How to test,remove and install Coolant Level Sensor and Coolant Temperature Sensor in cooling system on BMW 330i?

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 330i Coolant Temperature Sensor

Coolant Water Temperature Sensor

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5 Coolant Temperature Sensors found

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BMW 330i Coolant Temperature Sensor
Part Number: 13621433077
$46.66 MSRP: $66.05
You Save: $19.39 (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 330i | Sedan(E46), Sedan(E90)
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BMW 330i Temperature Sensor Water/Oil
Part Number: 13621433076
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Temperature sensor water/oil
- Replaces: 23-01-7-838-935
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW 330i | Sedan(E46), Sedan(E90)
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BMW 330i Temperature Sensor Water/Oil
Part Number: 13627580635
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature sensor water/oil
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2017-2024 BMW 330i | 4 Cyl 2.0 L GAS, Sedan(F30), Sedan(G20)
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BMW 330i Cylinder Head Temperature Sensor
Part Number: 13628649765
$46.66 MSRP: $66.05
You Save: $19.39 (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:
- 2017-2018 BMW 330i | Sedan(F30)
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BMW 330i Coolant Temperature Sensor
Part Number: 13628650714
$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; AC Temperature Sensor, Temperature Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2022 BMW 330i | 4 Cyl 2.0 L GAS, Sedan(G20)

BMW 330i Coolant Temperature Sensor

The BMW 330i Coolant Temperature Sensor constantly tracks coolant heat so the engine computer can set ideal fuel mix, ignition timing and fan operation. Seated directly in a coolant passage, this Coolant Temperature Sensor faces the flowing antifreeze, letting its NTC thermistor vary resistance as temperature climbs, and the BMW ECM interprets the return voltage from its five volt reference to decide injector pulse width, idle speed and when to trigger the electric fan relay. Earlier 330i versions also carried a simpler coolant temperature switch that only supplied an on or off ground to start devices like an intake heater plate, whereas current 330i models favor the full-range Coolant Temperature Sensor that delivers continuous data for finer control. The key difference lies in output, a mere binary signal versus a smooth spectrum that allows BMW efficiency systems and emissions equipment to engage only when the motor is truly warm. If the Coolant Temperature Sensor fails, the BMW control unit reverts to limp values, wasting fuel and risking overheating, so keeping this Coolant Temperature Sensor healthy is vital to every spirited BMW 330i drive.

If you are looking for OEM BMW 330i 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 330i Coolant Temperature Sensor that come backed by the manufacturer's warranty.

BMW 330i 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 330i?
Posted by Chuck J.
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 / May 02, 2023