What is the role and significance of the coolant temperature sensor in engine operation on BMW 335i?

The engine coolant temperature (ECT) sensor is a negative temperature coefficient (NTC) sensor, where resistance decreases as coolant temperature rises. The ECM adjusts ignition timing and air/fuel mixture based on the coolant temperature, receiving a 5-volt reference voltage, with the voltage drop across the sensor changing as the coolant temperature varies. If the ECT sensor input is faulty or implausible, the MIL illuminates when specific fault criteria are exceeded, prompting the ECM to assume a substitute value of 80°C (176°F) to ensure engine operation, while setting ignition timing to a conservative basic level. The ECT sensor is positioned in the left front of the engine near the oil filter housing. To disconnect the ECT sensor, ensure the engine is fully cooled, then remove the connector and unscrew the sensor from the cylinder head, being prepared to catch a small amount of coolant. Installation follows the reverse process, using a new copper sealing washer and replacing any lost coolant.

What is the function and replacement process of the coolant temperature sensor in the engine of a six cylinder BMW X3?

The engine coolant temperature (ECT) sensor is an NTC (negative temperature coefficient) sensor, which means that as the coolant temperature rises, the resistance through the sensor decreases. The ECM adjusts ignition timing and air/fuel mixture based on the engine coolant temperature, receiving a 5-volt reference voltage. The voltage drop across the sensor changes with variations in coolant temperature and sensor resistance. If the ECT sensor input is faulty or implausible, the MIL illuminates when OBD II fault criteria are exceeded, prompting the ECM to assume a substitute value of 80 degrees Celsius/176 degrees Fahrenheit to maintain engine operation, with ignition timing set to a conservative basic setting. The ECT sensor is located at the left front of the engine near the oil cooler. To replace it, ensure the engine is fully cooled, then disconnect the ECT sensor connector and unscrew the sensor from the cylinder head, being prepared to catch a small amount of coolant. Installation involves reversing the removal process, using a new copper sealing washer, and replacing any lost coolant. After reinstalling, check and clear fault codes from the ECM memory.

What is the function and installation process of the coolant temperature sensor on the BMW X5?

The engine coolant temperature (ECT) sensor, also known as the dual temperature sensor, signals coolant temperature to the DME system and the instrument cluster temperature gauge. To access the sensor, work on the left side of the coolant pump assembly, which is located in front of the throttle housing, and detach the electrical connector. Ensure the engine is fully cooled off before removing the sensor. It is important to catch any dripping coolant with shop towels to prevent it from dripping onto engine accessory belts. Before reinstalling, replace the sensor sealing O-ring and check for DTCs, clearing and resetting the ECM memory as needed.

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35 Coolant Temperature Sensors found

