2021 BMW 430I 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 430I, 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 bleeders used to purge air from the coolant circuit. Read more

2 Coolant Air Bleeder parts for the 2021 BMW 430I come from DORMAN.

This group includes DORMAN 902404 and DORMAN 902404HP.

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

One part is listed for the 2021 BMW 430I — 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

This group shows a single part: ELRING 283410.

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

7 Coolant Reservoir parts for the 2021 BMW 430I come from 4 brands — TECHPRO, MAHLE / CLEVITE, REIN and 1 other brand. The "Popular" part is TECHPRO BM3014119.

Listed part numbers: TECHPRO BM3014119, TECHPRO BM3014121 and MAHLE / CLEVITE CRT254000S, 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

4 Coolant Reservoir Cap parts for the 2021 BMW 430I come from 4 brands — CALORSTAT, MOTORAD, REIN and 1 other brand.

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

5 Radiator parts are listed for the 2021 BMW 430I, from NISSENS, TYC and UAC. TYC 13845 carries the "Popular" badge.

Part numbers include TYC 13845, NISSENS 606785 and NISSENS 606784, among others listed above.

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

2 Radiator Fan Assembly parts for the 2021 BMW 430I come from 2 brands — VEMO and VDO / CONTINENTAL.

The Economy section: 1 option from VEMO. VEMO V20010070 is listed in this group.

Standard Replacement: 1 part, from VDO / CONTINENTAL. A representative part number is VDO / CONTINENTAL FA74022.

This group includes VEMO V20010070 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

This group shows a single part: 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

9 Temperature Sender / Sensor parts are listed for the 2021 BMW 430I, from GPD, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 3 other brands. STANDARD MOTOR PRODUCTS TS658 carries the "Popular" badge.

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

The Standard Replacement section: 6 options from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, FACET and 1 other brand. STANDARD MOTOR PRODUCTS TS658 is listed in this group.

Listed part numbers: STANDARD MOTOR PRODUCTS TS658, GPD 1814545 and GPD 1814574, 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 430I come from 3 brands — SKP, FOUR SEASONS and MOTORAD.

The Economy section: 1 option from SKP. SKP SKTA9251 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 86364.

This group includes SKP SKTA9251, FOUR SEASONS 86364 and MOTORAD TA9251.

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

This group shows a single part: VEMO V20991310.