Q27-6003 Coolant Temperature Sensor
The Q27-6003 is an OE-style coolant temperature sensor engineered for
PACCAR-powered Peterbilt and Kenworth trucks. It provides stable, accurate temperature data to the ECM/cluster so you can
diagnose overheating early, protect the engine, and keep your truck on the road.
Why choose Q27-6003
- Direct replacement: Designed to match the original connector and thread for a clean, hassle-free install.
- Accurate readings: Consistent temperature signal helps maintain optimal fan, gauge, and derate behavior.
- Heavy-duty build: Durable construction for vibration and heat in commercial applications.
- Proven application coverage: Commonly listed for Peterbilt/Kenworth in the PACCAR family.
Typical Applications
- Peterbilt models with PACCAR engines
- Kenworth models with PACCAR engines
Specs & Details
| Part Number | Q27-6003 |
|---|---|
| Type | Engine Coolant Temperature Sensor |
| Connector | 2-pin (verify plug before ordering) |
| Material | Brass body, thread sealant may be pre-applied (varies by supplier) |
| Condition | New replacement (OE-style) |
| Notes | Match connector, thread size, and harness pigtail to your VIN before purchase |
Installation Tips
- Disconnect battery and allow engine to cool completely.
- Depressurize the cooling system and capture coolant as required.
- Inspect the connector for corrosion or spread terminals; replace pigtail if needed.
- If no sealant is pre-applied, use an OEM-approved thread sealant; do not overtighten.
- Refill and bleed the cooling system, then verify sensor data and fan/cluster operation.
Need help confirming fitment?
Contact our team with your VIN/engine details and a photo of your old sensor.