Land Rover Freelander 2 2.2 SD4 190bhp — Engine Thermostat Sticking Open
The engine coolant thermostat fails in the 'open' position. The engine never reaches its optimal operating temperature, killing fuel economy.
Severity
MinorDIY Difficulty
Moderate
Est. Cost
£100–£250
OBD Codes
P0128Cooling
Typical layout and location for the Cooling assembly.
Symptoms
- Temperature gauge drops when driving on the motorway
- Heater blows lukewarm air in winter
- MPG drops significantly
- Engine takes a very long time to warm up
Root Cause
The wax element inside the thermostat degrades, or the return spring weakens, preventing the valve from closing off coolant flow to the radiator.
How To Fix
- Scan for P0128 (Coolant Thermostat - Coolant Temp Below Regulating Temp).
- Replace the thermostat housing unit and gasket.
- Bleed the cooling system of air.
- Cost: £100-250
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £40–£100 |
| Independent Garage | £100–£250 |
| Main Dealership | £160–£400 |
Other Faults on This Variant
Timing Belt Failure and Water Pump Failure
CriticalThe 2.2 SD4 Freelander 2 has a timing belt with a 120,000-mile interval but the water pump is driven by the same belt — and water pump failure destroys the belt. This is a common and expensive failure.
Throttle Body / Anti-Shudder Valve Strip
ModerateThe electronic throttle body (anti-shudder valve) strips its internal plastic gears, causing an unpleasant engine shutdown and a warning light.
Rear Differential Pinion Bearing Failure
CriticalA howling or droning noise from the rear of the car is almost always the rear differential pinion bearing failing. This is incredibly common on all Freelander 2s.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.