E46 lower control arm...

[1977amm]

My 2005 330d has failed its MOT as the ball joint on the n/s lower control arm is knackered. Common problem on E46s! Dealer has suggested that control arms have to be replaced in pairs. However I can see them available singly on the net. Is it necessary to replace the pair? Any issues with just replacing one arm?
Thanks

[roofer]

Sods law says the other won't be far behind....

[steve_bmw]

I would always do things in pairs, I just like everything to be the same on both sides, same for springs, shocks ect.

There nothing wrong with just replacing one arm but if they have been on for the same amount of time its probably going to need doing soon.

[blondini]

There really is nothing wrong with replacing one arm if the other one is 100%. The only thing is BMW say the rear bush should not be re-fitted once removed so you shouldn't re-use the old one and it is best to change them in pairs

[essayer]

blondini said:

There really is nothing wrong with replacing one arm if the other one is 100%. The only thing is BMW say the rear bush should not be re-fitted once removed so you shouldn't re-use the old one and it is best to change them in pairs

I agree - if you are replacing one arm that isn't that old due to damage/pothole etc
but if this one has life-expired the other one will no doubt be on its way soon, and E46 steering can be wobbly enough at the best of times without introducing some more differences.

It isn't a complicated job to do and once it's up in the air having one done the extra labour to do the other is pretty minimal. I would do both.

[Patrick Bateman]

I'd get the pair done.

[1977amm]

Thanks for your feedback guys. Sounds like getting both done may well be the best option. Won't do it at main dealer price though!