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catalytic converter

  1. E63 / E64 6 Series (2004 - 2010)
    I am getting fail codes on Catalytic converter.. also on BanK 2 up and down on the O2. Do you think it is the Cat or the O2 sensors? or something else. ?
  2. E39 (1997 - 2003)
    I've looked this up on multiple forums and haven't been able to get ONE consistent answer to this question which I thought would've been fairly easy to find. I'm looking to make a custom exhaust for my 97 540 and I want to install an X pipe right after the O2 sensors but I want it to clamp on so...
  3. X5 E70 (2007 - 2013)
    hi guys, please help I am in California, just bought a used 2010 BMW x5 with about 95,000 miles on it. I was being cautious, and asked previous owner to provide a smog test, which she did. so we made the deal, paid her, drove home. next day, 2 codes showed up on my Acron CP9580 scanner: P0420...
  4. X5 E53 (1999 - 2006)
    I'm replacing cat on my E53, code P1093, bank 1 too lean, what do you guys think? Transmission Fail Safe, swap the TSU, still on. Thinking of replacing the filter on tranny, may be pressure lost? Reverse some times do not work after long period of riding. Jay :)
  5. E36 (1991 - 1999)
    Hello everyone! After browsing through our local car advertisement forum for weeks we found a diamond in the rough. I am writing this post because your girl over here needs some help! Jokes aside, I would highly appreciate some tips on how to fix the rust and some other issues. We are talking...
  6. E39 (1997 - 2003)
    I need help interpreting these oxygen sensor scanned readings. 2003 525i 160k miles Both upstream sensors are new Bosch Both downstream sensors are original Previously I replaced the CCV which was causing a large leak Replacing the upstream sensors solved the readiness registers not setting Now...
  7. E36/7 Z3 (1996-2002)
    My 98 Z3 Roadster Catalytic converter comes as one piece from head to tail, the other models don't I don't understand why, question, can one be welded in cheaper and where can I get what I need? I also have other posts, needing a power steering pump and an A/C compressor for the same car. love...
  8. E90/E91/E92/E93 (2006 - 2013)
    Hello everyone. I’m trying to become more self sufficient with my UK Spec, 2008, 320i E90 and also be able to help others out in my neck of the woods if I can. Mechanically I’m coming along reasonably well and can do the basic, obvious, or well documented repairs or service on my car. I have an...
  9. E36/7 Z3 (1996-2002)
    I am going to need a new Catalytic Converter soon and have noticed the replacement's online include the entire tail pipe for the 97' and only the Converter on the 98 and others. My question is do I need to buy the whole tail pipe assembly or can the Converter be cut out and replaced? Also, where...
  10. 7 Series - E65 / E66 (2002 - 2008)
    I need your help and advice. My 7 recently seems to be a trouble pit. The check engine light has been turning on/off. Now it's on constantly. Today the car is shaking, feels like it wants to shut off and theres no acceleration. I shut off the car for about 30 min and now the car seems ok...
  11. E90/E91/E92/E93 (2006 - 2013)
    Hello there, here it's the issue on my son's car, it's a 2011 335i with the n55 engine. Replaced recently the oil pan gasket, the oil filter housing gasket and the valve cover gasket, and 3 days ago the car started dripping oil directly into the bottle shape part of the catalytic converter, I...
  12. X5 E70 (2007 - 2013)
    Hi I have an E70 2008 N52 Engine and recently removed my clogged Cats (don't have cash to replace). I have CEL and codes 0029F4 and 0029F5 DME catalytic converter conversion. wondering what options I can code with NCS Expert to disable the CAT from the DME or something like that so the car...
  13. E46 (1999 - 2006)
    2003 325i with 185k, need to purchase (NOT Cali or NY) CC that is reasonably priced...any suggestions? Need front and rear (1-6) Thanks in advance!
  14. E46 (1999 - 2006)
    i'm doing a cylinder head gasket job and the bottom studs on my exhaust manifolds where totally seized up and i had to cut some off too. Instead of spending hours drilling them out I decided to let the professionals take care of it, so I took my two exhaust manifolds to the muffler shop. After...
  15. X5 E53 (1999 - 2006)
    Has anyone changed out an X5 Cat? Mine developed a hole in the pipe at the rear cat. Thinking about Dorman after market. LOUD! Got a quote from Midas for $1K for their brand, incl. $500 labor. A friend of mine got a BMW OEM at an indy for $1,800. Ouch. Are there any fit issues with after...
  16. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    So my 2008 335 xi needs new converters and wanted to know if anyone ever ordered new ones off of rockauto and had no issues or what not. I need to pass emissions asap
  17. E90/E91/E92/E93 (2006 - 2013)
    When I was driving my car I received a pop up error that stated Malfunction in Drive. I took it to my dealer and they told me it was due to my water pump having problems. They replaced it for $1,700. The following week I received the same error when I was driving my car, this time when I was...
  18. E39 (1997 - 2003)
    :dunno:Two weeks ago,I received my car registration renewal notice 3 days before the check engine light came on. The last time the check engine light came on was 1 1/2 years ago. At that time I had a scan done by my mechanic and it indicated I had a catalytic converter issue. He cleared the...
  19. X5 E70 (2007 - 2013)
    Recently, I have been noticing a loss of power/acceleration/speed. I can't get passed 40mph. A few months ago I got some codes, but the codes went a way, so I didn't think anything of it: P0430 (Catalyst System Efficiency Below Threshold, Bank 1) and P0420 (Catalyst System Efficiency Below...
  20. 7 Series - E65 / E66 (2002 - 2008)
    Hi Everyone, I recently purchased a 745i, 2004. Two problems with it, the first one is it leaks oil (turns out its a stripped oil drain plug, needs a new pan) and there's a check engine light. The mechanic who changed the oil on it told me that the check engine is caused by something related...
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