AFAIK vag 1.4tsi engines are fitted with the DQ200 7 speed dry clutched DSG box. These are a sealed for life unit that do not require an oil change nor is any specified. They are riddled with poor design and manufacturing quality issues and a number of service campaigns over the years have been quietly carried out during regular servicing to try and improve reliability. In some countries VAG has had to extended the DSG warranty to 5 or 7 years following multiple failures (Australia/China) But they still have a high failure rate, usually the mechatronics unit.

In this case the Op is simply being fleeced by his garage, the DSG is covered by the standard Audi 3 year warranty. Contact AUDI customer services, complain and get a case number raised, talk directly to AUDI, not with the dealer

They might be inclined take the customers money and still get Audi to cough for a warranty repair, thereby making mega profit. Highly immoral and illegal.

BTW The cost of replacing a Mechatronics unit at Skoda/VW is usually in the region of £1500-£1800 (out of warranty). Cheaper at an independent.

www.eco-torque.co.uk/post/vw-dsg-7-speed-dsg-gearb...s

PPS there are no such things as "oil control valves" that would cost £5800. All the hydraulic control and solenoid valves are contained in the mechatronics unit along with the electronics, TCU (transmission control unit, not called an ECU).

Edited by brum on 09/05/2020 at 14:23

In common with most auto/dsg/ Multitronic boxes , the electronics sit in the gearbox and submerged in the oil . Over time , the oil becomes degraded and can corrode the circuit board.

The oil/electronics issue only affects early DQ200 dry boxes. The mechatronics unit uses its own seperate and totally different hydraulic oil to the main gearbox where the gears are. Early units used a synthetic hydraulic oil which contained additives including sulphur iirc that at elevated temperatures reacted and degraded the solder and/or insulation on the TCU board/wiring which is integral to the unit causing them to fail somewhat predictably. Following a service campaign (around 2014 iirc) the oil was changed to a mineral type hydraulic oil to address this issue. However because of the thousands of failures in hot climate countries, VAG were forced to repair failed units FOC and extend DSG warranties to as much as seven years in those countries. Uk did not benefit from this extension but the service campaign was carried out without customers knowledge during routine service. Many customers were forced to pay for repairs if the mechatronics failed out of the standard 3yr UK warranty.

AFAIK There are no such issues of oil/electronics in the other wet clutch DSG boxes. Wet boxes require a dsg oil/filter change at 40,000 miles. Starting sometime in 2018 or 2019, some (but not all) WET box variants now have a 80,000 mile service regime, but only in units manufactured after a certain date.

General consensus is that WET boxes are reasonably reliable, the DQ200 however continues to have a much higher failure rate, not only mechatronic, but clutch packs and gearbox internal selector forks. Rule of thumb is that engines developing less than or equal to 250nm max torque get the DQ200. 1.0tsi, 1.2tsi, 1.4tsi and 1.6tdi. Audi call them tfsi engines but they are the same engines.

As far as "calibration" is concerned, its known that some mechatronics units dont work with some gearboxes, having different mechanical tolerances, and need to be carefully matched, serial nos, part nos etc especially if the clutch pack is worn.. Sometimes dealers have to try more than one replacement before they work properly iirc.

Edited by brum on 09/05/2020 at 17:50

Thanks Brum,

I have registered my complaint and Audi UK are on the case. AGAIN the info you have provided will no doubt assist me with this and is much appreciated. Once I have a full answer I will add to the forum for everyone else to see who is unlucky to experience the same issue with a new car.

regards

Lee

Hi Brum

I have just found out that my car has a wet clutch box DL382 mechatronics system. if this is a 6 speed system the spec I received with my car states 7 speed...Does this sound correct to you ?

Again your assistance and advice would be greatly apreciated