Home Services
Mobile Services & Areas ECU Remapping Diagnostics Repairs & Servicing Custom Exhausts Hardware Installs DPF Solutions EGR Solutions AdBlue & NOx MOT & Inspections Underside Restoration
Builds Contact
Home / ECU Remapping / BMW 330i
B48 Engine

BMW 330i

G20/G21

The G20 330i with the B48 four-cylinder turbo. A refined daily that picks up noticeable mid-range torque and sharper throttle response from a Stage 1 remap.

255 Stock BHP
310 Stage 1 BHP
360+ Stage 3 Ceiling
Enquire Now →
BMW 330i G20/G21
Performance Stages

B48 Tuning Stages

All power figures are average estimates based on typical results. Actual gains depend on vehicle condition, fuel quality and supporting modifications.

01

Stage 1

290-310 bhp

Software only. No hardware changes required. Custom ECU calibration on fully standard engine.

  • Custom map written in-house
  • No additional parts needed
  • Fully reversible
02

Stage 2

320-340 bhp

Calibrated for bolt-on modifications. Downpipe, intake and supporting hardware.

  • Requires supporting hardware
  • Mapped to your specific mods
  • Data-logged and validated
03

Stage 3

360+ bhp

Full custom calibration for serious builds. Hybrid turbos, uprated fuelling and bespoke mapping.

  • Hybrid or upgraded turbo
  • Uprated fuel system
  • Bespoke build calibration

Ready to Tune Your 330i?

Get in touch to discuss your build. Every map is written in-house and tailored to your car.

Enquire Now → Back to ECU Remapping →