This page lists 7 cooling system parts for the 2026 BMW 330I, across 4 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
The cooling system system on the 2026 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 (3 parts), Coolant Reservoir Cap (2 parts) and Coolant Reservoir (1 part). The other 1 part type covers the remaining 1 part.
The 2026 BMW 330I came with a single engine, the 2.0L L4 Turbocharged, and every part is verified against it.
5 brands supply cooling system parts for the 2026 BMW 330I, led by PRESTONE (2 parts), REIN (2 parts) and VALVOLINE (1 part), plus 2 more brands. Quality grades include Premium and Standard Replacement.
Each part number listed for the 2026 BMW 330I opens a page with every vehicle that part fits.
Coolant / Antifreeze
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF6110 | 🇺🇸 US 🇨🇦 CA | MAX Original EquipmentEuropean Blue | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 904685 | 🇺🇸 US 🇨🇦 CA | HT-12 Green1 Gallon | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | 78023 | 🇺🇸 US 🇨🇦 CA | European Vehicles (Teal)1 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.
3 Coolant / Antifreeze parts are listed for the 2026 BMW 330I, from PRESTONE and VALVOLINE.
The Premium section lists 1 option from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF6110 is listed in this group.
The Standard Replacement section lists 1 option from VALVOLINE — built to original-equipment specification. VALVOLINE 904685 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Listed part numbers: PRESTONE AF6110, VALVOLINE 904685 and PRESTONE 78023.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | EPT0269 | 🇺🇸 US 🇨🇦 CA | Radiatorwithout Cap | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
This group shows a single part: REIN EPT0269.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | T76 | 🇺🇸 US 🇨🇦 CA | Standard | View on Amazon |
| REIN | CPE0078 | 🇺🇸 US 🇨🇦 CA | 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.
2 Coolant Reservoir Cap parts for the 2026 BMW 330I come from 2 brands — MOTORAD and REIN.
This group includes MOTORAD T76 and REIN CPE0078.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 606784 | 🇺🇸 US 🇨🇦 CA | Brazed cooling fins | 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.
One part is listed for the 2026 BMW 330I — NISSENS 606784.
Buying Cooling System Parts for a 2026 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 Coolant Reservoir Cap .
Frequently Asked Questions
How many cooling system parts fit the 2026 BMW 330I?
Our catalog currently lists 7 cooling system parts for the 2026 BMW 330I across 4 subcategories and 5 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 2026 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 2026 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 2026 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 2026 BMW 330I
Cooling System Parts for Other BMW 330I 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.