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This is Kingfish that problem I had a few months ago that we assumed was a vacuum leak.... in the end... it was the intake throttle position sensor, I replace the exhaust sensor at the same time. The steelership wanted over $600 buck to fix it. I did it myself for the price of the sensors, very easy job. Got a new problem, my pusher fan has bitten the dust, can't run the AC in town only on the highway. I can do the job, requires removal of the front bumper, I've r&r the front bumper, been there dont that. Unfortuntately the male/female connector is BAD. The new pusher has the male connector but I have to replace the female connector to the harness, the steelership wants to sell me the harness for a reasonable fee, yea right. Where can I find a female connector, I've tried several sources? It requires a 12 guage 3 prong connector but I would like to use the male on the new fan rather than cutting it to adapt. You have any suggestions? I also need an MAF sensor, I read somewhere that Ford uses a Bosch type on their trucks that interchanges with a BMW just don't let BMW find out about it. The steelership wants $390. The Ford truck version, which is suppose to be the same costs about $75. Does any of this sound to good to be true?
The order of the cylinders for all BMW 6-cylinder engines is 1 through 6, starting at the front of the engine. In other words, cylinder #1 is at the front of the engine (behind the radiator) and #6 is at the rear of the engine (close to the windshield).
Hi Fudman, I hope you are enjoying your Easter. So let me see if I understand this. You are saying that Bank 1 is closer to the front of the vehicle (radiator) and that Bank 2 is closer to the rear of the vehicle (firewall). Do I understand that correctly? So cylinder 1 is closer to the front of the vehicle (radiator) and cylinder 6 is closer to the rear of the vehicle (firewall). Do I understand that correctly?
Bank 1 and Bank 2 indicates the different exhaust streams that the sensors are located in. Bank 1 refers to cylinders 1, 2, and 3; Bank 2 is cylinders 4, 5, and 6. Bank 1 is the exhaust manifold toward the front of the car and Bank 2 is the exhaust header immediately aft of that. I think that hissing sound you hear is the secondary air pump kicking on during a cold start.
I'm the guy with the 01 525i that had the vacuum leak. In the end it was 2 coils and intake position sensor, did it myself $200 parts. car runs fine unfortunately I keep getting that pesky CEL about every 60 miles. The latest and only code is
P0174 pointing to the Oxygen Sensors Bank 2. Question I have for you,.... is Bank 2 closer to the radiator or firewall? Is Bank 2 comprised of cylinders 1,2,3 or 4,5,6? Is the only difference between the Oxygen Sensors the length of Leadin Wire? And where is the location of the Post-Cat electrical conections? I'm going to do Bank 2 tomorrow and Bank 1 next month to keep the expenses down. I'm still concerned about a vacuum leak being I get a slite hissing sound when I first start up the car, but it goes away after warming up. The car drives and excellerates fine.