My passenger seat makes this annoying knock or rattle, the 4 bolts holding them to the car are tight so where else should I look? When someone sits in it or I hold it in place it doesn't knock
They move fine so I assume it's latched in correctly? Where do I check for that? It might be tilt it's really hard to tell when driving, can you tighten the tilt mechanism?
Recaro cs? They do get a bit knocky, try nipping all the bolts up on the subframe. Its quite a common issue sadly