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Overheating Due to Failing Thermostat on Audi A8 Quattro

Problem overview

The thermostat may erratically stick open or closed. The can result in illumination of the Check Engine Light and/or engine overheating.

59 people reported this problem

24 comments

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Submitted by Vehicle Owner · May 29, 2025

Published by RepairPal

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Overheating Due to Failing Thermostat on Audi A8 Quattro

Problem overview

Audi A8 Quattro vehicles with this problem

Need a diagnosis? Trust our Audi experts.

Search for another problem

Ask our experts about your Audi.

Overheating Due to Failing Thermostat on Audi A8 Quattro

Problem overview

Audi A8 Quattro vehicles with this problem

Repairs related to this problem

Thermostat Replacement

Need a diagnosis? Trust our Audi experts.

Search for another problem

Ask our experts about your Audi.