What is the purpose of the Engine Coolant Temperature (ECT) sensor on BMW M3?

The Engine Coolant Temperature (ECT) sensor is a Negative Temperature Coefficient (NTC) type sensor that measures the temperature of the engine coolant. As the temperature increases, the electrical resistance of the sensor decreases. The Engine Control Module (ECM) constantly monitors the value received from the ECT sensor to determine the engine's fuel mixture requirements. This information is used to maintain good driveability from a cold start up to normal operating temperature. The ECM controls the fuel mixture by controlling the activation of the fuel injectors. To test the ECT sensor, use a BMW service tester or a suitable Data Scan Tool (OST) to check for faults and read the values of the components. If this equipment is not available, you can proceed with the following steps. First, unplug the sensor and measure the coolant temperature as close as possible to the sensor location. Then, measure the resistance between the terminals of the sensor and compare the results to a chart. With the ignition switch ON, the sensor should receive 5 volts at one of the connector terminals. The other terminal is the return signal to the control unit and should not be used for voltmeter ground. To remove and install the ECT sensor, follow the specific instructions for your engine model. It is important to allow the engine to cool before removing the sensor to avoid burns. Unplug the electrical connector, use a 12 point 22mm thin wall deep well socket to remove the sensor by turning it counterclockwise. Remove the sensor along with its sealing washer. When installing the sensor, use a new sealing washer and tighten it to 10 ft. lbs. (14 Nm).

Genuine BMW M3 Coolant Temperature Sensor

Coolant Water Temperature Sensor

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11 Coolant Temperature Sensors found

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BMW M3 Temperature Sensor Water/Oil
Part Number: 13621433076
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 23-01-7-838-935
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
- 2008-2013 BMW M3 | Convertible(E93), Coupe(E92), Sedan(E90)
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Coolant Temperature Sensor
Part Number: 13621433077
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-2 Business Days
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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 M3 | Convertible(E46), Coupe(E46)
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BMW M3 Temperature Sensor Water/Oil
Part Number: 13627580635
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
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:
- 2021 BMW M3 | 6 Cyl 3.0 L GAS
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Double Temperature Switch
Part Number: 13621703993
$25.05 MSRP: $32.14
You Save: $7.09 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)
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BMW M3 Double Temperature Switch
Part Number: 61318363677
$83.23 MSRP: $108.55
You Save: $25.32 (24%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Temperature Switch
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)
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BMW M3 Double Temperature Switch
Part Number: 61311378073
$86.57 MSRP: $122.47
You Save: $35.90 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Temperature Switch
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Temperature Sensor
Part Number: 13621709966
$64.12 MSRP: $82.25
You Save: $18.13 (23%)
Ships in 1 Business Day
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Product Specifications
- Replaced by: 13621709967
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Water Temperature Sensor
Part Number: 13621709967
$64.12 MSRP: $82.25
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:
- 1995-1996 BMW M3 | Coupe(E36)
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Remote Thermometre Sending Unit
Part Number: 12621710511
$34.86 MSRP: $44.72
You Save: $9.86 (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:
- 1988-1991 BMW M3 | Coupe(E30)
View related parts
BMW M3 Remote Thermometre Sending Unit
Part Number: 12621710512
$34.86 MSRP: $44.72
You Save: $9.86 (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:
- 1988-1991 BMW M3 | Coupe(E30)
View related parts
BMW M3 Remote Thermometre Sending Unit
Part Number: 12621747281
Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)

BMW M3 Coolant Temperature Sensor

If you are looking for OEM BMW M3 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 M3 Coolant Temperature Sensor that come backed by the manufacturer's warranty.

BMW M3 Coolant Temperature Sensor Parts Questions & Experts Answers

Water Temperature Sensor
13621709967
Q: What is the purpose of the Engine Coolant Temperature (ECT) sensor on BMW M3?
A:
The Engine Coolant Temperature (ECT) sensor is a Negative Temperature Coefficient (NTC) type sensor that measures the temperature of the engine coolant. As the temperature increases, the electrical resistance of the sensor decreases. The Engine Control Module (ECM) constantly monitors the value received from the ECT sensor to determine the engine's fuel mixture requirements. This information is used to maintain good driveability from a cold start up to normal operating temperature. The ECM controls the fuel mixture by controlling the activation of the fuel injectors. To test the ECT sensor, use a BMW service tester or a suitable Data Scan Tool (OST) to check for faults and read the values of the components. If this equipment is not available, you can proceed with the following steps. First, unplug the sensor and measure the coolant temperature as close as possible to the sensor location. Then, measure the resistance between the terminals of the sensor and compare the results to a chart. With the ignition switch ON, the sensor should receive 5 volts at one of the connector terminals. The other terminal is the return signal to the control unit and should not be used for voltmeter ground. To remove and install the ECT sensor, follow the specific instructions for your engine model. It is important to allow the engine to cool before removing the sensor to avoid burns. Unplug the electrical connector, use a 12 point 22mm thin wall deep well socket to remove the sensor by turning it counterclockwise. Remove the sensor along with its sealing washer. When installing the sensor, use a new sealing washer and tighten it to 10 ft. lbs. (14 Nm).

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