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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sun, Nov-02-2008, 12:43:01 PM   #1
bigneil
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Default Walker O2 Sensors vs Bosch, NTK

On this web site the prices for Walker, Bosch and NTK are all similar at around $115. I found Walker (with the plug not 4-wire) on eBay for $85.

Are they much different? Should I replace both pre-cat at once or keep the older Bosch one in there for the other bank?

Link to O2 sensor prices:

http://www.thepartsbin.com/catalog/?...7&mk=BMW&md=M3
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Old Sun, Nov-02-2008, 01:27:19 PM   #2
WICSTA
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Quote:
Originally Posted by bigneil View Post
On this web site the prices for Walker, Bosch and NTK are all similar at around $115. I found Walker (with the plug not 4-wire) on eBay for $85.

Are they much different? Should I replace both pre-cat at once or keep the older Bosch one in there for the other bank?

Link to O2 sensor prices:

http://www.thepartsbin.com/catalog/?...7&mk=BMW&md=M3
You are having problems with bank one(1-3) so start cheap, replace the pre and post cat for bank one and go from there
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Old Sun, Nov-02-2008, 11:08:27 PM   #3
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Post cat will have no effect on running.

On an older car, I would replace both pre cat sensors with NTKs. Chris at Zygmunt has the best prices usually. Look for the CMUZYY thread in group buy at Bimmerforums.
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Old Mon, Nov-03-2008, 07:35:28 PM   #4
egebhardt
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I bought the BOSCH from an independent shop for $105 each. Next time, I would pull the sensor and replace it with a standard O2 sensor. Then cut and re-solder the BMW connector on. I would have saved $80 per sensor.
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Old Mon, Nov-03-2008, 08:27:16 PM   #5
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Hit up CMUZZY onn bfc. IIRC he's selling 96+ ntk O2 sensors for $75/each

http://forums.bimmerforums.com/forum...d.php?t=924610
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Old Tue, Nov-04-2008, 11:07:26 AM   #6
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Originally Posted by egebhardt View Post
I bought the BOSCH from an independent shop for $105 each. Next time, I would pull the sensor and replace it with a standard O2 sensor. Then cut and re-solder the BMW connector on. I would have saved $80 per sensor.
A standard 4 wire Bosch sensor will not work on the 96-99 BMW 328 and M3 with Siemens ECU. Those cars use titanium oxide sensors that read in reverse of the common sensor. I did use universal Bosch on my 99 528i.
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Discussing Walker O2 Sensors vs Bosch, NTK in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)