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BMW 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
Fits the following BMW Models:
- 128i | 2008-2013 | Convertible N51 Engine(E88), Coupe N51 Engine(E82)
- 228i | 2014-2016 | Convertible N26 Engine(F23), Coupe N26 Engine(F22), N26 Engine(F22)
- 228i xDrive | 2015-2016 | Convertible N26 Engine(F23), Coupe N26 Engine(F22)
- 320i | 2001-2005 | Sedan(E46)
- 323Ci | 2000 | Convertible(E46), Coupe(E46)
- 323i | 2006, 1999-2000 | Sedan(E46), Sedan(E90), Wagon(E46)
- 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe M56 Engine(E46), Coupe(E46)
- 325i | 2001-2006 | Sedan M54 Engine(E46), Sedan M56 Engine(E46), Sedan(E46), Sedan(E90), Wagon M54 Engine(E46), Wagon M56 Engine(E46), Wagon(E46)
- 325xi | 2001-2006 | Sedan(E46), Sedan(E90), Wagon(E46), Wagon(E91)
- 328Ci | 2000 | Coupe(E46)
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BMW 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
- Replaces: 23-01-7-838-935
Fits the following BMW Models:
- 1 Series M | 2011 | Coupe(E82)
- 128i | 2008-2013 | Convertible N51 Engine(E88), Convertible N52 Engine(E88), Coupe N51 Engine(E82), Coupe N52 Engine(E82)
- 135i | 2008-2013 | Convertible N54 Engine(E88), Convertible N55 Engine(E88), Convertible(E88), Coupe N54 Engine(E82), Coupe N55 Engine(E82), Coupe(E82)
- 228i | 2014-2016 | Convertible N20 Engine(F23), Convertible N26 Engine(F23), Coupe N20 Engine(F22), Coupe N26 Engine(F22), N20 Engine(F22), N26 Engine(F22)
- 228i xDrive | 2015-2016 | Convertible N20 Engine(F23), Convertible N26 Engine(F23), Coupe N20 Engine(F22), Coupe N26 Engine(F22)
- 320i | 2013-2018, 2001-2005 | Sedan(E46), Sedan(F30)
- 320i xDrive | 2013-2018 | Sedan(F30)
- 323Ci | 2000 | Convertible(E46), Coupe(E46)
- 323i | 2006-2011, 1999-2000 | Sedan(E46), Sedan(E90), Wagon(E46)
- 325Ci | 2001-2006 | Convertible(E46), Coupe M54 Engine(E46), Coupe M56 Engine(E46), Coupe(E46)
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BMW Temperature Sensor Water/Oil
Part Number: 13627580635
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 135i | 2010-2013 | Convertible N55 Engine(E88), Convertible(E88), Coupe N55 Engine(E82), Coupe(E82)
- 228i Gran Coupe | 2021-2024 | 4 Cyl 2.0 L GAS
- 228i xDrive Gran Coupe | 2020-2024 | 4 Cyl 2.0 L GAS, F44
- 230i | 2017-2020 | Convertible(F23), Coupe(F22)
- 230i xDrive | 2017-2020 | Convertible(F23), Coupe(F22)
- 330e | 2021-2024, 2016-2018 | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), Sedan(F30)
- 330e xDrive | 2021-2024 | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- 330i | 2017-2024 | 4 Cyl 2.0 L GAS, Sedan(F30), Sedan(G20)
- 330i GT xDrive | 2017-2019 | F34
- 330i xDrive | 2017-2024 | 4 Cyl 2.0 L GAS, Sedan(F30), Sedan(G20), Wagon(F31)
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BMW 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
Fits the following BMW Models:
- 230i | 2017-2020 | Convertible(F23), Coupe(F22)
- 230i xDrive | 2017-2020 | Convertible(F23), Coupe(F22)
- 330e | 2016-2018 | Sedan(F30)
- 330i | 2017-2018 | Sedan(F30)
- 330i GT xDrive | 2017-2019 | F34
- 330i xDrive | 2017-2019 | Sedan(F30), Wagon(F31)
- 340i | 2016-2018 | Sedan(F30)
- 340i GT xDrive | 2017-2019 | F34
- 340i xDrive | 2016-2018 | Sedan(F30)
- 430i | 2017-2020 | Convertible(F33), Coupe(F32)
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BMW Coolant Temperature Sensor
Part Number: 13627797957
$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
Fits the following BMW Models:
- 328d | 2014-2018 | Sedan(F30)
- 328d xDrive | 2014-2018 | Sedan(F30), Wagon(F31)
- 535d | 2014-2016 | Sedan(F10)
- 535d xDrive | 2014-2016 | Sedan(F10)
- 540d xDrive | 2018 | Sedan(G30)
- 740Ld xDrive | 2015 | Sedan(F02)
- X3 | 2015-2017 | xDrive28d(F25)
- X5 | 2014-2018 | xDrive35d(F15)
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BMW Remote Thermometre Sending Unit
Part Number: 62110788115
$43.02 MSRP: $50.46
You Save: $7.44 (15%)
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Product Specifications
- Replaced by: 62111268355
Fits the following BMW Models:
