41 Cooling system parts are listed for the 2021 BMW 330I, in 8 part types, covering the 2.0L L4 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 2021 BMW 330I keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (12 parts), Radiator (11 parts) and Coolant Reservoir (5 parts). The other 5 part types cover the remaining 13 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2021 BMW 330I.
The most listed brands for 2021 BMW 330I cooling system parts are PRESTONE (5 parts), PEAK (4 parts) and TECHPRO (4 parts), plus 19 more brands. Quality grades include Standard Replacement, Economy and Premium.
8 parts on this 2021 BMW 330I page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PRESTONE AF3100 (Coolant / Antifreeze) and TECHPRO BM3014121 (Coolant Reservoir). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF3100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| VALVOLINE Popular | 719009 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Blue Mountain Long LifeAll Vehicle | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 1 GallonGlobal Lifetime | View on Amazon |
| PRESTONE | AF6110 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | MAX Original EquipmentEuropean Blue | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN | ACE008 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BlueHOAT | View on Amazon |
| PEAK | PEB1GAL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OET European Extended Life Blue1 Gallon | View on Amazon |
| 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.
12 Coolant / Antifreeze parts for the 2021 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.
Coolant Air Bleeder
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 902404 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plastic | View on Amazon |
| DORMAN | 902404HP | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE FIX | View on Amazon |
This table covers the bleeders used to purge air from the coolant circuit.
DORMAN supplies both parts for the 2021 BMW 330I.
Part numbers include DORMAN 902404 and DORMAN 902404HP.
Coolant Hose / Pipe
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | CHE1002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Expansion Tank Radiator (Upper) | View on Amazon |
This table covers the hard pipes and extra hoses in the coolant circuit.
This group shows a single part: REIN CHE1002.
Coolant Hose / Pipe Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 283410 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Material: FPM (Fluoride Rubber) | View on Amazon |
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.
One part is listed for the 2021 BMW 330I — ELRING 283410.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO Popular | BM3014121 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | G20 | View on Amazon |
| MAHLE / CLEVITE | CRT299000S | 🇺🇸 US 🇨🇦 CA | Plastic | View on Amazon |
| MAHLE / CLEVITE | CRT254000S | 🇺🇸 US 🇨🇦 CA | Includes Sensor | View on Amazon |
| TECHPRO | BM3014120 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Cap | View on Amazon |
| TECHPRO | BM3014119 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | G20Auxiliary Tank | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
5 Coolant Reservoir parts are listed for the 2021 BMW 330I, from TECHPRO and MAHLE / CLEVITE. TECHPRO BM3014121 carries the "Popular" badge.
This group includes TECHPRO BM3014121, MAHLE / CLEVITE CRT299000S and MAHLE / CLEVITE CRT254000S and the remaining parts above.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | RC0084 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Auxiliary | View on Amazon |
| MOTORAD | T76 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
| REIN | CPE0078 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Intercooler | View on Amazon |
| ÜRO PARTS | 17138665638 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Use For large expansion tank. | 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.
4 Coolant Reservoir Cap parts are listed for the 2021 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.
Radiator
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER | 13799 | 🇺🇸 US 🇨🇦 CA | Fits MainM Sport | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KOYORAD Popular | A13799 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | External Oil Cooler | View on Amazon |
| TYC Popular | 13845 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AuxiliaryLow Temperature Radiator | View on Amazon |
| TYC Popular | 13799 | 🇺🇸 US 🇨🇦 CA | PrimaryTo 08/2020 | View on Amazon |
| AGILITY | 8013799 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | MAIN RADIATOR | View on Amazon |
| NISSENS | 606785 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| NISSENS | 606784 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| NISSENS | 606783 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Brazed cooling fins | View on Amazon |
| OSC | 13799 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits with Sport Packag | View on Amazon |
| UAC | RA13845C | 🇺🇸 US 🇨🇦 CA | Auxiliary Unit | View on Amazon |
| UAC | RA13799C | 🇺🇸 US 🇨🇦 CA | Main Unit | 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.
11 Radiator parts for the 2021 BMW 330I come from 7 brands — NISSENS, TYC, UAC and 4 other brands. The "Popular" part is KOYORAD A13799.
The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER 13799 is listed in this group.
Standard Replacement: 10 parts, from NISSENS, TYC, UAC and 3 other brands. A representative part number is KOYORAD A13799.
Radiator Fan Assembly
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO | BM3115138 | 🇺🇸 US 🇨🇦 CA | G20Sedan | View on Amazon |
| VEMO | V20010070 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS Popular | 75323 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without M Sport Package | View on Amazon |
| FOUR SEASONS | 75321 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with M Sport Package | View on Amazon |
| VDO / CONTINENTAL | FA74022 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 500 Watt Motorwith Air Conditioning | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
5 Radiator Fan Assembly parts are listed for the 2021 BMW 330I, from FOUR SEASONS, TECHPRO, VEMO and 1 other brand. FOUR SEASONS 75323 carries the "Popular" badge.
Economy: 2 parts, from TECHPRO and VEMO. A representative part number is TECHPRO BM3115138.
The Standard Replacement section: 3 options from FOUR SEASONS and VDO / CONTINENTAL. FOUR SEASONS 75323 is listed in this group.
Listed part numbers: FOUR SEASONS 75323, TECHPRO BM3115138 and VEMO V20010070, plus the other parts above.
Buying Cooling System Parts for a 2021 BMW 330I
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 / Antifreeze and Radiator .
Frequently Asked Questions
How many cooling system parts fit the 2021 BMW 330I?
Our catalog currently lists 41 cooling system parts for the 2021 BMW 330I across 8 subcategories and 22 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 2021 BMW 330I?
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 2021 BMW 330I 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 2021 BMW 330I?
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 2021 BMW 330I
Cooling System Parts for Other BMW 330I Years
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