BMW 1, 2, 3 Series (F20, F22, F30 LCI) ZF 8HP50z Automatic Gearbox | Genuine OEM

Description

If your BMW LCI model (such as an F20 1 Series, F22 2 Series, or F30 3 Series equipped with the modular B48 2.0L or B58 3.0L engine) is experiencing gear slipping, delayed engagement, harsh shift clunks, or transmission fault codes (“Transmission Emergency Program”), a replacement ZF 8HP50z 8-speed automatic gearbox is required. We supply workshop-vetted, original 2nd-generation ZF 8-speed transmissions specifically calibrated for BMW’s modular engine platform.

Because the 8HP50z is a refined 2nd-generation evolution of the earlier 8HP45, it features revised torque converter dampening, internal clutch pack strengthening, and updated internal hydraulic valves. Our genuine units ensure ultra-fast gear changes and factory torque handling without internal slip.

• Factory-Spec Shift Speed & Efficiency: Delivers smooth, instant gear shifts under hard acceleration while optimizing fuel economy at highway cruising speeds.

• Integrated Mechatronic Unit: Includes the internal control module (EGS / Mechatronics) and torque converter assembly, thoroughly bench-tested for hydraulic pressure holding and solenoid actuation.

• Condition: Premium workshop-vetted original component; inspected for clean transmission fluid condition, magnet tray debris-free integrity, undamaged bellhousing bolt holes, and smooth output shaft rotation.

Critical Considerations for ZF 8HP50z Gearbox Replacement:

• EGS Security & ISN Alignment: The internal Mechatronic unit in the 8HP50z is electronically paired to your vehicle’s CAS/FEM immobilizer system (EWS/ISN security). Installing a donor gearbox requires specialized diagnostic software to reset the ISN security code / alignment so your CAS module allows the transmission to shift out of “Park” (P).

• Engine & Drivetrain Variations (RWD vs. xDrive / Bellhousing Patterns): The 8HP50z casing varies significantly between Rear-Wheel Drive (RWD) and All-Wheel Drive (xDrive) models due to the rear transfer case mounting flange. Furthermore, bellhousing bolt patterns differ between 4-cylinder (B48) and 6-cylinder (B58) engines. Providing your VIN is mandatory to guarantee exact mechanical match and torque rating.

• Fluid & Pan/Filter Service: Always install a brand-new transmission oil pan (which houses the integrated filter) and fresh ZF LifeguardFluid 8 during installation. Never re-use old fluid or run a dry transmission during initial startup.

Workshop Pro-Tip: Always perform the transmission adaptation reset and fluid fill procedure at exact temps! When filling the new gearbox with ZF 8 fluid, the final level check must be performed using a diagnostic scanner with fluid temperatures strictly between 30°C and 50°C. Running the car off-level or checking the fluid when hot will lead to under-filling, resulting in delayed 2nd-to-3rd gear shifts and premature clutch burn!

Key Features:

• Model-Specific: Precision-engineered for BMW F20, F22, F23, F30, F31, F32, and F36 LCI vehicles.

• Generation 2 Efficiency: Reduced drag torque and optimized internal gear ratios for B-series engines.

• Quality Assured: Vetted for hydraulic valve performance, torque converter lockup integrity, and leak-free case seals.