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  1. Volkswagen Passat B5 Discussion
    I need good used catalytic converter for Passat '04 1.8T AWM. The part number 8D0131702HP (or HN). Let me know what you have
  2. Parts For Sale
    AUDI VOLKWAGEN 1.8 TURBO 170hp Catalytic Converter 8D0131702HP As title states have a stock cat from my 2004 Passat 1.8t. No codes or issues. Pulled with 88k miles on it. Can send pics on request. $95 shipped
  3. Volkswagen Passat B5 Discussion
    Okay, I know this is nuts, however: I had a bunch of work done my 2001 GLX with 165K on it. Valve cover gasket, new plugs and plug wires, AC vacuumed and refilled. All this time, the "check engine" light has been on and reads as catalytic converter on the computer. Also, the interior...
  4. Volkswagen Passat B5 Discussion
    I'm getting these two codes that crop up about every 200 to 300 miles or so on my '03 Passat V6. They always come up together. After doing a lot of reading/researching, most people simply replace their cats when these codes come up. However, I REALLY want to avoid that since I am in...
  5. B5 Garage
    Hey everybody, I found out that my 2005 Passat isn't getting boost because of a clogged cat. A mechanic quoted me $780 to replace it, but when I said that might be too much, he told me I could also just put in a delete pipe. He said he wouldn't do it because he could get in a lot of trouble...
  6. Volkswagen Passat B5 Discussion
    GLX 2.8 V6. 150k. I've been using a bluetooth scanner. When I bought this car it had no CEL. Couple hundred miles later was getting misfire codes. Changed the coil pack, spark plugs and wires. Somewhere along the lines broke a vacuum line (recent post). Replaced that. Now I am getting...
  7. Volkswagen Passat B5 Discussion
    I've been dealing with a P0420 for several years new, but now it's starting to effect performance and gas mileage. Mileage is down from about 28 average to 24. Car is noticeably slower accelerating now than it was before. I now have a P1556 - Charge Pressure Control: Negative Deviation. I...
  8. B5 Garage
    catalytic converter inlet/outlet diameters Can you tell me the factory dimensions, anyone? Sorry to post another exhaust thread, but I have a dead cat in my exhaust and need a new one. The race shop found that out when putting in my TT catback. They gutted it for me, but I'm into the...
  9. Volkswagen Passat B5 Discussion
    What is this part? Hi, sorry beforehand that I am not very good with cars at all and rely mostly on YouTube and my brother haha. I thought it was the Catalytic Converter but nevermind lol I have no idea what it is. Part of it just popped off when I went up a mountain and now my Passat sounds...
  10. Volkswagen Passat B5 Discussion
    I'm trying to sell my Passat. Of course, right before the sale went through, my check engine light came on. Someone took it to Advance Autoparts to "run the codes." They told him that three cylinders were mis-firing. He then took it to a local VW authorized service station. They told him...
  11. Parts For Sale
    Hello Passat World. I joined the Forum about a decade ago, haven't been around much lately. I had a 2001 B5 wagon, later passed to my son we retired about a year ago just shy of 200,000 miles. (Now Volkswagonless after 66 bus, 68 Karmen Ghia, 70 squareback, 80 Rabbit Diesel, 84 Jetta, 2001...
  12. Volkswagen Passat B5 Discussion
    I have a 99 Passat 1.8 AEB engine code FWD, I hear a rattling noise from inside the catalytic converter I purchased a new one what should I expect the cost in labor to be...thanks in advance!!
  13. B5 Information-Base
    I replaced the downpipe on my '99 B5 1.8T AEB engine a while back, but I made the mistake of trying to do it with the catalytic converter still installed. I wanted to pass along this method so the rest of you don't follow in my footsteps and make the same mistake. The following procedure will...
  14. Volkswagen Passat B5 Discussion
    I was just wondering if there is any difference in the Euro-spec and US-spec cats. I have no codes to tell me the cat is bad but the exhaust smell is terrible and I believe the cat might be clogged.
  15. Volkswagen Passat B5 Discussion
    Having just replaced the PCV system and drive shaft, and thinking I could finally take my freshly acquired Passat out of town, a CEL came on (apart from that, the ride is now noise-free, and smooth). Had the system read out, indicating two fault codes: 16539 Oxygen (Lambda) Sensor B2 S1...
  16. Volkswagen Passat B5 Discussion
    Hi all, My 2002 B5 1.8t is a mess. I just replaced the valve cover gasket and spark plugs and during the job, I broke a vacuum hose (picture below). I replaced the hose with a radiator hose recommended by the manager at O'Reilly to fit that L shape. Immediately after the job, I noticed a loud...
  17. Volkswagen Passat B5 Discussion
    My aunts bf who is a pretty good mechanic says I need a high flow cat. I am sure he will be the one installing it so if I show up with one that isn't high flow I am sure I will hear about it. I searched all over the net yesterday. And only thing I found was that a high flow cat could cause an...
  18. New Member Introductions
    Hello, New to the site and thought maybe I would see if I get a response in here on my 1st post. My aunts bf who is a pretty good mechanic says I need a high flow cat. I searched all over the net yesterday. And only thing I found was that a high flow cat could cause an engine code to trip. I...
  19. Volkswagen Passat B5 Discussion
    My wife's 2004 wagon has been throwing O² codes and emissions is coming up. It runs perfectly. The dealership (for free) looked at it and says that the codes are the result of the previous owner letting someone replace the flex pipes with regular pipes poorly welded in. The welds are leaking. I...
  20. Volkswagen Passat B5 Discussion
    I need to replace my cat on my 2003 2.8. I found the instrux on the site, which are excellent except they only show the drivers side. The passenger side is not nearly as accessible. Just surveying it i can't see any way to get a tool on the top flange nut. Has anyone done this job? If so how did...
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