- 1602 | 1967-1971
- 2002 | 1968-1976
- 2002tii | 1971-1974
- 2500 | 1969-1970
- 2800 | 1969-1970
- 2800CS | 1969-1971
- 3.0CS | 1971-1974
- 3.0S | 1973-1974
- 3.0Si | 1975-1976
- 320i | 1977-1983 | Sedan(E21)
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BMW 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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Fits the following BMW Models:
- 318i | 1996-1998 | Convertible(E36), Sedan(E36)
- 318is | 1996-1999 | Coupe(E36)
- 318ti | 1996-1999 | Hatchback(E36)
- 323i | 1998-1999 | Convertible(E36)
- 323is | 1998-1999 | Coupe(E36)
- 328i | 1996-1999 | Convertible(E36), Sedan(E36)
- 328is | 1996-1999 | Coupe(E36)
- 525i | 2001-2003 | Sedan(E39), Wagon(E39)
- 528i | 1997-2000 | Sedan(E39), Wagon(E39)
- 530i | 2001-2003 | Sedan(E39)
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BMW Water Temperature Sensor
Part Number: 13621709967
$64.10 MSRP: $82.23
You Save: $18.13 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Temperature Sensor, Water
- Replaces: 13-62-1-709-966, 13-62-1-284-397
Fits the following BMW Models:
- 318i | 1991-1996, 1984-1985 | Convertible(E30), Convertible(E36), Coupe(E30), Sedan(E30), Sedan(E36)
- 318is | 1991-1995 | Coupe(E30), Coupe(E36)
- 318ti | 1995 | Hatchback(E36)
- 325e | 1984-1987 | Coupe(E30), Sedan(E30)
- 325i | 1992-1995 | Convertible(E36), Sedan(E36)
- 325is | 1991-1995 | Coupe(E36)
- 525i | 1989-1995 | M20 Engine(E34), M50 Engine(E34), Sedan(E34), Wagon(E34)
- 525iT | 1993 | Wagon(E34)
- 528e | 1982-1988 | Sedan(E28)
- 535i | 1985-1993 | Sedan(E28), Sedan(E34)
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BMW Water Temperature Sensor
Part Number: 13621707366
$181.31 MSRP: $240.48
You Save: $59.17 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Temperature Sensor, Water; Coolant Temperature Sensor
Fits the following BMW Models:
- 750iL | 1988-1994 | Sedan(E32)
- 850CSi | 1994-1995 | Coupe(E31)
- 850Ci | 1993-1994 | Coupe(E31)
- 850i | 1991-1992 | Coupe(E31)
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BMW 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
Fits the following BMW Models:
- 323i | 1998-1999 | Convertible(E36)
- 323is | 1998-1999 | Coupe(E36)
- 325i | 1992-1995 | Convertible(E36), Sedan(E36)
- 325is | 1991-1995 | Coupe(E36)
- 328i | 1996-1999 | Convertible(E36), Sedan(E36)
- 328is | 1996-1999 | Coupe(E36)
- M3 | 1995-1999 | Convertible(E36), Coupe(E36), Sedan(E36)
- Z3 | 1997-2002 | 2.8L Engine(E36), Coupe(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36)
- Z3 M | 1998-2002 | Coupe(E36), Roadster(E36)
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BMW 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
Fits the following BMW Models:
- 318i | 1991-1998 | Convertible(E30), Convertible(E36), Sedan(E30), Sedan(E36)
- 318is | 1991-1999 | Coupe(E30), Coupe(E36)
- 318ti | 1995 | Hatchback(E36)
- 320i | 1993-1995 | Sedan(E36)
- 325e | 1984-1987 | Coupe(E30), Sedan(E30)
- 325i | 1987-1995 | Convertible(E30), Convertible(E36), Coupe(E30), Sedan(E30), Sedan(E36)
- 325is | 1987-1995 | Coupe(E30), Coupe(E36)
- 325ix | 1988-1991 | Coupe(E30), Sedan(E30)
- 525i | 1989-1995 | M20 Engine(E34), M50 Engine(E34), Sedan(E34), Wagon(E34)
- 525iT | 1993 | Wagon(E34)
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BMW Double Temperature Switch
Part Number: 61318360857
$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
Fits the following BMW Models:
- 528i | 1997-2000 | Sedan(E39)
- 540i | 1997-2003 | Sedan(E39)
- 740i | 1997-2001, 1995 | Sedan(E38)
- 740iL | 1995-2001 | Sedan(E38)
- 750iL | 1995-1998 | Sedan(E38)
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BMW 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
Fits the following BMW Models:
- 318i | 1991-1996, 1984-1985 | Convertible(E30), Convertible(E36), Coupe(E30), Sedan(E30), Sedan(E36)
- 318is | 1991-1995 | Coupe(E30), Coupe(E36)
- 318ti | 1995 | Hatchback(E36)
- 325e | 1984-1987 | Coupe(E30), Sedan(E30)
- 325i | 1992-1995 | Convertible(E36), Sedan(E36)
- 325is | 1991-1995 | Coupe(E36)
