Browse over 9,000 car reviews
The gearbox on my 2016 Volkswagen Polo has failed
The seven-speed DSG transmission in your car is a known trouble-spot and has caused lots of grief for owners over the years. Failures can occur in the clutch-packs, the electronic control units or the gearsets themselves and, once the failure has occurred, it's usually time for a whole new transmission.
Mechanics can often become a bit jaded when they see multiple failures of the same component, but in this case, they're probably right. Your problem then becomes one of the cost of repairs being more than the repaired car is worth.
Oil pressure issues in a Volkswagen Polo TSI
You could well be on the right track here. Many cars with transmission coolers place them in the car's radiator so that the liquid that cools the engine, also cools the transmission. But if the transmission cooler fails, that can allow transmission fluid into the car's coolant system which might account for the oil you're seeing in your coolant bottle. Many mis-diagnose this as a blown head gasket because the outward symptoms are very similar.
If this is the case, the bad news is that coolant has probably also entered the transmission potentially wrecking the mechanical parts and frying the electronic bits.
My Volkswagen Polo TSi 1.4 is mixing water and oil which is then coming out through the exhaust
None of these symptoms are what you want to find. Any car mixing its coolant with its engine oil has some kind of internal failure (often a head gasket failure) and a car that is consuming oil at a fast rate is also probably suffering some kind of internal damage or wear. Have a mechanic perform a few basic tests on the engine (compression, leak-down and head-gasket) and proceed from there. But if it's as bad as it sounds, you could be looking for a new engine (or a new car).
These engines were known for being quite complex and perhaps not as durable as they should have been in some cases. They're also quite expensive to rebuild and may cost more to fix than the entire car is worth. At that point, you have some tough decisions to make.
* Price is the median price of 8 listings for the Polo for sale in the last 6 months. The Price excludes costs such as stamp duty, other government charges and options.
Disclaimer: Glass's Information Services (GIS) and CarsGuide Autotrader Media Solutions Pty Ltd. (CarsGuide) provide this information based on data from a range of sources including third parties. Whilst all care has been taken to ensure its accuracy and reliability, GIS and CarsGuide do not warrant or represent that the information is accurate, reliable, complete, current or suitable for any particular purpose. You should not use or rely upon this information without conducting an independent assessment and valuation of the vehicle.
To the maximum extent permitted by law, GIS and CarsGuide exclude all liability for any direct, indirect, special or incidental loss, damage, expense or injury resulting from, arising out of, or in connection with your use of or reliance upon this information.