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  1. General BMW Questions
    My 2005 X5 (E53) failed SMOG test recently with O2 sensor not ready. Although I had a battery change, that was over 3,000 miles ago. I've performed the drive cycle four times (using various procedures found on the Internet). I'm starting to suspect bad O2 sensors. However, there's no check...
  2. E60 / E61 (2004 - 2010)
    Hi - this post is intended for other members who have difficulty getting their E60 ready for a smog inspection due to the O2 sensors not being ready. This problem has plagued me for quite some time, and I just got an answer on my own that I do not recall reading about. But knowing how many...
  3. F30 / F31 / F32 / F33 / F34 / F36 (2012 - current)
    Hey Guys, First post here so any help is super appreciated. I need to pass the emissions smog test in California, and have removed the catalytic converter in my bmw 328i 2012 n20 downpipe. I installed one of these on the second sensor image below. O2 Sensor Spacer Adapter Bung mini Catalytic...
  4. BMW Diesel Owners & Enthusiasts
    Hello, Looking for some clarifications if possible. Been reading the forums and I got analysis paralysis. Been having some fun trying to pass smog and I think I'm close however I can't figure out the following: 1) Can my 2012 X5 35d pass smog test with the " PM Filter " still not set? Talking...
  5. E30 (1982 - 1993)
    :dunno: I have a 90 E30 with a rebuilt head last summer. Engine runs great, but I haven't been able to get it to pass smog for the last six months, so it's just sitting in the garage. Here's what I've done so far New spark plugs - NGK Iridium Cap / rotor Valve Clearance Adjustment Redline...
  6. E60 / E61 (2004 - 2010)
    Hi, I have looked throughout the forums specifically about performance improvements and emissions. I reside in CA and am subjected to the smog certification every two years. That said, I own an '08 535i that I want to add performance enhancements to. I'd like to add DP's, FMCI, DCI, exhaust...
  7. 7 Series - E65 / E66 (2002 - 2008)
    I'm having difficulty registering my vehicle due to CA smog/emissions... The Check Engine light on due to Low flow Secondary Air Bank 1. I purchased 2 check valves (11 72 7 553 101) and thought I would install them myself, but it's proven to be a difficult task due to access. I'm looking...
  8. 7 Series - E23 / E32 (1977 - 1994)
    So long story short, my car one day decided to not start (not even a click) This happened after not driving it for a day and that day happened to be really bad weather. I had thought it was my idle control since i didnt hear it turning. I cleaned it put it back in nothing happened. Then i...
  9. E36 (1991 - 1999)
    Hi, I have been reading these forums for a few hours now, and I'm not sure what steps to take next. I went through my smog check a couple days ago with my 1996 318i (M44) with 180k on it in Orange County, CA. In past years, it's been an easy pass, with just the HC numbers creeping up a little...
  10. E30 (1982 - 1993)
    Hello everyone, I recently purchased a 1989 325is with a tune, and of course failed CA smog (not even close) Could this be because of the tune? How can I go back to the stock tune? Do I have to retune it at a shop or is there a way to "reset it" kind of? Thanks!
  11. E30 (1982 - 1993)
    Hey all, I'm new here with a 1986 325es stock. I work for a shop and have been around quite a bit of custom and fabrication stuff and am savvy enough to be looking into an m60 swap on my car. I've looked into m30b35, m62, m5x, etc, and am pretty set on the m60. As far as making it go in the...
  12. E46 (1999 - 2006)
    I've been trying to get the monitors to set since april, taken it to 2 mechanics that say it needs to be driven more/has to meet exact criteria to set to pass smog:mad:. I've driven the car over 3k miles with just about every driving condition/situation known to man.absolutely no codes or...
  13. E36 (1991 - 1999)
    Hi! I bought a 1996 BMW 328i 4DR from copart about a month ago. I have driven it maybe about 200-300 miles already without registration. I can't get registration because I bought it through a dealer and they won't give me my Title because it's a Clean Title and I need to pass smog then they...
  14. E46 (1999 - 2006)
    2000 328i 182,XXX Hey Guys, I am really starting to give up on trying to fix my "SES CODES". Anyways, I failed smog about a month ago, and got until April 8th to fix all those problems to pass smog. Here are the codes from my OBD2-Scanner that I would get. P1188,P1189 (Usually They Would Be...
  15. E36 (1991 - 1999)
    So I'm on a tight budget right now but need to get my car smogged very soon and my car has a CAI that the smog guys won't do. So I was wondering if there was anyone out there to let me borrow their stock air box or if someone has an extra one laying around (or have if they don't want it). Don't...
  16. E39 (1997 - 2003)
    Ive read tons of stuff on here but im still a bit confused on how to diagnosis my P0500 code My smog is due and my check engine light was on. I scanned the car and the P0500 code showed up. So what i did was remove the speed sensors and clean them up with crc to restore some conection. My...
  17. E36 (1991 - 1999)
    So I took it in for a smog late last December and it failed. Its a 95 325is with 146,xxx miles with slight lack of power on low end all thru to 3rd gear. Results below. 15mph rpm-1754, co2-14.30, 02-.72, HC-max85,meas262, CO-max.50,meas.54, NO-max695,meas1016 25mph rpm-1872 co2-15..08, 02-.11...
  18. E39 (1997 - 2003)
    My car just failed the smog test...to prepare I did the following: Oil Change, New Plugs (NGK Iridium), Fuel Injector Cleaner. It was over on the reading for NOX. Does anyone know what this means? The guy at the shop was saying something about the Cats? Help!
  19. E36/7 Z3 (1996-2002)
    My 1998 Z3 passes the CO2 easily but not eh NO part. It is fine at low rpm's but not under load or at high rpm. It is tuned perfectly and has a new ODB II catylitic convertor. It doesn't code for Oxygen sensor. Any sugestions??
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