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The 3.0 TDI V6 is the engine in half the Audis we see: the S4, S5, S6, S7 and SQ5 diesels, the 45 TDI and 50 TDI A6, A7, A8, Q5, Q7 and Q8, and the VW Touareg. From 2018 it sits on a Bosch MD1CS014, and the 2024-on mild hybrids on the MD1CS064. Both were locked.
Two routes opened in July. Autotuner reads and writes both ECUs on the bench after a mail-in unlock (two minutes to read, thirty seconds to write). A week later Magic Motorsport’s Flex 8.4 added a boot glitch for the MD1CS014 that does the unlock in the workshop, so the car does not wait for the post.
Cars this opens up
- Audi S4 (2019 on), S5 (2017 on), S6 (2018 on), S7 (2019 on), SQ5 (2019 on) 3.0 TDI
- Audi A4, A5, A6, A7, A8, Q5, Q7 and Q8 in 45 TDI and 50 TDI (2018 on)
- Audi Q5 (2024 on), A6 (2025 on) and Q7 (2026 on) 3.0 TDI mild hybrid (MD1CS064)
- Volkswagen Touareg 3.0 TDI (2018 on)
What it means
The 3.0 TDI is one of the best engines to tune. The 286 PS SQ5 and 50 TDI typically go to around 340 PS and 700 Nm on a Stage 1; the 231 PS 45 TDI gains a similar 50 PS. Everything is proven on our rolling road, the original file is kept, and the gearbox file for the ZF 8-speed is available to match.
Owners: put your registration into the tuning builder, or see the Audi S4 and S5 case study. Dealers: files through the file service; the Autotuner or the Flex reads the ECU.
