BMW M235i F22/F23 N55 ECU Remap & Chip Tuning UK by Nforcd - Stage 1 400bhp / Stage 2 420bhp - Custom Dyno/Rolling Road ECU Flash (OBD/Bench), Remapping Software, Performance Mapping & Tune - BMW 2 Series Midlands Warwickshire

Custom ECU Software Upgrade for BMW M235i F22/F23 N55

Unlock serious, repeatable performance from your turbocharged 3.0 straight-six with our bespoke engine software. Developed and refined on the rolling road in Warwickshire, this BMW M235i F22/F23 N55 ECU flash delivers stronger mid-range punch, sharper pedal response and a cleaner, harder pull to the limiter while keeping factory safety strategies intact.

Stage 1 up to 400 bhp. Stage 2 up to 420 bhp. Proven on our own cars and countless customer vehicles, this calibration offers rapid real-world pace with smooth OEM-like manners for daily driving. If you are searching for BMW 2 Series performance software, N55 ECU flash UK, BMW M235i chip tuning, or a custom rolling road tune in the Midlands, this is exactly what you are after.

Key benefits

• Stage 1: up to 400 bhp with robust torque and silky power delivery
• Stage 2: up to 420 bhp with enhanced response and sustained top-end pull
• Tailored engine software for your exact car, fuel and hardware setup
• Noticeably quicker throttle reaction and more precise boost control
• Refined drivability in town and outstanding pace on the open road
• Dyno proven gains with data-backed adjustments for reliability

What we do during your tune

• Pre-session health check and baseline power run on our rolling road
• Custom map creation with iterative logging and fine-tuning
• Optimisation of boost targets, torque model, spark advance and air-fuel control
• Before and after printouts so you can see the exact improvements
• OBD flashing where supported, or professional bench unlock for later ECUs

Popular software options

• Cold start reduction
• Adjustable overrun burble/crackle
• GTS-style start-up sound profile

Why enthusiasts choose us

• Bespoke BMW M235i N55 engine calibration built on the dyno, not a one-size file
• Used in-house and loved by our customers for its effortless, linear shove
• Safe, sensible tuning that respects factory protections and component limits
• Midlands-based rolling road facility with trusted BMW performance expertise

Who this is perfect for

Drivers searching for BMW M235i ECU flash UK, BMW 2 Series F22/F23 performance software, N55 engine remapping, custom dyno mapping Warwickshire, Midlands BMW tuning, BMW M235i Stage 1 or Stage 2 software, manual or automatic compatible mapping, and reliable daily-drive power upgrades.

Booking and fitting

For installation and dyno calibration, we recommend MJ Modifications in Warwickshire. Request a quote or book your session by emailing info@mjmodifications.co.uk. We welcome owners from across the Midlands including Birmingham, Coventry, Leamington Spa, Stratford-upon-Avon and Rugby.

Power figures are dependent on vehicle condition, supporting hardware and fuel quality. If you are unsure about suitability for your setup, get in touch and we will be happy to advise.