Full 10-solenoid set for the ZF 8HP45 mechatronic unit, for BMW, Dodge Charger, Chrysler 300 and Audi Q7 with harsh shifts, slips or pressure codes.
Owners of an F30 3 Series, F10 5 Series, F25 X3, a Jaguar XF or XJ, or a Range Rover Sport usually find this page after the eight-speed starts thumping into gear, slipping on the 2-3, or throwing pressure regulator faults that return a few days after an adaptation reset. This is a complete ten-piece set for the first-generation ZF 8HP45 mechatronic unit, crossing to ZF kit 1087-298-388. The parts are remanufactured, so the bodies may show light surface marks, and each set is checked before it ships.
The 8HP45 shifts by pressure control alone. Each of its five shift elements, labeled A through E, has its own electronic pressure regulator, and the computer ramps one down while ramping the next up to make a clutch-to-clutch shift. Sonnax's identification guide lists them as EDS-1 A, EDS-3 B, EDS-5 C, EDS-6 D and EDS-4 E, plus EDS-2 for torque converter lockup, EDS-7 for line pressure and MV-1 for park. Since every shift involves two regulators at once, one tired unit upsets several gears, and the rest of the set has usually covered the same miles. That is why a full set is the normal repair on a high-mileage unit.
A leaking mechatronic connector sleeve causes many of the same complaints and costs far less, so check for fluid at the sleeve and in the harness connector first. Verify the fluid level at temperature, then read codes with a scan tool that can access the transmission module. With the unit out, Sonnax's ZF8-ZIP booklet gives about 5.0 ohms at 20 C (68 F) for these regulators with the circuit board removed, which helps separate an electrical fault from a worn valve. Our ZF8HP shift solenoid guide covers the full process, and our BMW 3 Series 8HP problems guide lists the faults F30 owners see most.
The manufacturer lists a wide range: BMW 1 Series F20/F21 2011-2019, 3 Series F30/F31/F34 2012-2019, 5 Series F10/F11/F07 2010-2017, 7 Series F01/F02/F04 2009-2015, X3 F25 2011-2017, X5 E70/F15 2010-2018 and X6 E71/F16 2010-2019; Range Rover Sport L494 2013-2017 and Discovery/LR4 2013-2018; Jaguar XF 2012-2017, XJ 2010-2019 and F-Type 2013-2017; Audi A8 D4 2010-2017 and Q7 2010-2015; and Dodge Charger, Challenger, Chrysler 300 and Ram 1500. Treat that list as a starting point. Several of those models moved to the second-generation 8HP50/75 partway through, and Transmission Digest notes Gen 2 uses different solenoid caps and swaps the B and D positions. Audi units also use their own solenoid layout. Match your transmission tag and compare caps and connectors with the photo, which shows three orange-capped and four cream-capped regulators, a black-bodied solenoid, a green-connector solenoid and the park-lock actuator. Send us your year and VIN if unsure, or browse our ZF 8HP collection.
Drain the fluid and drop the pan; on BMW the plastic pan has the filter built in and is replaced as one assembly, such as our BMW 8HP pan and filter kit. Unplug the connector sleeve, remove the mechatronic unit, release the retaining brackets and swap the solenoids one position at a time with fresh O-rings. Replace the connector sleeve while it is out. ZF's data sheet allows only LifeguardFluid 8 or 9, so refill with ZF LifeguardFluid 8 and level it at operating temperature through the fill plug with the engine running. Reset adaptations and drive gently while the computer learns the new parts. If the clutches themselves are burnt, solenoids alone will not fix it; a 8HP45 clutch module may also be needed.
| Fits | ZF 8HP45 (also listed for 8HP70, 8HP90) |
| Cross-reference | 1087-298-388, 1087298388 |
| Includes | 10 solenoids (shift, pressure regulating and parking lock) |
| Condition | Remanufactured |
| Vehicles | BMW 1/3/5/7, X1, X3, X4, X5, X6; Dodge Charger 3.6L; Chrysler 300 5.7L; Audi Q7; Jaguar XF/XJ |
| Weight | 2.23 lb |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The F10 5 Series 2010-2017 is on the manufacturer's list. Confirm the transmission tag reads a first-generation 8HP45 and compare the solenoid caps with the photo, or send us your VIN.
Both cross to ZF 1087-298-388 and show the same layout of parts. This listing counts the park-lock solenoid in its ten pieces and gives a detailed vehicle list for BMW, Jaguar, Land Rover and Audi.
Yes. A leaking sleeve lets fluid into the connector and drops pressure, causing harsh shifts and codes. Check it first and replace it whenever the mechatronic unit comes out.
Not if it has a second-generation transmission (8HP50, 8HP75 or 850RE). Those use different solenoid caps and positions. Check the transmission tag before ordering.
You can replace one, but on a high-mileage unit the others have the same wear, so a single-solenoid repair often just moves the problem to the next regulator. The full set is the more reliable fix.
