Discovery · L319 · 2005–2009
Discovery 3 temperature sensors
Coolant, intake and exhaust temperature sensors for Land Rover engines.
Matching temperature sensors to a Discovery 3
The Discovery 3 (L319, 2005–2009) was sold here with 3 different engines. Gearbox: Automatic. Send the VIN and engine number with your enquiry so the parts team can confirm the correct temperature sensors before quoting.
Know the part
Understanding Discovery 3 Temperature Sensors
Temperature sensors tell the engine control unit and instruments how hot the coolant, intake air, fuel and exhaust are. The coolant temperature sensor is the most important: the engine uses it to control fuelling, glow plugs and cooling fans, and it drives the temperature gauge.
A faulty coolant sensor can make a diesel hard to start, run rich and smoky, or show the wrong temperature on the gauge.
Further reading
- Temperature sensor – Wikipedia
Background on temperature sensing.
Common Questions About Discovery 3 temperature sensors
Can a faulty coolant temperature sensor cause hard starting?
Yes. If the sensor tells the engine it is warm when it is cold, the engine may not use enough glow plug time or fuel for a cold start.
How do I test a temperature sensor?
Compare the live reading on a diagnostic tool with the actual engine temperature, or measure the sensor's resistance against the workshop specification.
Should I bleed the cooling system after replacing the sensor?
Yes. Top up and bleed any air, as an air pocket around the sensor gives false readings.
What should I send to order a temperature sensor?
The VIN, engine code and which sensor you need, as engines have several.
Other Discovery 3 cooling
Not sure which part fits?
Share your VIN or engine code and the parts team will check the correct part for your Discovery 3.