2021 BMW M240I 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

12 Coolant / Antifreeze parts are listed for the 2021 BMW M240I, from PRESTONE, PEAK, VALVOLINE and 1 other brand. PRESTONE AF3100 carries the "Popular" badge.

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 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 hard pipes and extra hoses in the coolant circuit. Read more

REIN supplies the 3 Coolant Hose / Pipe parts for the 2021 BMW M240I.

Listed part numbers: REIN CHE0994, REIN CHE1003 and REIN CHE1026.

This table covers the Coolant Hose Connector flanges. Read more

REIN supplies both parts for the 2021 BMW M240I.

Listed part numbers: REIN CHU0940 and REIN CHK0940.

This table covers the Coolant Hose Flange plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

One part is listed for the 2021 BMW M240I — REIN CHM0562.

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

7 Coolant Reservoir parts for the 2021 BMW M240I come from 4 brands — REIN, MAHLE / CLEVITE, ÜRO PARTS and 1 other brand. The "Popular" part is REIN EPK0235.

Listed part numbers: REIN EPK0235, ÜRO PARTS 17138677649 and GPD 2411316, 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

5 Coolant Reservoir Cap parts for the 2021 BMW M240I come from 3 brands — REIN, CALORSTAT and MOTORAD. The "Popular" part is REIN CPE0035.

Part numbers include REIN CPE0035, CALORSTAT RC0084 and CALORSTAT RC0083, 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

9 Radiator parts are listed for the 2021 BMW M240I, from NISSENS, TECHPRO, KOYORAD and 2 other brands. KOYORAD A13782 carries the "Popular" badge.

Economy: 2 parts, from TECHPRO. A representative part number is TECHPRO BM3010195.

The Standard Replacement section: 6 options from NISSENS, KOYORAD and MAHLE / CLEVITE. KOYORAD A13782 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

This group includes KOYORAD A13782, TECHPRO BM3010195 and TECHPRO BM3010197 and the remaining parts above.

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

3 Radiator Fan Assembly parts for the 2021 BMW M240I come from 2 brands — TECHPRO and FOUR SEASONS.

The Economy section: 2 options from TECHPRO. TECHPRO BM3115131 is listed in this group.

Standard Replacement: 1 part, from FOUR SEASONS. A representative part number is FOUR SEASONS 75321.

Listed part numbers: TECHPRO BM3115131, TECHPRO BM3115132 and FOUR SEASONS 75321.

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

5 Temperature Sender / Sensor parts are listed for the 2021 BMW M240I, from GPD, WALKER PRODUCTS, FACET and 2 other brands. WALKER PRODUCTS 2112021 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 1814545.

The Standard Replacement section: 4 options from WALKER PRODUCTS, FACET, STANDARD MOTOR PRODUCTS and 1 other brand. WALKER PRODUCTS 2112021 is listed in this group.

Listed part numbers: WALKER PRODUCTS 2112021, GPD 1814545 and FACET 73405, plus the other 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

6 Thermostat parts for the 2021 BMW M240I come from 6 brands — ÜRO PARTS, SKP, VEMO and 3 other brands. The "Popular" part is ÜRO PARTS 11537642854.

The Economy section: 3 options from ÜRO PARTS, SKP and VEMO. ÜRO PARTS 11537642854 is listed in this group.

Standard Replacement: 3 parts, from MOTORAD, FOUR SEASONS and REIN. A representative part number is MOTORAD 1223207.

Listed part numbers: ÜRO PARTS 11537642854, SKP SK86355 and VEMO V20990008, plus the other parts above.

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

ELRING supplies the 5 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 BMW M240I. ELRING 473920 carries the "Popular" badge.

This group includes ELRING 473920, ELRING 071220 and ELRING 773870 and the remaining parts above.

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

This group shows a single part: ÜRO PARTS 11118619408PRM.

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

5 Water Pump parts for the 2021 BMW M240I come from 4 brands — BOSCH, GMB, GATES and 1 other brand. The "Popular" part is GMB 1153160.

Part numbers include GMB 1153160, BOSCH 0392023509 and BOSCH 039202411C, among others listed above.

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

ELRING supplies the 3 Water Pump Gasket parts for the 2021 BMW M240I.

This group includes ELRING 773780, ELRING 773830 and ELRING 773880.