| | Catalyst Rattle and extended warranty
My '98 Z-3 (1.9) has a new sound at muffler. It is a rattling noise. There are no visible defects or metal-on-metal contacts. Sound is within exhaust system. I read an old letter I rec from BMW back in 2002? It looks like the rattle is a catalyst prob (loose monolith). From what I can tell, this issue may be covered under an extended warranty as it is part of emission system. The letter extends coverage 8 years or under 80K miles. Hope this is the case. Anyone had probs or related expenses? Please advise before I get to dealer. Note: the letter mentions potential prob with catalytic converter.