The 2025 BMW 430I has 15 cooling system parts with verified fitment on this page — 7 part types and 11 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2025 BMW 430I, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. Most of the listed parts are Coolant Reservoir (4 parts), Coolant Reservoir Cap (3 parts) and Temperature Sender / Sensor (3 parts). The other 4 part types cover the remaining 5 parts.
The 2025 BMW 430I came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
11 brands supply cooling system parts for the 2025 BMW 430I, led by REIN (2 parts), TECHPRO (2 parts) and MOTORAD (2 parts), plus 8 more brands.
Each part number listed for the 2025 BMW 430I opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 904685 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HT-12 Green1 Gallon | View on Amazon |
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.
One part is listed for the 2025 BMW 430I — VALVOLINE 904685.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | EPT0269 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Radiatorwithout Cap | View on Amazon |
| TECHPRO | BM3014121 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits ConvertibleG23 | View on Amazon |
| TECHPRO | BM3014122 | 🇺🇸 US 🇨🇦 CA | Includes Cap | View on Amazon |
| ÜRO PARTS | 17138610652 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 430i Base Model or 430i xDrive Base Model | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
4 Coolant Reservoir parts for the 2025 BMW 430I come from 3 brands — TECHPRO, REIN and ÜRO PARTS.
Listed part numbers: REIN EPT0269, TECHPRO BM3014121 and TECHPRO BM3014122, plus the other parts above.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | RC0084 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits 430i Gran Coupe or 430i xDrive Gran Coup | View on Amazon |
| MOTORAD | T76 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
| REIN | CPE0078 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Intercooler | View on Amazon |
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.
3 Coolant Reservoir Cap parts for the 2025 BMW 430I come from 3 brands — CALORSTAT, MOTORAD and REIN.
Part numbers include CALORSTAT RC0084, MOTORAD T76 and REIN CPE0078.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 606784 | 🇺🇸 US 🇨🇦 CA | Brazed cooling fins | View on Amazon |
| TYC | 13845 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits AuxiliaryCoupe | View on Amazon |
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.
2 Radiator parts are listed for the 2025 BMW 430I, from NISSENS and TYC.
This group includes NISSENS 606784 and TYC 13845.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 207110 | 🇺🇸 US 🇨🇦 CA | Location-Cylinder Head | View on Amazon |
| STANDARD MOTOR PRODUCTS | TS658 | 🇺🇸 US 🇲🇽 MX | 430i Base Model or 430i Gran Coupewith Gauge | View on Amazon |
| WALKER PRODUCTS | 2112021 | 🇺🇸 US 🇲🇽 MX | Sensor Only | View on Amazon |
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.
3 Temperature Sender / Sensor parts are listed for the 2025 BMW 430I, from NISSENS, STANDARD MOTOR PRODUCTS and WALKER PRODUCTS.
This group includes NISSENS 207110, STANDARD MOTOR PRODUCTS TS658 and WALKER PRODUCTS 2112021.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | TA9251 | 🇺🇸 US 🇨🇦 CA | Includes Thermostat/Control Valves, Housing and Seals | View on Amazon |
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.
This group shows a single part: MOTORAD TA9251.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| INA | XW1005 | 🇲🇽 MX | Engine Code B46B20O0 | View on Amazon |
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.
This group shows a single part: INA XW1005.
Buying Cooling System Parts for a 2025 BMW 430I
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant Reservoir and Coolant Reservoir Cap .
Frequently Asked Questions
How many cooling system parts fit the 2025 BMW 430I?
Our catalog currently lists 15 cooling system parts for the 2025 BMW 430I across 7 subcategories and 11 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2025 BMW 430I?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 BMW 430I was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 BMW 430I?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 BMW 430I
Cooling System Parts for Other BMW 430I Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.