Bosch VGS3-NAG3 — Bosch control unit. On this unit the following is available: Stage 1 for power, torque limit expansion and DTC Off, rollback to the factory calibration, Oil Pressure Optimizations. In the database — 133 modifications only on Mercedes. Read/write: Autotuner, MPPS, MagicMotorSport, KT200, FoxFlash.
The Bosch VGS3-NAG3 ECU is fitted to 133 engines in the CHIPOK database across 1 brand. Top: Mercedes (133).
The Bosch VGS3-NAG3 ECU supports: CHECK STOCK OR NOT, STAGE 1, DTC OFF, OIL PRESSURE OPTIMIZATIONS, TORQUE UNLOCK, RESET TO STOCK. Checksums are recalculated on the engineer's side in WinOLS5.
The Bosch VGS3-NAG3 is supported by: KESS3, Autotuner, MPPS, KTAG, CMD Flash, Trasdata, MagicMotorSport. On production models OBD reading is usually enough; on locked variants — Bench (BDM/JTAG).
Stage 1 on the diesel Bosch VGS3-NAG3 reprograms rail pressure target, SOI/EOI timing, boost target, smoke limiter and torque limiter. The torque gain is noticeable; the HP gain depends on the specific engine.
A Bosch VGS3-NAG3 file is accepted in .bin/.hex/.ori format (full read) from any programmer: Autotuner, KESS3 (OBD), KTAG (bench), Trasdata. Checksums are recalculated by hand in WinOLS5.
Flashing the Bosch VGS3-NAG3 takes 25-30 minutes in OBD mode or ~60 minutes on Bench. Once the file is received, CHIPOK processes it in 5-30 minutes.
The cost of flashing the Bosch VGS3-NAG3 is calculated in the price calculator: you select options (Stage 1/2, DPF off, EGR off, AdBlue off, DTC off, etc.) and the final price is capped by the package Max Price. Paid with credits (1 cr = 1 €), no subscriptions.