Q7 MK 1 Discussion Discussion forum for the Audi Q7 SUV built from 2005 to 2015

Transmission failure and replacement (photos) ✨

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Old May 23, 2025 | 07:21 AM
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Default Transmission failure and replacement (photos) ✨

Transmission Failure & Full Service - 2015 Audi Q7 3.0T quattro S line Prestige (136k mi)

Hey everyone,
Just wanted to share my experience and ongoing repairs on my 2015 Audi Q7 3.0T quattro S line Prestige with 136k miles. Hopefully this helps someone dealing with similar issues.

Issue: Transmission Failure

While driving, the transmission suddenly failed. Upon inspection, I noticed a leak coming from the transmission cooler line. After checking the fluid, it was extremely dark, burnt, and contaminated with clutch material — definite signs of internal failure. I am guessing over a year it leaked enough which is catastrophic to a transmission.

Current Repairs (In Progress):

We're replacing the transmission and taking the opportunity to tackle several known maintenance points while everything is accessible.

Transmission & Related Components:

  • Replacement transmission & all components fluid filter etc

Engine Timing & Top-End Refresh:

  • Timing chains
  • Crankshaft seal
  • Crankcase vent valve (PCV)
  • Valve cover gaskets
  • Oil filter housing gasket
  • Engine oil cooler gasket

Cooling System:

  • Water pump
  • Thermostat
  • Coolant pipe











  • Engine coolant

Other Upgrades/Repairs:

  • Replacing solenoids
  • Motor mounts (showing signs of wear)
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Old May 23, 2025 | 08:14 AM
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Thanks for sharing! Was the fluid on the transmission ever changed before the failure?
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Old May 27, 2025 | 11:41 AM
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Yes once before
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