ZF 8HP50

Transmission version

8 -speed automatic

Reference torque limit

500 Nm

Manufacturer

ZF

BMW code reference

GA8HP50Z

500 Nm is a family-level figure in the F21 workbook, not an individual part approval.

Gear ratios

BMW F21 M140i, rear-wheel drive, 11/2018. The manufacturer document lists a different ratio set for 8HP50-1. View sources

Reverse is consistently shown with a negative sign; BMW data sheets give the magnitude of the ratio.

Fluid data

• ZF Lifeguard Fluid 8

The fluid name from Excel is not a manufacturer approval. Select fluid using the full transmission identifier and current ZF/BMW requirements. “Lifetime” alone is not a fluid specification.

ZF identification

We treat 8HP50, 8HP50X and 8HP50-1 separately. 8HP45 bill-of-materials prefixes cannot identify an 8HP50.

The GA8HP… code reference comes from the F21 workbook. The full plate and BMW part number must be checked separately; the code reference alone does not prove interchangeability.

Record the full marking on the transmission housing. ZF’s guide shows both plate and stamped identification variants.

Type designation

The exact type shown on the plate, including every suffix.

Full ZF catalogue number

Catalog Number / bill-of-materials number. The full number is required to identify parts.

Serial number

Serial Number. Identifies the individual unit; not the same as the transmission family code.

BMW / OE markings

Manufacturer part numbers and other codes on the plate. Available fields vary by version.

Label colour, casting marks and a suffix alone are insufficient for full identification. We do not use Excel’s general “X and Z = all-wheel drive” statement to identify the drivetrain.

Documented European applications (73)

F21, F22, F23, F30, F31, F36, F80, F87, G30 and F90 fitments come from research carried out by Six-In-Line Kft. in its spare time. Additional manufacturer sources and discrepancies are shown beside each result.