How to test and replace Coolant Level Sensor and Coolant Temperature Sensor in cooling system on BMW 328i?

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 328i Coolant Level Sensor

Radiator Tank Switch

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3 Coolant Level Sensors found

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BMW 328i Level Switch, Coolant
Part Number: 17137553919
$23.76 MSRP: $33.64
You Save: $9.88 (30%)

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Product Specifications
- Replaces: 17-11-7-526-845, 17-13-7-524-812, 17-13-7-800-097, 17-11-7-546-548, 17-13-7-532-124
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
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Fits the following Vehicles:
- 2007-2013 BMW 328i | Convertible N51 Engine(E93), Convertible N52 Engine(E93), Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
- 1999-2000 BMW 328i | Sedan(E46)
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BMW 328i Levelling Switch Radiator
Part Number: 61318360855
$69.88 MSRP: $94.05
You Save: $24.17 (26%)

Add to Cart
Product Specifications
- Other Name: Level Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
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Fits the following Vehicles:
- 1996-1999 BMW 328i | Convertible(E36), Sedan(E36)
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BMW 328i Levelling Switch Radiator
Part Number: 61311384739
$56.64 MSRP: $76.23
You Save: $19.59 (26%)

Add to Cart
Product Specifications
- Other Name: Level Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
View More
Fits the following Vehicles:
- 1996-1999 BMW 328i | Convertible(E36), Sedan(E36)

BMW 328i Coolant Level Sensor Parts Questions & Answers

Level Switch, Coolant
17-13-7-553-919
Q: How to test and replace Coolant Level Sensor and Coolant Temperature Sensor in cooling system on BMW 328i?
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.