RSQ3 Transmission Trouble: Warning Signs & Service Tips

Had a similar situation with my 2019 Audi S3. The automatic transmission problems started with erratic shifting and eventually triggered the transmission warning light. The symptoms match classic signs of degraded transmission fluid and potential electrical system issues. The root cause turned out to be more than just a transmission fluid change. The mechatronic unit was showing undervoltage, which caused the automatic gearbox to malfunction and enter limp mode. The hydraulic fluid had metal particles, indicating internal wear. The repair required: Complete transmission fluid flush, Mechatronic unit replacement, New transmission filter, Electrical system diagnostic, Software update for the transmission control module This was definitely a serious issue that needed immediate attention. Continuing to drive with these symptoms risks permanent transmission damage. The automatic transmission in these models is quite sophisticated, and problems typically require specialized diagnostic equipment. Recommend taking it to a certified shop that specializes in VAG transmissions. They should perform a full diagnostic scan before starting any work, as erratic shifting can stem from multiple issues beyond just fluid degradation.

Thanks for sharing your experience. That mechatronic unit replacement sounds exactly like what my RSQ3 might need. The automatic transmission symptoms you described match perfectly with what I am experiencing. The hydraulic fluid definitely needs checking since the shifting has become increasingly unpredictable. Would you remember roughly how much you paid for the complete repair? Also curious if you have had any transmission performance issues since getting it fixed? Hoping to get a realistic budget estimate before heading to the shop.

Got the repairs done and everything is working perfectly now. The slipping transmission issues completely disappeared after they fixed the undervoltage problem in the mechatronic unit. The total came to 240 Euro, which was actually less than expected for such a complex transmission problem. The automatic transmission shifts smoothly now, and the hydraulic fluid test showed no more metal particles. The oil replacement made a huge difference, the transmission performance is back to factory specs. They did a thorough job checking all transmission components during the repair. Been driving for several months since the fix without any warning lights or transmission problems. Definitely worth getting it sorted early before risking more serious damage to the transmission system. Having a certified shop diagnose and repair these sophisticated transmissions is crucial for long-term reliability.

Finally got my car back from the shop today. The automatic transmission diagnosis revealed exactly what you mentioned, faulty mechatronic unit and contaminated fluid. The transmission performance was even worse than I initially thought. The repair bill came to 2800 Euro including: New mechatronic unit, Complete transmission flush, Fresh transmission oil, System diagnostics, Control module updates Definitely more expensive than your repair but worth every cent. The transmission shifts perfectly now, no more erratic behavior or warning lights. The mechanic showed me the old transmission fluid which was full of metal particles, so glad I didn't wait any longer to get it fixed. Actually really happy with the service at the new shop. They kept me updated throughout and explained everything clearly. Much better experience than my last mechanic. The car feels like new again and the automatic transmission works exactly as it should.