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Knocking noise and vibration from front end


pugboy
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2001 Passat 1.8T Sport.

I have a knocking coming from the front end. You can feel it through the steering wheel as a vibration when driving.

If you wiggle the steering wheel you can feel and hear a knocking noise as well.

The noise doesn't happen when going round corners or on large bumps. Its just little bumps that unsettle it (eg when you go up a lowered kerb like your drive way).

I tried replacing the track rod end first as this is only a £13 part, but it made no odds.

Could my steering rack have worked loose or worn out? frown.gif

The car has done 103k now so its quite possible that the suspension bushes are worn however there are bloody loads of them to replace!

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Believe the 'c' links to roll bar were changed from having a ball joint at each end of the 'c' to a bonded rubber insert, but when I don't know. The rubber won't suffer the ball joint wear and must have been changed for a reason apart from cost!

Let us know how yo get on as my wife still has the ball joints on her 98 Passat at 95k.

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Thanks. Have checked and most suspension parts seem to be about £50 each. If I am not careful I could end up spending a fortune replacing part after part.

Have found a VAG specialist thats local to me so I have booked it in for Wednesday.

I will post on here what the problem was for future reference.

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Knocking on the front, as Mulkbear rightly says, is usualy the sign of one of the front arms and usualy the lower arm.

As luck would have it the lower arm is rather expensive at around £125 for a genuine VAG part or around £70-80 from somewhere like eurocar parts. The symptoms you reported, happening mainly over small undulations in the road surface, are exactly what happens when the lower arm starts to wear (I've had 3 go in 50k) Passats and A4s eat them up quite rapidly so I have been told. I wouldn't be suprised if you find the noise comes back soon even though a loose bolt was found, I hope it doesn't for you of course!

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Yeah in all honesty I am expecting to have to replace the arms in due course. When I bought the car in September it was on 101k and we are now on 104k so I am expecting to have to replace them next year.

I have a mate with a lowered A4 Avant on 18's and that eats suspension arms (at least two sets a year)!

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