My 86 325e currently doesn't have an O2 sensor, and the exhaust manifold is missing the hole to where the O2 sensor screws in. I recently got a new catalytic converter and muffler but those are also missing any mounting holes for the sensor. Where can I install it?
screws into the exhaust downpipe just past the manifold. if one isn't present you will have to add a bung to screw it in. has the exhaust on the car been replaced in the past ?
I believe the single O2 sensor is typically found just forward of the catalytic converter or where the factory ‘cat’ was. Needs to be in the merged exhaust stream.
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Last edited by bluptgm3; 10-20-2018 at 10:32 PM.
No, this is a new catalytic converter. It's a really cheap Bosal Catalytic Converter(I'm on a tight budget), what exactly is a "bung" and how can I add that to my cat?
its the threaded thing the o2 screws into. you have to drill a hole and weld the bung over it so the o2 sensor is in the stream. I have never personally done it but always have a shop do it because I don't have a bit larger enough for the hole
No e30s again.
Here is a picture from Realoem that shows where the O2 sensor goes.
Notes
No. Description Supp. Qty From Up To Part Number Price Notes 01 Exhaust pipe, catalytic converter 1 09/1987 11761711822 $1866.23 02 Hex nut M10 6 18301737774 $1.65 03 Gasket Asbestos Free 2 11761711717 $18.37 04 Bracket exhaust pipe 1 09/1987 18301716424 $27.70 05 Hex bolt M8X20-ZNS 2 07119901120 $0.60 ENDED 05 Hex bolt M8X20-ZNNIV SI 2 07119903039 06 Washer A8,4 2 33311108205 $0.16 07 Hex bolt with washer M8X25-SB-Z1 1 07119915171 ENDED 12 Oxygen sensor 3-POL/520MM 1 11781286638 $267.20 ENDED 12 Oxygen sensor L=1790MM 1 11781716156 $218.18 13 Cable LAMBDASONDE 1 12511288223 $19.41 14 Bracket 1 12521289423 $2.41 15 Holder D = 13MM 1 61131371074 $2.52 16 Protection plate 1 11781710590 $33.49 ENDED, +core
- ENDED = the part has been discontinued (no longer available).
- +core = plus core charge (possibility of a return of the old part)
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Last edited by aaverhulst; 10-23-2018 at 09:37 AM.
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