8-Speed Automatic Transmission Assembly for 2012-2013 Audi A8, Quattro
Product Notes Read before buying
This transmission fits 2012-2013 Audi A8 models equipped with the 4.2L V8 gasoline engine. It is compatible with transmission codes MNX and MXR. For 2012 models, this part fits vehicles built from October 1, 2011, onward. Please verify your vehicle's production date and transmission code to ensure proper fitment.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2012 - 2013 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Sedan | 2012 | V8 4.2L | AWD | Automatic |
| Elite | Sedan | 2012 | V8 4.2L | AWD | Automatic |
| L | Sedan | 2012 | V8 4.2L | AWD | Automatic |
| Premium | Sedan | 2012 | V8 4.2L | AWD | Automatic |
| 2013 |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Verify transmission code MNX or MXR on the build sticker in the spare tire well or owner's manual.
- Confirm the stamped code on the transmission case metal ID plate matches MNX or MXR.
- Confirm the engine is a 4.2L V8 FSI (engine code CDRA).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support fixture/bar
- Triple-square (XZN) socket set
- Torx socket set
- VAG-specific diagnostic scanner (VCDS, OBDeleven, or ODIS)
- Transmission jack/table
- Modified Torx wrench
Budget for these consumables at install:
- ZF Lifeguard 8 ATF (Audi Spec: G 060 162 A2) - 8 to 9.1 Quarts / Liters
- Front Differential Fluid (G 052 145 S2 75W-90 synthetic gear oil) - 1.0 Liter
- Center Differential / Transfer Case Fluid (G 055 145 A2 with STURACO) - 1.0 Liter
- Transmission oil pan filter and gasket kit (ZF Part #1087298247 or Audi Part #0BK398009A)
- Torque converter input shaft hub seal
- Subframe / X-Brace Torque-to-Yield (TTY) stretch bolts (6 pieces)
- Professional-grade transmission cooler line flush
What your vehicle’s computers will need after the swap:
What’s involved: Immobilizer / Component Protection Re-marriage and TCM Adaptive Relearn
The TCM is tied to Audi's anti-theft Immobilizer system. VIN mismatch triggers Component Protection mode (DTC P1701), locking the transmission. Requires online ODIS connection to Audi GeKo servers to unlock, or specialized bench-cloning of original mechatronics data.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Must click three times to fully seat. Failure to do so will crack the oil pump upon bolting to the engine.
- Jack Mode / Air Suspension: Must enable 'Jack Mode' in the MMI before lifting to prevent air suspension damage.
- Fluid Fill Temperature: Level must be checked at the fill plug only when fluid temperature is strictly between 35°C and 45°C (or 30-40°C per Arm 2) using a diagnostic scanner.
- Emergency Park Release: Electronic shift-by-wire requires pulling the red emergency release cable under the driver's side floor mat to unlock Park if battery is dead.
- Resetting Adaptations: Learned shift adaptations must be cleared and a specific road test adaptation drive cycle performed post-install.
Easy to get right once you know them:
- Reusing Subframe Stretch Bolts: Reusing TTY bolts can cause them to back out or snap, leading to structural failure.
- Using the Wrong Fluid: Using generic 'multi-vehicle' ATF instead of ZF Lifeguard 8 causes harsh shifting and rapid clutch wear.
- Assuming Plug and Play: Expecting the car to drive without performing the online Component Protection release.
- Not Checking Differential Fluids: Forgetting to fill the integrated front and center differentials which run on separate oil chambers.
- Skipping the Cooler Flush: Allowing debris from the previous failure to contaminate the replacement transmission's valve body.
- Misdiagnosing the Original Failure: Swapping the transmission when the actual issue is an engine control module fault or coolant intrusion.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: TCM (J217) software update.
🔎 Recommended at install: TCM (J217) software calibration update.
🔎 Recommended at install: Voltage regulation diagnostic and software update.
🔎 Recommended at install: Replace torque converter; flush system to prevent valve body solenoid clogging.
🔎 Recommended at install: Clean/replace solenoids or replace mechatronic unit.
🔎 Recommended at install: Replace O-rings or connector sleeve seal.
🔎 Recommended at install: Address coolant valve leak per recall instructions.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-10318-3008058). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2012-2013 Audi A8 4.2L ZF 8HP55A Transmission: Problems, Identification, and Used Replacement
Identify the exact MNX or MXR transmission code, learn what causes mechatronic and torque converter failures, and know when to replace it with a used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
1 matching guideIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Audi: 008MNX, 008MXR, 0BK300039G008
Fits Years: 2012 2013
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This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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