2023 BMW 330I 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 for the 2023 BMW 330I come from 4 brands — PRESTONE, PEAK, VALVOLINE and 1 other brand. The "Popular" part is PRESTONE AF3100.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 3 options from PRESTONE, VALVOLINE and PEAK — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.

In the Premium grade, PRESTONE and PEAK supply 5 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, AISIN, PEAK and VALVOLINE supply 3 parts: built to original-equipment specification. A representative part number is AISIN ACE008.

This table covers the bleeders used to purge air from the coolant circuit. Read more

DORMAN supplies both parts for the 2023 BMW 330I.

Listed part numbers: DORMAN 902404 and DORMAN 902404HP.

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

This group shows a single part: REIN CHE1002.

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

One part is listed for the 2023 BMW 330I — ELRING 283410.

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

5 Coolant Reservoir parts are listed for the 2023 BMW 330I, from TECHPRO and MAHLE / CLEVITE. TECHPRO BM3014121 carries the "Popular" badge.

Part numbers include TECHPRO BM3014121, MAHLE / CLEVITE CRT299000S and MAHLE / CLEVITE CRT254000S, among others listed 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

4 Coolant Reservoir Cap parts are listed for the 2023 BMW 330I, from CALORSTAT, MOTORAD, REIN and 1 other brand.

Listed part numbers: CALORSTAT RC0084, MOTORAD T76 and REIN CPE0078, 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

5 Radiator parts for the 2023 BMW 330I come from 3 brands — NISSENS, TYC and UAC. The "Popular" part is TYC 13845.

This group includes TYC 13845, NISSENS 606785 and NISSENS 606784 and the remaining parts above.

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

2 Radiator Fan Assembly parts are listed for the 2023 BMW 330I, from TECHPRO and VDO / CONTINENTAL.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO BM3115138.

The Standard Replacement section: 1 option from VDO / CONTINENTAL. VDO / CONTINENTAL FA74022 is listed in this group.

This group includes TECHPRO BM3115138 and VDO / CONTINENTAL FA74022.

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

One part is listed for the 2023 BMW 330I — REIN CHR1021.

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 for the 2023 BMW 330I come from 3 brands — WALKER PRODUCTS, STANDARD MOTOR PRODUCTS and NISSENS. The "Popular" part is WALKER PRODUCTS 2112021.

Part numbers include WALKER PRODUCTS 2112021, NISSENS 207110 and STANDARD MOTOR PRODUCTS TS658, among others listed 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 are listed for the 2023 BMW 330I, from SKP, FOUR SEASONS and MOTORAD.

Economy: 1 part, from SKP. A representative part number is SKP SKTA9251.

The Standard Replacement section: 2 options from FOUR SEASONS and MOTORAD. FOUR SEASONS 86364 is listed in this group.

Part numbers include SKP SKTA9251, FOUR SEASONS 86364 and MOTORAD TA9251.

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

One part is listed for the 2023 BMW 330I — VEMO V20991310.

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

8 Water Pump parts are listed for the 2023 BMW 330I, from FVP, GRAF, GATES and 3 other brands. GATES 41236 carries the "Popular" badge.

This group includes GATES 41236, GMB 1153360 and BOSCH 0392023486 and the remaining parts above.