- 525i | 1989-1995 | M20 Engine(E34), M50 Engine(E34), Sedan(E34), Wagon(E34)
- 525iT | 1993 | Wagon(E34)
- 528e | 1982-1988 | Sedan(E28)
- 535i | 1985-1993 | Sedan(E28), Sedan(E34)
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BMW 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
Fits the following BMW Models:
- 1602 | 1967-1971
- 2002 | 1968-1976
- 2002tii | 1971-1974
- 2500 | 1969-1970
- 2800 | 1969-1970
- 2800CS | 1969-1971
- 3.0CS | 1971-1974
- 3.0S | 1973-1974
- 3.0Si | 1975-1976
- 320i | 1977-1983 | Sedan(E21)
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BMW Temperature Sensor
Part Number: 61277639893
$50.97 MSRP: $67.50
You Save: $16.53 (25%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- X5 | 2016-2018 | xDrive40e(F15)
- i3 | 2014-2021 | 2 Cyl 0.6 L BATTERY W/RANGE EXT (BEV REX), BATTERY EV (EV/BEV), Base(I01), Range Extender(I01)
- i3s | 2018-2021 | 2 Cyl 0.6 L BATTERY W/RANGE EXT (BEV REX), BATTERY EV (EV/BEV), Base(I01), Range Extender(I01)
- i8 | 2014-2017 | Coupe(I12)
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BMW TEMPERATURE SENSOR, COOLANT
Part Number: 13625A115F5
$46.66 MSRP: $66.05
You Save: $19.39 (30%)
Ships in 1-3 Business Days
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Fits the following BMW Models:
- 530i | 2024-2025 | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- 530i xDrive | 2024-2025 | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- 540i xDrive | 2024-2025 | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- 550e xDrive | 2025 | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- 740i | 2024 | 6 Cyl 3.0 L GAS
- 750e xDrive | 2024 | 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- 760i xDrive | 2023-2024 | 8 Cyl 4.4 L MILD HYBRID EV-GAS (MHEV)
- M5 | 2025 | 8 Cyl 4.4 L PLUG-IN HYBRID EV-GAS (PHEV)
- X3 | 2025 | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
- X5 | 2024 | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV), 8 Cyl 4.4 L MILD HYBRID EV-GAS (MHEV)
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BMW Double Temperature Switch
Part Number: 61318361787
$92.19 MSRP: $120.23
You Save: $28.04 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Switch
Fits the following BMW Models:
- 318i | 1996-1998 | Sedan(E36)
- 318ti | 1995-1999 | Hatchback(E36)
- Z3 | 1996-1998 | 1.9L Engine(E36), Roadster 1.9L(E36), Roadster(E36)
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BMW Double Temperature Switch
Part Number: 61318376440
$92.19 MSRP: $120.23
You Save: $28.04 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Switch
Fits the following BMW Models:
- 318i | 1996-1998 | Sedan(E36)
- 318ti | 1996-1999 | Hatchback(E36)
- Z3 | 1996-1998 | 1.9L Engine(E36), Roadster 1.9L(E36), Roadster(E36)
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BMW Water Temperature Sensor
Part Number: 12621288158
$64.47 MSRP: $82.70
You Save: $18.23 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sensor, Water; Coolant Temperature Sensor, Temperature Sensor
Fits the following BMW Models:
- 524td | 1985-1986 | Sedan(E28)
- 530i | 1994-1995 | Sedan(E34), Wagon(E34)
- 535i | 1989-1993 | Sedan(E34)
- 540i | 1994-1995 | Sedan(E34)
- 735i | 1987-1992 | Sedan(E32)
- 735iL | 1988-1992 | Sedan(E32)
- 740i | 1997-2001, 1993-1995 | Sedan(E32), Sedan(E38)
- 740iL | 1993-2001 | Sedan(E32), Sedan(E38)
- 750iL | 1988-1994 | Sedan(E32)
- 840Ci | 1994-1995 | Coupe(E31)
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BMW Remote Thermometre Sending Unit
Part Number: 12621710511
$48.20 MSRP: $58.19
You Save: $9.99 (18%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit, Temperature Switch
- Replaces: 12-62-1-710-512
Fits the following BMW Models:
- 318i | 1991-1992 | Convertible(E30), Sedan(E30)
- 318is | 1991 | Coupe(E30)
- 325e | 1984-1987 | Coupe(E30), Sedan(E30)
- 325i | 1987-1992 | Convertible(E30), Coupe(E30), Sedan(E30)
- 325is | 1987-1990 | Coupe(E30)
- 325ix | 1988-1991 | Coupe(E30), Sedan(E30)
- 528e | 1982-1988 | Sedan(E28)
- 533i | 1983-1984 | Sedan(E28)
- M3 | 1988-1991 | Coupe(E30)
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1-20 of 35 Results

