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View Full Version : Power seems down..could it be related to thermostat service?



whts4
03-05-2021, 05:07 PM
I own a 2015 S4 DSG (31k mi) and recently purchased a 20k mi 2017 S5 DSG for my wife. The new car doesnt seem to have the same power as the S4 despite identical engine/trans/ sport dif.

The new car had the thermostat and water pump replaced at Audi dealer 4 weeks before i purchased the car. I'm aware that if the reassembly isnt done correctly there have been reported problems with low boost pressure...loss of prerformance.

I dont have access to diagnostic equip so looking for feedback on what i can check and how to go about it. Thx.

wes8398
03-05-2021, 09:11 PM
If reassembly went wrong, you should get a check engine light very soon after. If you don't have a CEL after a number of drives, then move on to other possible culprits.

whts4
03-06-2021, 05:08 AM
Thanks.