How to test,remove and install Coolant Level Sensor and Coolant Temperature Sensor in cooling system on BMW 325i?

A BMW dealer or specialist should test the radiator outlet thermostatic switch, located in the radiator lower hose. It should only be removed when the engine and radiator are cold. Disconnect the battery cable before removing the switch and use a plug to prevent foreign matter from entering the radiator. The coolant temperature sensor is on the cylinder head's front side. Remove the air intake duct and disconnect the wiring before unscrewing the sensor. Apply sealant to the threads before reinstallation. The coolant level sensor is in the coolant expansion tank base. Disconnect the electrical connector and remove the bolts to access the sensor. Rotate it counterclockwise for removal. Installation is the reverse of removal.

Genuine BMW 325i Coolant Temperature Sensor

Coolant Water Temperature Sensor

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Series

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

13 Coolant Temperature Sensors found

View related parts
BMW 325i Coolant Temperature Sensor
Part Number: 13621433077
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sensor, Coolant; Temperature Sending Unit, Temperature Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW 325i | Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E46), Sedan(E90), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
View related parts
BMW 325i Temperature Sensor Water/Oil
Part Number: 13621433076
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: 23-01-7-838-935
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW 325i | Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E46), Sedan(E90), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 62110788115
$43.02 MSRP: $50.46
You Save: $7.44 (15%)
ADD TO CART
Product Specifications
- Replaced by: 62111268355
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
View related parts
BMW 325i Water Temperature Sensor
Part Number: 13621709967
$64.10 MSRP: $82.23
You Save: $18.13 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sensor, Water
- Replaces: 13-62-1-709-966, 13-62-1-284-397
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Double Temperature Switch
Part Number: 61318363677
$83.23 MSRP: $108.55
You Save: $25.32 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Switch
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Double Temperature Switch
Part Number: 61311378073
$86.57 MSRP: $122.47
You Save: $35.90 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Switch
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1995 BMW 325i | Convertible(E30), Convertible(E36), Coupe(E30), Sedan(E30), Sedan(E36)
View related parts
BMW 325i Temperature Sensor
Part Number: 13621709966
$64.10 MSRP: $82.23
You Save: $18.13 (23%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: 13621709967
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 62111268355
$43.02 MSRP: $50.46
You Save: $7.44 (15%)
ADD TO CART
Product Specifications
- Other Name: Temperature Switch
- Replaces: 62-11-0-788-115, 62-11-1-274-672
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 12621710535
$45.96 MSRP: $58.95
You Save: $12.99 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Sedan(E36)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 12621710511
$45.96 MSRP: $58.95
You Save: $12.99 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit, Temperature Switch
- Replaces: 12-62-1-710-512
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 12621710512
$45.96 MSRP: $58.95
You Save: $12.99 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 12621710511
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)
View related parts
BMW 325i Remote Thermometre Sending Unit
Part Number: 12621747281
Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1992-1995 BMW 325i | Convertible(E36), Sedan(E36)
View related parts
BMW 325i Coolant Temperature Sensor
Part Number: 13621357414
Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1987-1992 BMW 325i | Convertible(E30), Coupe(E30), Sedan(E30)

BMW 325i Coolant Temperature Sensor

The BMW 325i Coolant Temperature Sensor provides the engine control module with precise real time coolant heat readings, enabling accurate fuel delivery, spark timing, idle speed and fan activation so the motor warms quickly without risking overheating. Threaded directly into a coolant passage, this thermistor based Coolant Temperature Sensor changes resistance as temperatures rise, the ECM sends a five volt reference and computes temperature from the returning voltage, then adjusts injector pulse width for richer cold starts and leaner hot running, lifts idle to avoid stalling, and only engages systems like EGR or torque converter lockup once the block is truly warm. Early 325i models in the BMW lineup sometimes relied on basic coolant switches that merely closed a circuit until a set threshold, useful for shutting off the early fuel evaporation grid, while later 325i cars adopted the continuously variable Coolant Temperature Sensor that feeds a steady stream of data to digital gauges. Today's BMW engines still employ this Coolant Temperature Sensor, backed by relays that allow high current fans to operate safely, and every 325i benefits from the same thermistor principle, making the Coolant Temperature Sensor a small but essential guardian of BMW reliability.

If you are looking for OEM BMW 325i Coolant Temperature Sensor, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW 325i Coolant Temperature Sensor that come backed by the manufacturer's warranty.

BMW 325i Coolant Temperature Sensor Parts Questions & Experts Answers

Coolant Temperature Sensor
13621433077
Q:
How to test,remove and install Coolant Level Sensor and Coolant Temperature Sensor in cooling system on BMW 325i?
Posted by Jurie D.
A:
A BMW dealer or specialist should test the radiator outlet thermostatic switch, located in the radiator lower hose. It should only be removed when the engine and radiator are cold. Disconnect the battery cable before removing the switch and use a plug to prevent foreign matter from entering the radiator. The coolant temperature sensor is on the cylinder head's front side. Remove the air intake duct and disconnect the wiring before unscrewing the sensor. Apply sealant to the threads before reinstallation. The coolant level sensor is in the coolant expansion tank base. Disconnect the electrical connector and remove the bolts to access the sensor. Rotate it counterclockwise for removal. Installation is the reverse of removal.
Answered by BMW Parts Specialist Chaz / Mar 19, 2023