2021 BMW X4 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

13 Coolant / Antifreeze parts are listed for the 2021 BMW X4, from PRESTONE, PEAK, VALVOLINE and 1 other brand. PRESTONE AF3100 carries the "Popular" badge. All of them fit every engine offered in the 2021 X4.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, PRESTONE, VALVOLINE and PEAK supply 3 parts: the catalog's value-priced group. A representative part number is PRESTONE AF3100.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 3 options from AISIN, PEAK and VALVOLINE — built to original-equipment specification. AISIN ACE008 is listed in this group.

This table covers the seals at the Coolant Hose / Pipe. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Coolant Hose / Pipe Seal parts for the 2021 BMW X4 come from ELRING. 1 part fits every engine; the other 1 is engine-specific.

This group includes ELRING 283410 and ELRING 521520.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2021 BMW X4 — MOTORAD CH7113.

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

9 Coolant Reservoir parts for the 2021 BMW X4 come from 4 brands — REIN, MAHLE / CLEVITE, TECHPRO and 1 other brand. The "Popular" part is REIN EPT0262. 7 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: REIN EPT0262, ÜRO PARTS 17138742660K and MAHLE / CLEVITE CRT302000S, plus the other parts above.

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

6 Coolant Reservoir Cap parts for the 2021 BMW X4 come from 3 brands — MOTORAD, REIN and CALORSTAT. The "Popular" part is MOTORAD T64. 4 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: MOTORAD T64, REIN CPE0035 and CALORSTAT RC0084, plus the other parts 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

10 Radiator parts are listed for the 2021 BMW X4, from CSF, KOYORAD, FVP and 3 other brands. KOYORAD A13910 carries the "Popular" badge. 5 parts fit every engine; the other 5 are engine-specific.

Economy: 1 part, from GPD. A representative part number is GPD 13910C.

The Standard Replacement section: 9 options from CSF, KOYORAD, FVP and 2 other brands. KOYORAD A13910 is listed in this group.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

7 Radiator Fan Assembly parts for the 2021 BMW X4 come from 6 brands — TECHPRO, GPD, FOUR SEASONS and 3 other brands. The "Popular" part is FOUR SEASONS 75319. 1 part fits every engine; the other 6 are engine-specific.

The Economy section: 3 options from TECHPRO and GPD. GPD 2812279 is listed in this group.

Standard Replacement: 4 parts, from FOUR SEASONS, TYC, UAC and 1 other brand. A representative part number is FOUR SEASONS 75319.

This group includes FOUR SEASONS 75319, GPD 2812279 and TECHPRO BM3115136 and the remaining parts above.

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

8 Temperature Sender / Sensor parts are listed for the 2021 BMW X4, from GPD, WALKER PRODUCTS, VEMO and 3 other brands. GPD 1814545 carries the "Popular" badge. 7 parts fit every engine; the other 1 is engine-specific.

Economy: 3 parts, from GPD and VEMO. A representative part number is GPD 1814545.

The Standard Replacement section: 5 options from WALKER PRODUCTS, FACET, STANDARD MOTOR PRODUCTS and 1 other brand. WALKER PRODUCTS 2112021 is listed in this group.

This group includes GPD 1814545, GPD 1814574 and VEMO V20720201 and the remaining parts above.

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

11 Thermostat parts for the 2021 BMW X4 come from 9 brands — MOTORAD, FOUR SEASONS, SKP and 6 other brands. The "Popular" part is GATES 34245.

The Economy section: 2 options from SKP and ÜRO PARTS. SKP SK902817 is listed in this group.

Standard Replacement: 6 parts, from GATES, MOTORAD, BECK/ARNLEY and 3 other brands. A representative part number is GATES 34245.

3 further parts sit outside the graded sections, with the same engine-level match.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

3 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 BMW X4, from ELRING, FEL-PRO and MAHLE / CLEVITE.

Part numbers include ELRING 082150, FEL-PRO 36226 and MAHLE / CLEVITE C32504.

This table covers the housings and outlets the thermostat sits in. Read more

3 Thermostat Housing / Water Outlet parts for the 2021 BMW X4 come from 2 brands — VEMO and MOTORAD.

This group includes MOTORAD CH7107, VEMO V20991310 and VEMO V20990005.

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

12 Water Pump parts for the 2021 BMW X4 come from 7 brands — FVP, GRAF, BOSCH and 4 other brands. The "Popular" part is GATES 41236.

The Economy section: 1 option from ÜRO PARTS. ÜRO PARTS 11518482251 is listed in this group.

Standard Replacement: 3 parts, from BOSCH, FVP and GRAF. A representative part number is BOSCH 0392023486.

8 further parts sit outside the graded sections, with the same engine-level match.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

3 Water Pump Gasket parts are listed for the 2021 BMW X4, from ELRING and AJUSA.

Listed part numbers: AJUSA 01732500, ELRING 078580 and ELRING 113600.