What is the function and installation process of the ECT sensor in six cylinder engine on BMW X3?

The ECT sensor is an NTC sensor that decreases resistance as coolant temperature rises. The ECM adjusts ignition timing and air/fuel mixture based on the engine coolant temperature, receiving a 5-volt reference voltage from the sensor, with the voltage drop varying as the temperature changes. If the ECT sensor input is faulty or implausible, the MIL illuminates, prompting the ECM to assume a substitute value of 80 degrees Celsius/176 degrees Fahrenheit to maintain engine operation, while setting ignition timing to a conservatively safe basic level. The ECT sensor is positioned below the cylinder 6 intake port at the rear of the engine, underneath the intake manifold. To access it, the intake manifold must be removed after ensuring the engine is fully cooled. The ECT sensor connector should be disconnected, and the sensor unscrewed from the cylinder head, with precautions taken to catch any small amount of coolant that may escape. Installation follows the reverse order of removal, requiring a new copper sealing washer for the sensor, replacement of any lost coolant, and checking and clearing fault codes from the ECM memory.

Genuine BMW X3 Coolant Temperature Sensor

Coolant Water Temperature Sensor

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BMW X3 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:
- 2004-2017 BMW X3 | 2.5i(E83), 3.0i(E83), 3.0si(E83), sDrive28i(F25), xDrive28i(F25), xDrive35i(F25)
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BMW X3 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:
- 2004-2006 BMW X3 | 2.5i(E83), 3.0i(E83)
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BMW X3 Cylinder Head Temperature Sensor
Part Number: 13628649765
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Temperature Sensor, Cylinder Head; Coolant Temperature Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2018-2019 BMW X3 | M40i(G01), sDrive30i(G01), xDrive30i(G01)
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BMW X3 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:
- 2011-2020 BMW X3 | M40i(G01), sDrive30i(G01), xDrive30e(G01), xDrive30i(G01), xDrive35i(F25)
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BMW X3 Coolant Temperature Sensor
Part Number: 13627823993
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2017 BMW X3 | xDrive28d(F25)
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BMW X3 Coolant Temperature Sensor
Part Number: 13628650714
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sensor, Coolant; AC Temperature Sensor, Temperature Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2020-2023 BMW X3 | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L GAS, 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV), M40i(G01), sDrive30i(G01), xDrive30e(G01), xDrive30i(G01)
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BMW X3 Coolant Temperature Sensor
Part Number: 13627797957
$46.05 MSRP: $65.19
You Save: $19.14 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sensor, Coolant
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2017 BMW X3 | xDrive28d(F25)
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BMW X3 Temperature Sensor
Part Number: 61278647873
$50.33 MSRP: $66.65
You Save: $16.32 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Battery Temperature Sensor, Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2020-2021 BMW X3 | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L GAS, xDrive30e(G01)

BMW X3 Coolant Temperature Sensor

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BMW X3 Coolant Temperature Sensor Parts Questions & Experts Answers

Temperature Sensor Water/Oil
13621433076
Q: What is the function and installation process of the ECT sensor in six cylinder engine on BMW X3?
A:
The ECT sensor is an NTC sensor that decreases resistance as coolant temperature rises. The ECM adjusts ignition timing and air/fuel mixture based on the engine coolant temperature, receiving a 5-volt reference voltage from the sensor, with the voltage drop varying as the temperature changes. If the ECT sensor input is faulty or implausible, the MIL illuminates, prompting the ECM to assume a substitute value of 80 degrees Celsius/176 degrees Fahrenheit to maintain engine operation, while setting ignition timing to a conservatively safe basic level. The ECT sensor is positioned below the cylinder 6 intake port at the rear of the engine, underneath the Intake Manifold. To access it, the intake manifold must be removed after ensuring the engine is fully cooled. The ECT sensor connector should be disconnected, and the sensor unscrewed from the cylinder head, with precautions taken to catch any small amount of coolant that may escape. Installation follows the reverse order of removal, requiring a new copper sealing washer for the sensor, replacement of any lost coolant, and checking and clearing fault codes from the ECM memory.