ZF8HP Transmission Cooler 2021, new and ready to install. Fits the ZF8HP. Ships fast from the USA.
If you drive a 2021 or newer BMW M3 (G80/G81), M4 (G82/G83) or M2 (G87) with the 8-speed automatic and you track it, tune the S58, or watch the transmission temperature climb on a hot day, the factory cooler is the part most likely holding you back. This is the Mishimoto MMTC-G80-21 performance transmission cooler, a direct-fit replacement for the stock ZF 8HP cooler on those cars. It installs in the factory location with its own hard lines, so there is no cutting or custom plumbing.
Every shift in a ZF 8HP is a controlled clutch slip, and every slip turns power into heat in the fluid. On the street the factory cooler keeps up. On a road course, at a drag strip or with a tune adding torque, fluid temperature rises lap after lap. Hot fluid thins, clutch apply pressure becomes harder to control, and the transmission software protects itself by changing shift behavior. Mishimoto's cooler attacks that with more surface area: 17 rows against the 14-row stock core, a 41 percent larger core volume, and about 17 percent more fluid capacity, for 1.1 quarts total including the lines. It uses a dual-pass, tube-and-fin core with internal fins, and a removable steel stone guard protects the front face.
Log transmission fluid temperature with a capable scan tool on a session that reproduces the problem. If the temperature only climbs under sustained hard use and shift quality returns as it cools, cooling capacity is the limit. If shifts are poor when cold, look elsewhere first. Check the fluid level with the ZF procedure, since a low level alone causes slips and harsh shifts, and inspect the cooler and its connections for leaks; BMW has issued bulletins on 8HP fluid loss at the transmission-side cooler line connections on other models, covered in our BMW 8HP common problems guide. Our 8HP shift problems guide covers software and adaptation causes worth ruling out.
Mishimoto lists this cooler as a direct fit for 2021-and-newer BMW G8X M2, M3 and M4 models with the S58 engine and the ZF 8-speed automatic, chassis codes G80, G81, G82, G83 and G87. It does not fit manual-transmission cars, and it is not listed for the non-M G20 3 Series or G22 4 Series. If you are unsure, send us your year and VIN and we will confirm before it ships. Other 8-speed parts for every application are on our ZF 8HP parts page.
| Fits | ZF8HP 2021 |
| Part type | Transmission Cooler |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 2021-and-newer BMW G8X M2, M3 and M4 models (G80, G81, G82, G83, G87) with the S58 engine and the ZF 8-speed automatic. It does not fit manual cars or non-M 3 and 4 Series models.
Mishimoto lists 17 rows against the stock 14, a 41 percent increase in core volume and about 17 percent more fluid capacity, 1.1 quarts total including the lines.
No. It is a direct fit in the factory location and comes with hard lines. Mounting hardware is not included, so the factory fasteners are reused.
ZF LifeguardFluid 8. You will lose some fluid during the swap and the new cooler holds more, so top up and set the level hot with the ZF fill procedure.
Usually not. A cooler helps when fluid temperature climbs under sustained hard use. Cold shift problems point to fluid level, adaptations, software or valve body issues.
