Cooling & Filtration

Shop ZF 8HP cooling and filtration parts: oil cooler adapters, cooler kits, oil pans, filters, breathers and valve body hardware. Heat is what kills a ZF 8HP, swapped or standard. This is the parts group that keeps oil temperature, oil level and oil cleanliness under control, so it belongs in the plan from the start rather than after the first hot day. Confirm the exact gearbox code and your cooler circuit before ordering, because 8HP housings and cooling arrangements are not interchangeable.

Find your 8HP oil cooler adapter

An oil cooler adapter is the interface between the transmission and your cooler circuit. Confirm the gearbox code and the connection style on the listing before you buy, then plan the lines, cooler mounting and airflow as one package with your installer.

8HP Oil Cooler Adapter the general 8HP cooler interface.
Domiworks 8HP Oil Cooler Adapter for BMW N57 & B58 named for N57 and B58 applications.
HPR 8HP oil cooler kit a complete cooler kit rather than an adapter on its own.

Find your 8HP oil pan

Pan choice sets oil capacity, drain and temperature-sensor access and service access underneath the car. Deep and high-volume pans add capacity over a standard pan, which is worth planning deliberately if the car does track work, towing or long hill climbs.

8HP Billet Oil Pan the billet pan option.
8HP Billet Oil Pan, Deep High Volume (+3.1L) extra capacity for heat-heavy use.
Billet Aluminum Deep Transmission Pan, ZF 8HP (8HP45 / 8HP50 / 8HP51 / 8HP70 / 8HP75 / 8HP76) a deep pan option spanning the listed 8HP variants.
8HP oil pan service kit the supporting hardware to complete a pan service.

DCT pans, plugs and side covers

Filters, breathers and valve body hardware

Filtration and breather hardware protect the oil and the valve body. Match the filter to the pan it sits in, because filter fitment follows the pan design, not the badge on the car.

Filters

Breathers

Oil pump and valve body hardware

Choose cooling parts as a system

Cooling is a circuit, not a single part. Work through these checks before you order, so the hardware you buy actually works together.

Identify the exact gearbox. Record the full transmission code and donor details. The 8HP family includes different housings and cooling arrangements.
Review the vehicle layout. Check available space, airflow, line routing and access for future servicing with your installer.
Match the adapter and fittings. Confirm the product listing against the gearbox, vehicle and planned cooler circuit rather than choosing by appearance alone.
Plan filtration and service access. Include the correct pan, filter, seals and fluid service requirements for the parts being used.
Check the complete swap package. Cooling works alongside the gearbox, engine adapter, controller and harness, and driveline plan.

Plan the cooler circuit before you buy

The parts here are the hardware end of a heat-management decision. Read the planning guides first if the cooler size, line route or temperature target is still open:

ZF 8HP transmission cooler guide for the cooler decision itself.
8HP cooling guide: oil pans, cooler adapters and heat control for how the parts fit together.
8HP swap cooling checklist: cooler, lines and temperature planning for the build sequence.
ZF 8HP cooling guide and ZF 8HP service guide for the service side.

If a scan report has already flagged a temperature fault, start with the code before buying parts. BMW 4209A4 (transmission Hot Mode 3) is the over-temperature code, and the diagnostic library covers the rest: BMW and ZF 8HP fault code library.

Build the complete 8HP swap

Cooling is one line item. Plan the rest of the driveline at the same time so nothing arrives mismatched:

ZF 8HP gearboxes to confirm the exact model.
Engine adapter kits for the engine-to-gearbox joint.
TCU controllers and harnesses for the control strategy.
Shifters and controls for the selector and paddle interface.
Output flanges and driveline to connect the gearbox to the car.
Flexplates and drive plates for the engine-to-converter joint.
Internals and clutch parts once the gearbox is open.

Two more guides worth reading alongside this page: the 8HP service parts guide and the 8HP swap buyer's checklist, or start from the 8HP swap guides hub.

8HP cooling and filtration FAQ

Does every 8HP use the same cooler adapter?

No. Confirm the exact transmission, housing, vehicle layout and product listing before ordering. Ask 8HP.Shop if the gearbox code or connection details are unclear.

Should cooling be planned before the gearbox is installed?

Yes. Planning space, airflow, line routing and service access before installation can prevent avoidable rework. Final sizing and installation decisions belong with the qualified installer responsible for the build.

What details help with a parts recommendation?

Send the vehicle, engine, transmission code, donor details, intended use and photos of the relevant connections. Include the current controller and cooling plan if the conversion is already underway.

How do I choose an oil pan for a ZF 8HP?

Start with the exact gearbox code, whether the car is all-wheel drive or rear-wheel drive, and how much service access you want underneath. Deep and high-volume pans increase capacity, which matters for track work, towing or sustained load. Match the filter and plug to the pan you choose.

Why does oil temperature matter more than the code on the scan tool?

A temperature-related fault such as BMW 4209A4 is a symptom, not a diagnosis. Record when it happens, the oil condition and the cooler and line layout before replacing parts, then confirm what the fault is actually telling you.

Can I buy a cooler adapter, pan and filter separately?

Yes, every item on this page can be ordered individually, and the listings include the fitment details they were sold with. If you are building a complete package, send the gearbox code and vehicle details and 8HP.Shop will point you to the parts that suit your build.