SIX-IN-LINE · TRANSMISSION CATALOGUE
ZF 8HP45X
ZF 8HP45X (GA8HP45X): 8-speed automatic transmission. Separate xDrive sheet. Ratios come from the BMW M135i xDrive column; the X code and application classification come from comparing the F21 workbook and ZF catalogue.
Separate xDrive sheet. Ratios come from the BMW M135i xDrive column; the X code and application classification come from comparing the F21 workbook and ZF catalogue.
This database is the result of research carried out by Six-In-Line Kft. in its spare time.
Technical data
- Transmission version
- 8 -speed automatic
- Reference torque limit
- Not separately verified
- Manufacturer
- ZF
- BMW code reference
- GA8HP45X
The consulted sources do not establish a torque limit valid for every X version.
Gear ratios
BMW M135i xDrive, 07/2013. BMW uses the 8HP45 family name; the X classification is a research mapping requiring confirmation with the full manufacturer number. View sources
| Gear | M135i xDrive · 07/2013 | Engaged clutches / brakesFamily reference · exact variant unverified |
|---|---|---|
| Torque limit | Nincs adat | — |
| 1 gear | 4,714 | A + B + Cfamily reference |
| 2 gear | 3,143 | A + B + Efamily reference |
| 3 gear | 2,106 | B + C + Efamily reference |
| 4 gear | 1,667 | B + D + Efamily reference |
| 5 gear | 1,285 | B + C + Dfamily reference |
| 6 gear | 1,000 | C + D + Efamily reference |
| 7 gear | 0,839 | A + C + Dfamily reference |
| 8 gear | 0,667 | A + D + Efamily reference |
| Reverse (R) | -3,295 | A + B + Dfamily reference |
Reverse is consistently shown with a negative sign; BMW data sheets give the magnitude of the ratio.
Fluid data
No separately verified fluid data is available for this exact version. Determine the fluid using the full transmission identifier and BMW requirements.
ZF fluids and oil change kitsZF identification
ZF 8HP45X: 1090 020 …; separate 8HP45XHIS: 1090 024 … in the ZF catalogue. These sequences belong to all-wheel-drive units.
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.
The prefix is not a complete order number and does not by itself confirm compatibility of the specific 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.
ZF manufacturer identification guide (Transmission ID Charts, PDF page 3)Documented European applications (29)
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.
29 view pairings
| Chassis / model | Engine code | Recorded period | Source |
|---|---|---|---|
| F21 · 118d xDrive (143 LE / 105 kW) | 05.2013–02.2015 | N47D20U1 | 2013. 05. – 2015. 02. | Six-In-Line Kft. – independent F21 research |
| F21 · M135i xDrive (320 LE / 235 kW) | 02.2012–06.2016 | N55B30O0 | 2012. 02. – 2016. 06. | Six-In-Line Kft. – independent F21 research |
| F21 · M135i xDrive (326 LE / 240 kW) | 03.2015–06.2016 | N55B30O0 | 2015. 03. – 2016. 06. | Six-In-Line Kft. – independent F21 research |
| F22 · M235i xDrive (326 LE / 240 kW) | 07.2014–06.2016 | N55B30O0 | 2014. 07. – 2016. 06. | Six-In-Line Kft. – F22/F87 research carried out in spare time |
| F23 · M235i xDrive (326 LE / 240 kW) | 07.2015–06.2016 | N55B30O0 | 2015. 07. – 2016. 06. | Six-In-Line Kft. – F23 research carried out in spare time |
| F30 · 320d xDrive (163 LE / 120 kW) | 08.2012–06.2015 | N47D20O1 | 2012. 08. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 320d xDrive (184 LE / 135 kW) | 08.2012–06.2015 | N47D20O1 | 2012. 08. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 320d xDrive (200 LE / 147 kW) | 08.2012–06.2015 | N47D20O1 | 2012. 08. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 320i xDrive (184 LE / 135 kW) | 07.2012–06.2015 | N20B20U0 | 2012. 07. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 328i xDrive (245 LE / 180 kW) | 07.2012–06.2015 | N20B20O0 | 2012. 07. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 335i xDrive (306 LE / 225 kW) | 07.2012–06.2015 | N55B30M0 | 2012. 07. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 335i xDrive (326 LE / 240 kW) | 07.2012–06.2013 | N55B30M0 | 2012. 07. – 2013. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F30 · 335i xDrive (340 LE / 250 kW) | 07.2012–06.2015 | N55B30M0 | 2012. 07. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 320d xDrive (163 LE / 120 kW) | 03.2013–06.2015 | N47D20O1 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 320d xDrive (184 LE / 135 kW) | 03.2013–06.2015 | N47D20O1 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 320d xDrive (200 LE / 147 kW) | 03.2013–06.2015 | N47D20O1 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 320i xDrive (184 LE / 135 kW) | 03.2013–06.2015 | N20B20U0 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 328i xDrive (245 LE / 180 kW) | 03.2013–06.2015 | N20B20O0 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 335i xDrive (306 LE / 225 kW) | 03.2013–06.2015 | N55B30M0 | 2013. 03. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 335i xDrive (326 LE / 240 kW) | 03.2013–06.2013 | N55B30M0 | 2013. 03. – 2013. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F31 · 335i xDrive (340 LE / 250 kW) | 07.2013–06.2015 | N55B30M0 | 2013. 07. – 2015. 06. | Six-In-Line Kft. – F30/F31/F80 research carried out in spare time |
| F36 · 420d xDrive (163 LE / 120 kW) | 03.2014–06.2015 | N47D20O1 | 2014. 03. – 2015. 06. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 420d xDrive (184 LE / 135 kW) | 03.2014–02.2015 | N47D20O1 | 2014. 03. – 2015. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 420d xDrive (200 LE / 147 kW) | 03.2014–02.2015 | N47D20O1 | 2014. 03. – 2015. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 420i xDrive (163 LE / 120 kW) | 07.2014–02.2016 | N20B20U0 | 2014. 07. – 2016. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 420i xDrive (184 LE / 135 kW) | 07.2014–02.2016 | N20B20U0 | 2014. 07. – 2016. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 428i xDrive (245 LE / 180 kW) | 03.2014–02.2016 | N20B20O0 | 2014. 03. – 2016. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 435i xDrive (306 LE / 225 kW) | 07.2014–02.2016 | N55B30M0 | 2014. 07. – 2016. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
| F36 · 435i xDrive (340 LE / 250 kW) | 07.2014–02.2016 | N55B30M0 | 2014. 07. – 2016. 02. | Six-In-Line Kft. – F36 research conducted in spare time |
Partial coverage. Confirm the actual fitted transmission using the VIN or identification plate.
Sources and data status
Checked: 2026-09-30. Each source indicates which data it supports.
- BMW Ibérica · 1 Series, 07/2013 · PDF page 2
M135i automatic and M135i xDrive: 8HP45, gears 1–8 and reverse. The document uses the 8HP45 family designation for both drivetrains.
- ZF manufacturer catalogue · identification and 8HP45 bill-of-materials numbers
PDF page 3: identification plate; pages 36–37: 8HP45 / HIS and 8HP45X / XHIS number sequences. Only identification data was taken from the US catalogue.
Our research workbook: BMW_F21_sixinline_valtoadatok_es_kezi_kivitelek.xlsx · Váltó adatlapok · A4:N4. Code references from Excel do not constitute full manufacturer verification.
Always check the full manufacturer identifier and the actual version on your own transmission.
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