Coolant Leak

[duanea3]

Good day fellow Audi owners,

I am a bit worried. So I have a 2014 A3 1.8Tfsi saloon. It has about 65k miles on it. Recently, it started leaking coolant. I drove to the store, and underneath was a puddle of coolant at on my parking spot. As I was driving, the check coolant light went on, and I immediately went to the store to get coolant. Note, that the temperature is normal, the car wasn't overheating. I waited for the car to cool down, before I poured in the new coolant. Later that evening, I took a trip to the gas station and on my way back home, the check coolant light went on again, and the reservoir was below the minimum mark again. I parked the car in the garage, and haven't driven it since then again. I've have checked that there is almost like a clear puddle underneath the car, more to the reservoir's side. Can anyone assist me with what it could be? Anyone had similar issues before?

Thank you very much.

 

[alpesh26]

⚠️ALL S3 8V OWNERS COOLANT LEAK!!!!!!

Hi I don't own a s3 but I thought I'd shine some light on this as it is a serious problem this affects most if not all EA888 engine which includes : audi s3 8v facelift /pre facelift Vw golf gti mk7 /mk7.5 Golf r mk7/mk7.5 Seat Leon Cupra 280/300 Some of you owners may know that the cars using a...

audi-sport.net

Could be this

 

[steverobertsbbc]

Given the age and model, it's almost certainly your thermostat (which is a very misleading name, as it's a large package of electronics, motors and slide valves with a hefty price tag attached). Mine went recently (also 2014 1.8tfsi), although the repair to mine was a little more complicated as the coolant had leaked into the wiring connector and corroded it, so they needed to fix that too. I wasn't actually having a major coolant loss, but the corrosion was triggering all sorts of odd problems and putting the cart into limp-home mode. Unfortunately, the Audi main dealer in west London charged £1400 to sort this out, although that did include a precautionary change of the water pump at my request, as it was only around £60. I would strongly advise you to do the same if they're replacing the thermostat. Most of the cost is in the labour as it's a pig to get to, so you might as well take the opportunity for a new water pump at eight years old!

 

[duanea3]

Given the age and model, it's almost certainly your thermostat (which is a very misleading name, as it's a large package of electronics, motors and slide valves with a hefty price tag attached). Mine went recently (also 2014 1.8tfsi), although the repair to mine was a little more complicated as the coolant had leaked into the wiring connector and corroded it, so they needed to fix that too. I wasn't actually having a major coolant loss, but the corrosion was triggering all sorts of odd problems and putting the cart into limp-home mode. Unfortunately, the Audi main dealer in west London charged £1400 to sort this out, although that did include a precautionary change of the water pump at my request, as it was only around £60. I would strongly advise you to do the same if they're replacing the thermostat. Most of the cost is in the labour as it's a pig to get to, so you might as well take the opportunity for a new water pump at eight years old!

Thank you very much for your feedback. Yes, I was at a Audi certified mechanic and we confirmed that the water pump needs to be replaced. So I definitely going to replace it along with the thermostat.

 

[roosta]

My 2017 S3 8V just demonstrated this problem. 40k miles. I took it to my local dealer this morning. They immediately diagnosed the issue, gave me a loaner, and Audi is taking care of the cost 100%. I am the second owner, and I have no warranty. You might run it down to your dealer and have them look it over. I was pleasantly surprised.