Complete overhaul kit for the ZF 6HP19 in RWD BMW 1/3/5-Series, Z4 and X5: frictions, steels, overhaul seals and the pan filter for a full rebuild.
If your rear-drive BMW six-cylinder is slipping on the 1-2 upshift, banging into Drive, or flaring between gears with burnt-smelling fluid, and a fluid service and solenoid check have not cured it, the unit needs to come apart. This ZF 6HP19 master rebuild kit is built for that job. One box holds the full friction clutch pack, the matching steel plates, a complete overhaul gasket and seal set and the internal pan filter, so the bench rebuild is not held up waiting on a second or third order. It cross-references ZF service kit T14300A, which is made up of T14302A, T143080A and T143081A.
The 6HP19 is the lighter-duty member of ZF's six-speed family, rated for about 400 Nm of engine torque, which is why BMW paired it with its six-cylinder engines. It uses the Lepelletier gear train: a simple planetary set ahead of a Ravigneaux set, controlled by only five shift elements, three rotating clutches and two brakes. Every gear is a two-element combination, so one worn clutch pack or one leaking piston seal affects several gears at once. The mechatronic unit under the pan adapts clutch fill pressure as parts wear, and by the time the driver feels a slip, the adaptations have usually run out. A master kit renews every friction surface and every hydraulic seal at the same time, which restores clutch clearances and lets the module start learning from a known baseline instead of compensating for wear.
Rule out the cheap faults first. Pull the case connector and look for fluid; BMW published a bulletin on the connector sealing sleeve wicking ATF into the plug, and wet pins produce faults that look like internal failure. Check the fluid level properly at temperature, then read the BMW-specific codes and adaptation values with a capable scan tool. Harsh shifts with clean fluid often trace to solenoids or a worn valve body bore rather than the clutches. Our BMW 3 Series 6HP shift problems guide walks through that order, and the ZF6HP rebuild cost breakdown helps you decide between rebuilding and replacing the unit.
The listing covers the ZF 6HP19 and 6HP21 behind 2004-2015 rear-drive BMW models, including the 128i, 135i, 325i, 328i, 330i, 335i, 525i, 528i, 530i, 535i, X1 xDrive35i, X5 and Z4, and it also names some 7 Series and M3 applications. ZF ran several variants of this unit, and some of those larger models left the factory with other transmissions, so read the ZF ID tag on the side of the case and compare your original kit numbers before ordering. If you are unsure, send us the year and VIN. You can see every part we carry for this family on the ZF 6HP transmission page.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing names both the 6HP19 and 6HP21. ZF built several variants of each, so read the ID tag on the transmission case and compare your original kit numbers, or send us your year and VIN to confirm before ordering.
The full friction clutch pack, the matching steel plates, a complete overhaul gasket and seal kit, and the internal pan filter. It cross-references ZF kit T14300A (T14302A, T143080A and T143081A).
ZF LifeguardFluid 6, the fluid ZF specifies for the 6HP family. Do not use a generic multi-vehicle ATF. Fill through the side plug and set the level with the fluid at operating temperature.
Yes. The mechatronic stores clutch fill adaptations learned from the worn parts. Clear them with a BMW-capable scan tool and drive the car gently through all six gears so the module relearns the new clutch packs.
Sometimes. A leaking connector sleeve, low or degraded fluid, worn solenoids or a worn valve body bore all cause harsh shifts with healthy clutches. Diagnose those first. Burnt fluid with friction material in the pan points to a full rebuild.
The case connector sleeve, any worn bushings found on inspection, and the valve body or solenoids if they test out of range. The torque converter should be inspected or serviced, since debris from a failed unit collects there.
