't be printed ATF only on the cap, and he dipped his finger in and to be honest it definitely looked red (ATF).. I suppose if it was the wrong oil it would have damaged the power steering pump by now so I'll assume for now it's right lol.

[abeardo83]

My other half's e90 diesel uses ATF. My M3 uses CHF11S

[ChawenHalo]

Originally Posted by 37psi

You're misreading Real OEM

The oil carrier is CHF 11S.

The sticker label is ATF. Look up the sticker parts and they are all CHF 11S

http://www.realoem.com/bmw/enUS/show...diagId=32_1514

If you have servotronic its CHF 11S.