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Calculateur bosch mg1cs202 mg1cs203 shiftech
24.07.2026News

Bosch MG1CS202 / MG1CS203: the latest Audi S5, SQ5 and RS5 models that can be remapped

The 2025 and 2026 models in Audi’s sports range came with a safeguard: their latest-generation control units were resistant to any reprogramming. The Bosch MG1CS202 and MG1CS203 incorporate some of the most advanced factory-fitted protection mechanisms ever developed on the VAG platform.

At Shiftech, these restrictions have now been removed. The 2026 RS5, a V6 PHEV with 639 ch / 825 Nm as standard, is boosted to 730 ch and 930 Nm in Stage 2. The 2025 S5 and the 2026 SQ5 follow suit.

Calculateur bosch mg1cs202 mg1cs203 shiftech

MG1CS202 & MG1CS203

Three models, two locks, one unlocking mechanism

MG1CS202: powers the 3.0 TFSI V6 in the new Audi S5 (2025) and SQ5 (2026). An inline, single-turbocharged engine, representing the direct evolution of the V6 that made the S range’s reputation at Audi.

MG1CS203: powers the 2.9 TFSI V6 plug-in hybrid in the RS5 (2026). A plug-in hybrid system that combines the twin-turbo V6 engine with an electric motor to deliver 639 ch and 825 Nm as standard. This is the latest generation of the RS5, featuring the most advanced ECU protection systems within the VAG Group.

Shiftech

The models that can be reprogrammed with this update

Models Years Engines ECUs
Audi S5 2025+ 3.0 TFSI V6 EU6 MG1CS202
Audi SQ5 2026+ 3.0 TFSI V6 EU6 MG1CS202
Audi RS5 2026+ 2.9 TFSI V6 Plug-in Hybrid — 639 ch / 825 Nm MG1CS203

Remap your Audi engine

Audi RS5

The new RS5 delivers even better performance following a remap

2026 Audi RS5 B10: 2.9 TFSI V6 Plug-in Hybrid

Performance Power Torque Price
Stage 1 639 ch → 710 ch (+71 ch) 825 Nm → 900 Nm (+75 Nm) €999 incl. VAT
Stage 2 639 ch → 730 ch (+91 ch) 825 Nm → 930 Nm (+105 Nm) €1,199 incl. VAT
E85 Flex Fuel €999 incl. VAT
Gearbox remapping €399 incl. VAT

⚠️ Important note: To carry out the remapping on these models, the ECU must be unlocked (Mail-in Unlock). Please contact your Shiftech centre before booking an appointment to discuss the specific requirements.

Audi rs 5 break 2026 shiftech

The process at Shiftech

  1. Mail-in Unlock: your ECU is sent to Autotuner’s engineers for secure unlocking, without the need to physically open the unit
  2. Bench Reprogramming: once returned to the workshop, full access to the mapping. The original mapping is backed up before any work is carried out.

Restoration to factory settings is possible at any time, free of charge for 5 years. The unlocking procedure is carried out only once per ECU.

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