Parts for your 2007 Nissan Primera-Thermostat

2007 Nissan Primera Thermostat

Referencing technical sources such as the Nissan Primera P12 Factory Service Manual (Cooling System section), the Haynes manual covering Primera 2002–2008, and Dayco/Gates parts catalogues, the 2007 Nissan Primera is unequivocally fitted with a conventional engine coolant thermostat across its common engines (QG18DE 1.8 petrol, QR20DE 2.0 petrol, and YD22 2.2 diesel). A thermostat is therefore relevant and used on this model.

The thermostat’s whole job is to keep the engine at its sweet-spot temperature. It stays shut while the engine warms, then starts opening around the stamped rating (typically about 82°C on many Primera engines per the factory data), letting coolant flow to the radiator. That steady operating temp helps fuel economy, trims emissions, improves heater performance, and prevents hotspots that can shorten engine life.

As part of regular servicing on a 2007 Primera, the thermostat deserves a bit of attention. While there’s no strict replacement interval in the factory schedule, many technicians treat it as a wear item: replace it if temperature behaviour isn’t right, during a cooling system overhaul, or proactively around higher mileage. Always match the correct spec for the engine code and build year, including the temperature rating and seal type, as listed in the Nissan parts catalogue and reputable aftermarket catalogues.

Tell-tale signs the thermostat needs love:

• Slow warm-up, poor cabin heat, or the gauge sitting lower than normal on the open road (may be stuck open)
• Overheating, fluctuating temperature, or the radiator staying cool while the engine’s hot (may be stuck closed)
• Cooling fans running more than usual, increased fuel use, or fault codes related to coolant temperature

When replacing, use an OEM-quality thermostat and a new O-ring/gasket. Fit it in the correct orientation (the bleed pin/jiggle valve typically near 12 o’clock), torque the housing evenly, and refill with the right coolant—Nissan Long Life–type or equivalent that meets the Nissan spec. Bleed the system thoroughly with the heater on hot, top up with the correct coolant/water mix (not plain water), and check for leaks after a short drive. It’s a tidy two-birds-one-stone job to pair with a coolant flush, fresh radiator hoses, and, where applicable, a water pump service.

Done right, the Primera will warm up smartly, hold a rock-steady temperature in Kiwi and Aussie conditions, and keep the engine and heater happy for the long haul.

Popular questions

Where is the thermostat on a 2007 Nissan Primera?
It’s housed in the water inlet/thermostat housing where the lower radiator hose meets the engine. On the petrol QG/QR engines this is at the front side of the block