A8 / S8 (D3 Platform) Discussion Discussion forum for the D3 Audi A8 produced from 2003-2010 and Audi S8 produced from 2006-2010

Steering fluid instead of brake fluid

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Old Jan 25, 2025 | 08:45 AM
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mirsad.isufi's Avatar
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From: Jax FL
Default Steering fluid instead of brake fluid

i have a 2009 a8 d3, by mistake i added steering fluid is stead of brake fluid. Tried to bleed with brake bleeder fluid pump nothing coming out of the bleeder. when i pump the pedal no presure build at all.
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Old Jan 25, 2025 | 04:57 PM
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Pumping the pedal was probably a mistake. If it was just in the reservoir you could have possibly sucked most of out out because its a lighter fluid and would have floated on top. Now its all in your system. The PS fluid could play havoc with the rubber bits in the system and they may fail later. The longer that PS fluid is in the system the worse it will get. You can try to flush it out a few times using a power bleeder and hope for the best. Better yet would be to disconnect both ends of each line and try to clean them with air, etc. Messy situation you have gotten into. Brakes are not something to play around with as your life depends on it.

Good luck.
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Old Jan 25, 2025 | 07:40 PM
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mirsad.isufi's Avatar
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From: Jax FL
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Originally Posted by AEightSilver
Pumping the pedal was probably a mistake. If it was just in the reservoir you could have possibly sucked most of out out because its a lighter fluid and would have floated on top. Now its all in your system. The PS fluid could play havoc with the rubber bits in the system and they may fail later. The longer that PS fluid is in the system the worse it will get. You can try to flush it out a few times using a power bleeder and hope for the best. Better yet would be to disconnect both ends of each line and try to clean them with air, etc. Messy situation you have gotten into. Brakes are not something to play around with as your life depends on it.

Good luck.
removed each line from abs blowed with air to each wheel, blowed each line from deposit to abs.
Blowed and aired each hole, added new fluid but i dont see liquid going from deposit to abs.even with bleeding pump at 3bar. (goes not pass thru from pump). Removed master cylinder and when i manual press the shaft only 3 of 4 holes i feel the air and the vacum. the 4th does nothing.
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Old Jan 25, 2025 | 08:04 PM
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I like to bleed at at least 5 bar using the Motive unit. It may be damaged. Did you scan the car?
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Old Jan 28, 2025 | 03:51 PM
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Giovanni Giovino 6.0+6.0TT's Avatar
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@mirsad.isufi ,
Don't you have to activate the ABS pump via VCDS to bleed properly ?

Johnny
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