A loud knocking sound coming from under the car, not from the wheel areas, more central, under the passenger side

It knocks when driving along but goes away at higher speeds but comes back when decreasing speed and gets louder

It can't be heard from outside the car, just in the cabin

The steering is fine, no judder or play

Off into a garage tomorrow, this is going to be expensive, isn't it :bang:

Exhaust knocking?? Really tricky working out where noises come through, but if it's not from the engine or gearbox area then it shouldn't be too serious / expensive. Fingers crossed for you and let us know what it is..

Good luck Dave, lets hope its something silly.... like a mouse whacking spoon on your exhaust when you moving slowly and needing to grab hold of something at high speeds hence no noise then

Rear engine mount is under the car between the front two seats :/

either that or exhaust there isnt anything else under there....

engine mount problems are normally easy to spot, had it myself on my old audi. You get the car shaking little bit when idle. So if Dave doesnt get the shakes I doubt its a mount

Well that turned out better than I thought it would

Before I took the car down to the garage I had a quick look around the car, wobbled the exhaust and kicked and pushed things

Then I checked the front passenger wheel and all but the locking wheel nut were hanging out on nearly their last thread Tightened them up and took it for a run, problem solved

I feel daft for not checking this earlier

DavePanda100 said:

Well that turned out better than I thought it would

Before I took the car down to the garage I had a quick look around the car, wobbled the exhaust and kicked and pushed things

Then I checked the front passenger wheel and all but the locking wheel nut were hanging out on nearly their last thread Tightened them up and took it for a run, problem solved

I feel daft for not checking this earlier

Click to expand...

I was going to say have you checked the wheel nuts

Glad its sorted now

lol!
My dad's car had same problem, driving along next min we hear rattling from the front. Stop to check but couldn't find anything wrong until I told him to move the car a bit. Rattle came from the front passenger wheel. Took wheel center cap of to find 2 out of 5 wheel bolts came undone and were rattling inside . And he just came from the garage.... turned out their compressor lost power and then after we left died... but they failed to check the bolts!

Perfect result. Strange how things rattle at low speeds and then go quiet..

jeezus that's poor