BMW Coolant Temperature Sensor

The coolant temperature sensor, as the name shows, is used to indicate the temperature of the coolant in the car. The reason for the exiting of the coolant temperature sensor is for engine running in a proper temperature range. There is a coolant temperature sensor gauge on the instrument panel in your car, and if the indicator shows blue, it's safe. Otherwise, it is overheating. Since the coolant temperature sensor is closely related to the engine working, and the engine will overheating with a malfunctioning sensor. You need to pay more attention on it, and do the regular maintenance. However, the number of the coolant temperature sensor depends, so make sure to read the owner's manual for your BMW car and make a decision. We, with the confidence, are glad to be your first choice and we offer you all BMW genuine OEM coolant temperature sensor with a discounted price.

BMW Coolant Temperature Sensor Parts Questions & Experts Answers

Temperature Sensor Water/Oil
13621433076
Q: What is the role and significance of the coolant temperature sensor in engine operation on BMW 335i?
A:
The engine coolant temperature (ECT) sensor is a negative temperature coefficient (NTC) sensor, where resistance decreases as coolant temperature rises. The ECM adjusts ignition timing and air/fuel mixture based on the coolant temperature, receiving a 5-volt reference voltage, with the voltage drop across the sensor changing as the coolant temperature varies. If the ECT sensor input is faulty or implausible, the MIL illuminates when specific fault criteria are exceeded, prompting the ECM to assume a substitute value of 80°C (176°F) to ensure engine operation, while setting ignition timing to a conservative basic level. The ECT sensor is positioned in the left front of the engine near the oil filter housing. To disconnect the ECT sensor, ensure the engine is fully cooled, then remove the connector and unscrew the sensor from the cylinder head, being prepared to catch a small amount of coolant. Installation follows the reverse process, using a new copper sealing washer and replacing any lost coolant.
Coolant Temperature Sensor
13621433077
Q: What is the function and replacement process of the coolant temperature sensor in the engine of a six cylinder BMW X3?
A:
The engine coolant temperature (ECT) sensor is an NTC (negative temperature coefficient) sensor, which means that as the coolant temperature rises, the resistance through the sensor decreases. The ECM adjusts ignition timing and air/fuel mixture based on the engine coolant temperature, receiving a 5-volt reference voltage. The voltage drop across the sensor changes with variations in coolant temperature and sensor resistance. If the ECT sensor input is faulty or implausible, the MIL illuminates when OBD II fault criteria are exceeded, prompting the ECM to assume a substitute value of 80 degrees Celsius/176 degrees Fahrenheit to maintain engine operation, with ignition timing set to a conservative basic setting. The ECT sensor is located at the left front of the engine near the oil cooler. To replace it, ensure the engine is fully cooled, then disconnect the ECT sensor connector and unscrew the sensor from the cylinder head, being prepared to catch a small amount of coolant. Installation involves reversing the removal process, using a new copper sealing washer, and replacing any lost coolant. After reinstalling, check and clear fault codes from the ECM memory.
Double Temperature Switch
13621703993
Q: What is the function and installation process of the coolant temperature sensor on the BMW X5?
A:
The engine coolant temperature (ECT) sensor, also known as the dual temperature sensor, signals coolant temperature to the DME system and the instrument cluster temperature gauge. To access the sensor, work on the left side of the coolant pump assembly, which is located in front of the throttle housing, and detach the electrical connector. Ensure the engine is fully cooled off before removing the sensor. It is important to catch any dripping coolant with shop towels to prevent it from dripping onto engine accessory belts. Before reinstalling, replace the sensor sealing O-ring and check for DTCs, clearing and resetting the ECM memory as needed.

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