This page lists 18 cooling system parts for the 2026 BMW 840I, across 8 part types, covering the 3.0L L6 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2026 BMW 840I, 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. 11 parts of the 18 listed are Coolant / Antifreeze (4 parts), Coolant Reservoir Cap (4 parts) and Coolant Reservoir (3 parts). The other 5 part types cover the remaining 7 parts.
The 2026 BMW 840I came with a single engine, the 3.0L L6 Turbocharged, and every part is verified against it.
7 brands supply cooling system parts for the 2026 BMW 840I, led by REIN (6 parts), NISSENS (4 parts) and VALVOLINE (2 parts), plus 4 more brands. Quality grades include Economy, Premium and Standard Replacement.
Each part number listed for the 2026 BMW 840I opens a page with every vehicle that part fits.
Coolant / Antifreeze
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 719009 | 🇺🇸 US | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF6110 | 🇺🇸 US | MAX Original EquipmentEuropean Blue | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 904685 | 🇺🇸 US | HT-12 Green1 Gallon | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | 78023 | 🇺🇸 US | 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.
4 Coolant / Antifreeze parts are listed for the 2026 BMW 840I, from VALVOLINE and PRESTONE.
In the Economy grade, VALVOLINE supplies 1 part: the catalog's value-priced group. A representative part number is VALVOLINE 719009.
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: VALVOLINE 719009, PRESTONE AF6110 and VALVOLINE 904685, plus the other parts above.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | EPT0263 | 🇺🇸 US | Intercoolerwithout Cap | View on Amazon |
| REIN | EPT0242 | 🇺🇸 US | Radiatorwithout Cap | View on Amazon |
| REIN | EPK0242 | 🇺🇸 US | Includes OE cap and fluid level sensor | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
3 Coolant Reservoir parts for the 2026 BMW 840I come from REIN.
Listed part numbers: REIN EPT0263, REIN EPT0242 and REIN EPK0242.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | T76 | 🇺🇸 US | Standard | View on Amazon |
| MOTORAD | T64 | 🇺🇸 US | Standard | View on Amazon |
| REIN | CPE0035 | 🇺🇸 US | RADIATOR | View on Amazon |
| REIN | CPE0078 | 🇺🇸 US | 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.
4 Coolant Reservoir Cap parts for the 2026 BMW 840I come from 2 brands — MOTORAD and REIN.
This group includes MOTORAD T76, MOTORAD T64 and REIN CPE0035 and the remaining parts above.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 606233 | 🇺🇸 US | Auxiliary (Location-Wheel Arch) | View on Amazon |
| NISSENS | 60867 | 🇺🇸 US | Aluminum Core / Aluminum Tank | 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.
NISSENS supplies both parts for the 2026 BMW 840I.
Listed part numbers: NISSENS 606233 and NISSENS 60867.
Radiator Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN | CHR1020 | 🇺🇸 US | Material: Ethylene Propylene Terpolymer (EPDM) | View on Amazon |
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.
This group shows a single part: REIN CHR1020.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 207110 | 🇺🇸 US | Location-Cylinder Head | View on Amazon |
| STANDARD MOTOR PRODUCTS | TX332 | 🇺🇸 US | 840i Base Model or 840i xDrive Base Model | 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.
2 Temperature Sender / Sensor parts are listed for the 2026 BMW 840I, from NISSENS and STANDARD MOTOR PRODUCTS.
Listed part numbers: NISSENS 207110 and STANDARD MOTOR PRODUCTS TX332.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 832128 | 🇺🇸 US | HVAC SystemAuxiliary | 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: NISSENS 832128.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA | 01732500 | 🇺🇸 US | View on Amazon |
This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 2026 BMW 840I — AJUSA 01732500.
Buying Cooling System Parts for a 2026 BMW 840I
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 3.0L L6 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 840I?
Our catalog currently lists 18 cooling system parts for the 2026 BMW 840I across 8 subcategories and 7 brands, covering the 3.0L L6 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2026 BMW 840I?
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 840I 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 840I?
Every part on this page is matched to the 3.0L L6 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 840I
Cooling System Parts for Other BMW 840I 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.