Question about 2005 Audi A3

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Camshaft sensor on Audi a3 keeps breaking had two

Cam shaft sensor went on audi took it to the garage and had it replaced three days later problem started again so back to the garage and they say must have been faulty sensor and replaced free of charge. Now three weeks later same problem. Help

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  • kj110971 Jun 05, 2010

    Thanks will look into it

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  • 138 Answers

They normally last long, they need to check that the rotor cup that the speed sender gets its signal from is not damaged and has the correct spacing. Also check for oil contamination from leaking cam seals.

Posted on Jun 05, 2010

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Posted on Jan 02, 2017

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Camshaft sensor


Do you know if the engine timing is correct? If you get the timing a tooth out you very similar issues, has the cambelt been replaced recently - or is it over due??
Another posibility is the cam chain adjuster. This is oil pressure fed and I think controled by a solnoid, it applies a force between the chain that drives the inlet camshaft from the cambelt driven exhaust camshaft. (Making any sense? Let me know if you want me to simplify) This operating correctly advances and retards the valve timing, when faulty it can make it incorrect. Non start is a fault caused, but more often they become very noisey.
The cam chain adjuster is fed oil when the car is started, you can breifly here it before it has reached operating pressure on normal start up, sounds like a diesel knock for a second, then goes, this is normal. If it continues, its more than likely faulty.
Let me know if you want any more info. If the sensor and wiring is good you'll probably have a timing issue.

Mar 24, 2009 | 2005 Audi A3

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