Tech Tips shows repair methods, but a thorough fix involves removal of the intake manifold to ream out vent piping. Where did it come from? Here's some additional information, not sure if it's helpful. I concur that O2 sensors can throw these codes. You will only be cutting out the old cat and welding in new cats. Once again duplicate the step on the right side exhaust for the other two oxygen sensors. The 30 minutes long footage focuses on the exterior and interior design of the E39 M5, on its engine and suspension engineering, and finishes with a few minutes of car porn at the legendary Nurburgring race track.
These catalytic converters keep your vehicle emissions compliant. Although we make every effort to present accurate information, Bizrate is not responsible for inaccuracies. Engine misfire for any other reason or fuel delivery system malfunction can cause cats to burn up. The rear cover diaphram valve clogging or failing is generally only symptomatic. Store ratings and product reviews are submitted by online shoppers; they do not reflect our opinions and we have no responsibility for their content. It is probably easiest to slide the exhaust out of the back of the car so you may want lay down something to protect the exhaust from the ground. Hot exhaust gasses are forced through louvers and into dead-end chambers.
Remove the 4 13mm fasteners green arrows that hold the flange on the exhaust downpipe to the flange on the exhaust manifold. I would advise you to purchase a set of used cats from some M5 gearhead that put race cats on. Before and after: You won't need to worry about the 02 Sensor bungs because they are not in the cat on your existing system. In this tech article we will review all the steps to remove the entire exhaust system. Is there any negative effects on the car from driving around with a bad cat? What more can I say.
You may not have these but simply have straight pipes. If it's the ladder I will for sure have to investigate the Magnaflow solution. I looks like it'll be less than half. If I do buy Magnaflow cats, do I need to buy them 2 spots for the O2 sensors? Where did it come from? Is there a way that I could tell if it's the cat or O2 sensors that are bad? Well I think you need another professional opinion before you go and buy anything more. The engine has 173k miles so it just might be time for cat but I'm all for going through the o-sensor try first, more likely the o-sensors need replacement anyway? Replacing your failed catalyst without solving the root cause of failure will void warranty and significantly reduce lifespan of the replacement catalyst.
Here's my car: 1997 540i-6 120K miles Dealer says that the cat on bank 1-4 may have been replaced before. Search for posts about good aftermarket units. The problem was the 02 sensors. After reading more posts, I think I may go the Magnaflow route. Installation is the reverse of the removal steps.
Comments and Suggestions: Jake Comments: Recently encountered a problem in where my exhaust became quite loud. Did you do a back pressure test? The car will just not want to go. Although I expected I was right. On the i6 99+ the cats were moved up closer to the engine and are part of the exhaust manifold. Figure 16 Carefully remove the jack stand under the middle of the exhaust. My car is originally an Oklahoma car, not a California car.
Your service advisor at Bob Smith is a smart guy. In this revision of performance levels, the previous Sport Performance was eliminated and the previous High Performance was re-named to Sport Performance. If Auto Zone sells exact replacements for cheaper, go for it. This is not the cat. You can not run a car on bad cats for long. The oxygen sensors can be removed separately from the exhaust or can be removed with the exhaust. Eisenmann Exhausts are customized to meet your individual preferences.
Position the exhaust on the jack stand by the front of the exhaust and position the jack under the rear muffler and jack it up to meet the body. Even ignition wires can burn up due to an overheated, inefficient exhaust system. I read that the 540i has a 2. Sometimes it turns off imediately, other times it will stay on for a few days and then go off. He is milking you dry with his recomendations. During these hiccups, the check engine light will go on. I've read here some folks replace their sensors every 60k or so as a preventitive.