My 2017 GTI SE also had a slight coolant smell but no visible leaks on the garage floor. When I brought it in for the 40K mile DSG transmission fluid service a couple of months ago, my dealer detected the leak from a defective water pump and replaced it under warranty.
I HIGHLY recommend 5k oil changes with a quality synthetic oil and factory oil filters. There may be others that are OK, but you are sure to have a good filter if you use a factory filter. Stay away from brands like Fram and anything from the quicky oil change places. The filters they use a not good.
I've had my mk6 for 5 years and driven it 50,000 miles (total 130,000) on the same water pump.
36k miles and still not burning a drop between 10k OCI's. I use VW 0W-20 Full Syn 508/509 spec each and every time, until mobil1 releases a Full Syn clone. Noticed a "slight" increase in MPG's with the newer oil.
After the past year and 11k miles, I remain convinced we bought the right powertrain combination. Our situation is a bit uncommon in that we live at about 6000 feet elevation (Rocky Mountains). We cross higher mountain passes on a regular basis. This definitely amplifies the advantages of turbocharging. At high altitude, the 2.0T is substantially faster than the 3.6 VR6.
I had a similar issue with my Mk4 VR6 Golf, coolant level would drop a tiny bit over time with no obvious sign of leakage..turned out to be a very small leak at the bottom corner seam of the radiator.
I have the same problem with my new Jetta just noticed it and its been hot in Mass so it could be the same thing..once it dries you can scrape it up like candle wax... Its actaully feels like candle wax without an odor. I assume it is normal...
High pressure fuel pump sometimes will give up. Sometimes! It is not regular issue. 30min DIY job!
Got my 2017 Golf Wolfsburg Edition at the dealer right now for its 40K service and got a call that after they finished up they found a leaking water pump.
89 gti, 90 g60, 91 Jetta, 04 gti, 11 Touareg... All had water pump failures. I'm waiting for my mk7's pump to shit the bed any day now.
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