2025 BMW X3 Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

3 Coolant / Antifreeze parts for the 2025 BMW X3 come from 2 brands — PRESTONE and VALVOLINE. Every part fits all 3 engine options (2.0L L4 ELECTRIC/GAS Turbocharged, 2.0L L4 Turbocharged and 3.0L L6 Turbocharged).

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

In the Standard Replacement grade, VALVOLINE supplies 1 part: built to original-equipment specification. A representative part number is VALVOLINE 904685.

1 further part sits outside the graded sections, with the same engine-level match.

Listed part numbers: PRESTONE AFC12100, VALVOLINE 904685 and PRESTONE 78065.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

One part is listed for the 2025 BMW X3 — TECHPRO BM3014118.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

4 Coolant Reservoir Cap parts are listed for the 2025 BMW X3, from CALORSTAT, MOTORAD and REIN. 2 parts fit every engine; the other 2 are engine-specific.

Part numbers include CALORSTAT RC0084, CALORSTAT RC0083 and MOTORAD T76, among others listed above.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

2 Radiator parts for the 2025 BMW X3 come from 2 brands — CSF and FVP.

This group includes CSF 4003 and FVP RAD14042.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

3 Temperature Sender / Sensor parts for the 2025 BMW X3 come from 3 brands — NISSENS, STANDARD MOTOR PRODUCTS and VNE. 1 part fits every engine; the other 2 are engine-specific.

This group includes NISSENS 207110, STANDARD MOTOR PRODUCTS TS658 and VNE 941041.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

MOTORAD supplies both parts for the 2025 BMW X3.

Listed part numbers: MOTORAD TA9251 and MOTORAD TA3156.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

2 Water Pump parts are listed for the 2025 BMW X3, from FVP and GMB.

This group includes FVP 1153380 and the remaining parts above.