2021 BMW M235I 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

11 Coolant / Antifreeze parts are listed for the 2021 BMW M235I, 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 2 options from AISIN 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

This group shows a single part: ELRING 283410.

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

3 Coolant Reservoir Cap parts for the 2021 BMW M235I come from 3 brands — CALORSTAT, MOTORAD and REIN.

Part numbers include CALORSTAT RC0084, MOTORAD T76 and REIN CPE0078.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

One part is listed for the 2021 BMW M235I — NISSENS 961418.

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 are listed for the 2021 BMW M235I, from MAHLE / CLEVITE and NISSENS.

This group includes MAHLE / CLEVITE CR2642000P and NISSENS 60862.

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

This group shows a single part: MAHLE / CLEVITE CFF547000P.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

This group shows a single part: GATES 52455.

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 M235I, from GPD, WALKER PRODUCTS, VEMO and 3 other brands. GPD 1814545 carries the "Popular" badge.

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.

Listed part numbers: GPD 1814545, GPD 1814574 and VEMO V20720201, 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

3 Thermostat parts for the 2021 BMW M235I come from 3 brands — SKP, FOUR SEASONS and MOTORAD.

The Economy section: 1 option from SKP. SKP SKTA9254 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 86365.

This group includes SKP SKTA9254, FOUR SEASONS 86365 and MOTORAD TA9254.

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

6 Water Pump parts for the 2021 BMW M235I come from 6 brands — GMB, SALERI, BOSCH and 3 other brands. The "Popular" part is GMB 1153350.

Listed part numbers: GMB 1153350, SALERI PA1466 and BOSCH 0392023488, plus the other parts above.