Coolant Temperature Sensors for BMW 5 Series E34 (1987-1995)

Clear BMW chassis

Please ensure your correct model is selected

Coolant temperature sensors are vital to your cooling system. If you're running a stock cooling system, a non-functional coolant temperature sensor can prevent your fan from flipping on or give you an inaccurate temp reading, preventing you from knowing when your vehicle is running hot. This can be a huge issue in particular if you're tracking your vehicle. Replace yours today!
Sort By:

OEM Bosch Coolant Temperature Sensor - E36 318i 325i M3 1992-1995, E3...
For vehicles with production date up to 10/1992
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:7259
Part#: 13621709967
In Stock
$ 24.23 USD
Free Shipping on orders $49 and up
$ 24.23 USD
Free Shipping on orders $49 and up

To make sure your temperature readings are as accurate as possible, replace your temperature sensor with a high quality OEM Bosch temperature sensor.

OEM replacement for BMW part # 13621709967, 13621709966, and 13621284397. Bosch coolant temperature sensor mounted in the cylinder head on models with the M42, M50 and S50 engines.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


This item fits the following BMWs:
1988-1991 E30 BMW 318i 318is 318ic M3
1992-1995 E36 BMW 318i 318is 318ti 318ic 325i 325is 325ic M3
3/1987-1988 E28 BMW 528e
1985-1988 E28 BMW535i 535is M5
1989-1995 E34 BMW 525i 535i M5
1985-1989 E24 BMW 635csi M6
1984-1987 E23 BMW 735i
1988-1992 E32 BMW 735i 735il

Show More Show Less
Race German Coolant Temperature Sender Adapter - M12x1.5
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Race German - Corporate Logo
T#:6827887
Part#: RGCTSAM12
In Stock
$ 35.99 USD
Free Shipping on orders $49 and up
Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
Show More Show Less
Facet Radiator Fan Switch - E24, E28, E30, E31, E32, E34, E36, Z3 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Facet - Corporate Logo
T#:375144
Part#: 61311378073
Ships in 1 Business Day
$ 44.99 USD
Free Shipping on orders $49 and up
$ 44.99 USD
Free Shipping on orders $49 and up
Measures radiator air temperature enabling the fan to turn off or on

Race German Coolant Temperature Sender Adapter - 1/8NPT
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Race German - Corporate Logo
T#:6827888
Part#: RGCTSA1/8NPT
Ships in 4 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
Show More Show Less

Genuine BMW Coolant Temperature Sensor
For vehicles with production date up to 10/1992 For vehicles with production date from 09/1992
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:376804
Part#: 13621709967
Ships in 1-2 days
7% off MSRP $ 82.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 76.99 USD
Free Shipping
7% off MSRP
$ 82.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 76.99 USD
Free Shipping
Radiator Fan Switch - 91/99 degree - E30 E36 E34 E32 E31 Z3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:4562
Part#: 61311378073
In Stock at Vendor
$ 60.99

This product was last offered at the strikethrough price on
05-07-2026

$ 58.99 USD
Free Shipping on orders $49 and up
$ 58.99 USD
Free Shipping on orders $49 and up
Engine radiator double temperature fan switch, 91/99 degree celsius. This switch is designed to activate the auxiliary fan at the specified temperatures. A faulty switch can lead to the auxiliary fan not activating, causing over heating.
Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self evident in the quality and vast amount of applications they service. With more than 34,000 repair solutions for cars and commercial vehicles you can be sure Febi has you covered.
This item fits the following BMWs:
1987-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1992-1995 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic M3
1989-1995 E34 BMW 525i 530i 535i 540i M5
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
1996-7/1996 Z3 BMW Z3 1.9
1996-5/1997 Z3 BMW Z3 2.8
Show More Show Less

Genuine BMW Water Temperature Sensor
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:367810
Part#: 12621288158
Ships in 1-2 days
8% off MSRP $ 82.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 75.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 82.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 75.99 USD
Free Shipping on orders $49 and up
Coolant Temperature Sensor - E36, E34, E32, E38, E31
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
FAE - Corporate Logo
T#:7172
Part#: 12621747281
In Stock
$ 13.99 USD
Free Shipping
$ 13.99 USD
Free Shipping
This is the engine coolant temperature sensor that is mounted into the cylinder head.

Coolant Temperature Sender
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Facet - Corporate Logo
T#:586992
Part#: 12621747281
In Stock
$ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 19.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up

Radiator Fan Switch Plug - E30, E34, E36, E23, E32
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Race German - Corporate Logo
T#:23947130
Part#: E30RADFANSP
In Stock
$ 17.99 USD
Free Shipping on orders $49 and up
Thanks to its brittle plastic construction, this radiator fan switch plug is a common failure point. Race German offers this high-quality replacement to remedy this issue and get your car back to perfect operation.
Show More Show Less
Water Temperature Sensor
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:372926
Part#: 12621288158
Ships in 1 Business Day
$ 6.99 USD
Free Shipping on orders $49 and up
$ 6.99 USD
Free Shipping on orders $49 and up
Replace the sensor to get your gauge working properly again.
Meistersatz Water Temperature Sensor - E31, E32, E34, E38
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Meistersatz - Corporate Logo
T#:379615
Part#: 12621288158
Ships in 4 Business Days
$ 7.99 USD
Free Shipping on orders $49 and up
$ 7.99 USD
Free Shipping on orders $49 and up
M14x1.5 Thread


Coolant Temperature Sender - 2 Pin
For vehicles with production date from 09/1992
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Meistersatz - Corporate Logo
T#:379619
Part#: 12621747281
Ships in 4 Business Days
$ 8.99 USD
Free Shipping on orders $49 and up
$ 8.99 USD
Free Shipping on orders $49 and up
Water Temperature Sensor
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Beru - Corporate Logo
T#:596874
Part#: 12621288158
Ships in 1-2 days
$ 44.99 USD
Free Shipping on orders $49 and up
$ 44.99 USD
Free Shipping on orders $49 and up
M14x1.5 Thread. Your vehicle is equipped with numerous gauges to allow you to have a better idea of what is going on under the hood. By monitoring these gauges, you can prevent premature engine damage due to low oil pressure or high coolant temperatures. If one isn't functional though, you are in the dark as far as that system goes. One of the most vital is coolant temperature. Replace the sensor to get your gauge working properly again.
Show More Show Less
Hella Coolant Temperature Sender - E31, E32, E34, E36, E38
For vehicles with production date from 09/1992
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hella - Corporate Logo
T#:580139
Part#: 9107471
Ships in 4 Business Days
$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
Free Shipping on orders $49 and up
2 pin

FAE Water Temperature Sensor - E31, E32, E34, E38
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
FAE - Corporate Logo
T#:7171
Part#: 12621288158
Ships on Jun 26, 2026
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
ENGINE ELECTRICAL TEMPERATURE SENSOR, WATER 12621288158

Febi Coolant Temperature Sender - E31, E32, E34, E36, E38
For vehicles with production date from 09/1992
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:382428
Part#: 12621747281
Special Order: No Guaranteed ETA
$ 20.99 USD
Free Shipping on orders $49 and up
$ 20.99 USD
Free Shipping on orders $49 and up
2 pin