13 Cooling system parts are listed for the 2026 BMW Z4, in 7 part types, covering both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 2026 BMW Z4 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 Water Pump (3 parts), Coolant / Antifreeze (2 parts) and Coolant Reservoir (2 parts). The other 4 part types cover the remaining 6 parts.
The 2026 BMW Z4 was sold with both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. 8 parts fit every engine; the other 5 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 BMW Z4 cooling system parts are VALVOLINE (2 parts), REIN (2 parts) and NISSENS (2 parts), plus 7 more brands. Quality grades include Economy and Standard Replacement.
Each part number listed for the 2026 BMW Z4 opens a page with every vehicle that part fits.
Coolant / Antifreeze
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: all 2026 Z4 engines | 719009 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: all 2026 Z4 engines | 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.
2 Coolant / Antifreeze parts for the 2026 BMW Z4 come from VALVOLINE. Every part fits both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged.
The Economy section lists 1 option from VALVOLINE — the catalog's value-priced group. VALVOLINE 719009 is listed in this group.
In the Standard Replacement grade, VALVOLINE supplies 1 part: built to original-equipment specification. A representative part number is VALVOLINE 904685.
Part numbers include VALVOLINE 719009 and VALVOLINE 904685.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE Fits: all 2026 Z4 engines | CRT299000S | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Plastic | View on Amazon |
| REIN Fits: all 2026 Z4 engines | EPT0269 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Radiatorwithout Cap | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
2 Coolant Reservoir parts are listed for the 2026 BMW Z4, from MAHLE / CLEVITE and REIN. All of them fit every engine offered in the 2026 Z4.
This group includes MAHLE / CLEVITE CRT299000S and REIN EPT0269.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: all 2026 Z4 engines | T76 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
| REIN Fits: all 2026 Z4 engines | 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.
2 Coolant Reservoir Cap parts are listed for the 2026 BMW Z4, from MOTORAD and REIN. All of them fit every engine offered in the 2026 Z4.
This group includes MOTORAD T76 and REIN CPE0078.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS Fits: 3.0L L6 Turbocharged | 606783 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
This group shows a single part: NISSENS 606783.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS Fits: all 2026 Z4 engines | 207110 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Location-Cylinder Head | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2026 Z4 engines | TX332 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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 for the 2026 BMW Z4 come from 2 brands — NISSENS and STANDARD MOTOR PRODUCTS. Every part fits both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged.
Part numbers include NISSENS 207110 and STANDARD MOTOR PRODUCTS TX332.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 2.0L L4 Turbocharged | US8234 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GMB Fits: 2.0L L4 Turbocharged | 1153360 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| US MOTOR WORKS Fits: 2.0L L4 Turbocharged | US8234 | 🇺🇸 US 🇨🇦 CA | 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.
3 Water Pump parts are listed for the 2026 BMW Z4, from FVP, GMB and US MOTOR WORKS.
Listed part numbers: FVP US8234 and GMB 1153360, plus the other parts above.
Water Pump Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AJUSA Fits: 3.0L L6 Turbocharged | 01732500 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
This group shows a single part: AJUSA 01732500.
Buying Cooling System Parts for a 2026 BMW Z4
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.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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: Water Pump and Coolant / Antifreeze .
Frequently Asked Questions
How many cooling system parts fit the 2026 BMW Z4?
Our catalog currently lists 13 cooling system parts for the 2026 BMW Z4 across 7 subcategories and 10 brands, covering both the 2.0L L4 Turbocharged and the 3.0L L6 Turbocharged. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2026 BMW Z4 engines?
Some do. 8 parts fit every engine; the other 5 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2026 BMW Z4?
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 Z4 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 Z4?
First match the engine — each row shows which engine(s) the part fits. 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 Z4
Cooling System Parts for Other BMW Z4 Years
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