How to replace coolant temperature sensors in the thermostat housing on 1999 Volvo S70?

The coolant temperature sensor located in the thermostat housing communicates engine temperature to the management system and gauge. A code is logged in the ECU by a fault which is accessible via a diagnostic connector. In order to replace the sensor, drain coolant, disconnect hoses and follow specific steps to install the sensor, including proper sealing and connections.

Genuine 1999 Volvo S70 Coolant Temperature Sensors

Coolant Temperature Sensor

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1999 Volvo S70 Temperature Sensor Part Number: 9445153
$37.42 MSRP: $43.82
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Product Specifications
- Other Name: IAT Sensor; Air Charge Temp; Coolant Temp Sensor; Temperature Sensor
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 9445153
- Warranty: This genuine part is guaranteed by Volvo's factory warranty.
Fits the following 1999 Volvo S70 Submodels:
- AWD, Base, GLT, GLT SE, T5 | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS

1999 Volvo S70 Coolant Temperature Sensors Parts and Q&A

Q: How to replace coolant temperature sensors in the thermostat housing on 1999 Volvo S70?
A: The coolant temperature sensor located in the thermostat housing communicates engine temperature to the management system and gauge. A code is logged in the ECU by a fault which is accessible via a diagnostic connector. In order to replace the sensor, drain coolant, disconnect hoses and follow specific steps to install the sensor, including proper sealing and connections.