PORSCHE CAYENNE 958 92A 3.0 DIESEL Gearbox CAR Gearbox PXW
For the Porsche Cayenne (958 / 92A), the gearbox code PXW refers to the Aisin 8-speed Tiptronic S automatic transmission. While this transmission architecture is found across the 958 range, the PXW code is specifically calibrated for the 3.0L V6 Turbo Diesel and later 3.6L V6 Gasoline models (typically found in 2015–2018 facelift units).
1. Technical Specifications
The PXW belongs to the Aisin 0C8 family (also known as the AL1000 in some VW/Audi documentation). It is a traditional torque-converter automatic, chosen for the Diesel model’s high torque output and towing capabilities.
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Transmission Type: 8-Speed Tiptronic S.
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Torque Capacity: Rated to handle up to $1000\text{ Nm}$ ($737\text{ lb-ft}$).
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Engine Compatibility: * 3.0L V6 Diesel: (Engine codes: MCV.VA, CVVA) $258\text{ hp}$ / $580\text{ Nm}$.
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3.6L V6 Petrol: Used in some 2017–2018 base and S models
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AWD System: Mated to an active hang-on transfer case (PTM).
2. Part Numbers & Identification
When searching for a replacement, verify the following cross-reference numbers:
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Porsche OEM:
958.300.012.15or958.300.012.QX(Remanufactured). -
VAG Group Number:
0C8300039P. -
Alternative 3-Letter Codes: You may see QLW listed as a direct interchange for PXW.
3. 2026 Market Value
By 2026, used PXW units are plentiful but vary in price based on verified mileage, as the Diesel Cayenne is known for high-mileage longevity.
| Condition | Estimated Price (USD) | Notes |
| Used (Low Mile, <50k) | $1,800 – $2,500 | Highly desirable for refreshes. |
| Used (Standard, >100k) | $1,100 – $1,600 | Common from breakers/recyclers. |
| Remanufactured | $5,500 – $7,000 | Usually includes a new valve body. |
4. Maintenance & Fluid Service
The PXW transmission is famously robust, but “lifetime” fluid is a myth. For the 3.0 Diesel, the 2026 recommended service interval is every 60,000 – 80,000 miles.
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Fluid Spec: AW-1 / JWS 3324. (Porsche P/N:
000 043 306 24). -
Service Kit: Requires a new strainer (filter) and pan gasket.
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Filling Level: Critical. The fluid level must be checked while the transmission is between $35^\circ\text{C}$ and $45^\circ\text{C}$. If checked cold, it will be overfilled; if too hot, it will be underfilled.
5. Installation Tip: The “Diesel Shudder”
If you are looking for a PXW gearbox because your car is “shuddering” or “jerking” during light acceleration:
Check the Transfer Case first. The 3.0 Diesel is prone to transfer case failure, which mimics transmission slip. Many owners replace the entire PXW gearbox only to find the problem was a $800 transfer case issue
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