Yes, You need to remove the swirl flaps(google away). If these fail it can cause a lot of damage also, but this is a cheap mod and can be done in a afternoon. I haven`t heard of different Diesel engines suffering from Cam chain problems(but I may be wrong) However i cannot stress how robust these engines are,they are one of the best Diesels on the market. Go on ebay and type in BMW spares or repair, then go type in Vectra or Mondeo Spares or repair, Not many knackered Diesels BMWs around!