Classic symptom of thermostat failure mate. My first 3.0 TDI went in an identical way. Got my trusted independent specialist to replace it (although I'm sure it's DIYable) for £160. Sweet is a nut after that. Rock steady at 90 deg C.


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Thanks for the reply mate ! The thermostat was my first thought as well but after some searching I found people were saying these were very rare to fail, but ill take it to my trusted indy next weekend and get it looked at


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Yeah, there's been quite a few on this forum suffered failure. I would hesitate to describe it as common, but not particularly uncommon either! Your Indy will be able to confirm.


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I'm in the process of replacing my second Tstat in a year of ownership. I would try to scan for faults, could just be the sensor, but I would think the Tstat is failed open.

 

Just had mine replaced on my 3.0TDI as well. Now bang on the 90 degrees [emoji1303]


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Cheers for the shout chaps, ill get her looked at hopefully will just be a sensor if not the stat will need changing !

Another question too my front seats seem to have a problem, when the handle is pulled to fold them forward so people can get in the back. The seats fold forward but don't slide forward, I have to manually slide the seat using the handle under the seat anybody have any ideas ?


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Mines not warming up and always staying at 70 but goes up a little bit more if I dont have the heater on. Like OP i have the same 177bhp A5 2.0tdi


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Well mines off to Audi next week for some recalls/service actions doing so I'm going to ask them to have a quick look while its in I will update this post when I find out


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Goodness, I am suprised to see so many thermostat failures. My A5 is always rock steady at 90 degrees and several past VW-group motors the same. I guess that the thermostat is a fairly cheap item???

 

$100 for the S5

 

Hi guys.

I have the same problem (i guess) in my A5 2013 177 TDI Multitronic. The temperature never reaches 90 if i only drive on country roads (80-90km/h) - i need to be driving on the highway with many rpm's before i can reach 90. Do you know what impact this will have on the car on the long road? Thanks a lot.

 

I guess not running at optimum temperature for extended periods may give rise to greater wear in the long run. I'd get it sorted... I did.


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