Z4 E85 Transmission Speed Sensor

Justinn819 · 05-28-2023, 08:44 PM

Hey y'all! This is my first time posting to this forum, and I've got quite the issue with my 2003 BMW Z4 3.0i. It was running just fine this morning when suddenly I started it up and it wouldn't move. Transmission light flicked on, so I grabbed my OBDII scanner from the trunk. Got codes 21 Turbine Speed Sensor P0175 in addition to 31 Gear monitoring. Was trying to research this issue and came across the automatic transmission speed sensor, part number 24341423874, attached. Apparently the code in addition to the speedometer not working properly relate to this part failing. So I jacked up the car and took a look around but I can't find it anywhere. I was wondering if somebody could share a picture or video of where this part is so I can find it, as well as any additional information in regards to getting the vehicle moving again. Thanks!

GuidoK · 05-29-2023, 06:40 AM

That sensor sits inside the automatic transmission.
You have to remove the oilpan, fluid filter and valvebody to get to it.

There's also a pulse sensor for the outgoing speed (this one is for the ingoing speed), might be sensible to change that too while you're in there.

Justinn819 · 05-29-2023, 06:43 AM

Thanks! I was actually going to go change the transmission fluid anyway so I guess it makes sense to do it all at once. Do you have a link to the sensor for the outgoing speed?

GuidoK · 05-29-2023, 06:52 AM

http://bmwfans.info/parts-catalog/E8...lse_generator/

Sensor #8

Steeler · 05-29-2023, 06:59 AM

Realoem is a great source.
Good luck with your fix.

https://www.realoem.com/bmw/enUS/sho...diagId=24_0893

05-28-2023, 08:44 PM	#1
Justinn819 Registered 0 Rep 2 Posts Drives: 2003 BMW Z4 3.0i Join Date: May 2023 Location: Georgia iTrader: (0)	Z4 E85 Transmission Speed Sensor Hey y'all! This is my first time posting to this forum, and I've got quite the issue with my 2003 BMW Z4 3.0i. It was running just fine this morning when suddenly I started it up and it wouldn't move. Transmission light flicked on, so I grabbed my OBDII scanner from the trunk. Got codes 21 Turbine Speed Sensor P0175 in addition to 31 Gear monitoring. Was trying to research this issue and came across the automatic transmission speed sensor, part number 24341423874, attached. Apparently the code in addition to the speedometer not working properly relate to this part failing. So I jacked up the car and took a look around but I can't find it anywhere. I was wondering if somebody could share a picture or video of where this part is so I can find it, as well as any additional information in regards to getting the vehicle moving again. Thanks! Attached Images
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05-29-2023, 06:40 AM	#2
GuidoK #buildnotbought 10847 Rep 4,892 Posts Drives: Z4 3.0i ESS TS2+ Join Date: Jul 2012 Location: Tinkering in the garage iTrader: (0)	That sensor sits inside the automatic transmission. You have to remove the oilpan, fluid filter and valvebody to get to it. There's also a pulse sensor for the outgoing speed (this one is for the ingoing speed), might be sensible to change that too while you're in there. __________________ Z4 3.0i \| ESS TS2+ supercharger \| Quaife ATB LSD \| Brembo/BMW performance BBK front/rear \| Schrick FI cams \| Schmiedmann headers+cats \| Powerflex/strongflex PU bushings \| Vibra-technics engine mounts \| H&R anti rollbars \| KW V3 coilovers/KW camber plates \| Sachs race engineering clutch \| tons of custom sh#t
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05-29-2023, 06:43 AM	#3
Justinn819 Registered 0 Rep 2 Posts Drives: 2003 BMW Z4 3.0i Join Date: May 2023 Location: Georgia iTrader: (0)	Thanks! I was actually going to go change the transmission fluid anyway so I guess it makes sense to do it all at once. Do you have a link to the sensor for the outgoing speed?
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05-29-2023, 06:52 AM	#4
GuidoK #buildnotbought 10847 Rep 4,892 Posts Drives: Z4 3.0i ESS TS2+ Join Date: Jul 2012 Location: Tinkering in the garage iTrader: (0)	http://bmwfans.info/parts-catalog/E8...lse_generator/ Sensor #8 __________________ Z4 3.0i \| ESS TS2+ supercharger \| Quaife ATB LSD \| Brembo/BMW performance BBK front/rear \| Schrick FI cams \| Schmiedmann headers+cats \| Powerflex/strongflex PU bushings \| Vibra-technics engine mounts \| H&R anti rollbars \| KW V3 coilovers/KW camber plates \| Sachs race engineering clutch \| tons of custom sh#t
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