Originally Posted by choppedliver
Thanks for the conflicting opinions :-).
I had both taillights done with it in and no issue so I don't see how this would be different. And sure as hell they'd be going ultralight on the labour and not check anything else so I think I'll keep it in.
Unless they are replacing the cable between the battery and fuse box, it should take no more than 15-20 min per car.