BMW 135i & 335i (N54 3.0L Twin Turbo) Remapping – Stage 1 & Stage 2
Unlock the full potential of your BMW 135i or 335i (N54 3.0L Twin Turbo) with Onyx Performance, the UK’s leading BMW tuning specialists. Our Stage 1 and Stage 2 ECU and gearbox remapping is dyno-developed in-house, ensuring maximum performance, reliability, and efficiency.
Why Choose Onyx Performance?
✔ Dyno-Proven Custom Tuning – Precision ECU calibration for optimal power, torque, and drivability
✔ Stage 1 & Stage 2 Remaps – Enhanced throttle response, turbo efficiency, and fuel economy
✔ Comprehensive Testing & Data Logging – Ensuring safe and reliable tuning results
✔ BMW N54 Twin-Turbo Specialists – Extensive experience tuning high-performance BMW engines
✔ Optional Gearbox Software Upgrades – Optimised shift speed, torque handling, and response
BMW 135i & 335i (N54) – Stage 1 & Stage 2 Power Gains
Stage 1 Remap – Maximum Power on Stock Hardware
✔ Stock Power: 301HP – 400Nm
✔ Stage 1 Remap: 370HP – 490Nm
✔ Hardware Required: None
The Stage 1 remap enhances power and torque without requiring any modifications. It improves turbo spool, throttle response, and gear shifts, while maintaining factory reliability.
Stage 2 Remap – Maximum Gains with Supporting Mods
✔ Stock Power: 301HP – 400Nm
✔ Stage 2 Remap: 390+HP – 510+Nm*
✔ Hardware Required:
- Decat Downpipe or High-Flow Sports Catalyst
- Upgraded Air Intake System
- Larger Intercooler
- Cat-Back Exhaust System (Optional but Recommended)
- Onyx Performance Stage 2 Gearbox Software (Recommended for automatic models)
Stage 2 tuning enhances airflow and cooling efficiency, allowing for higher power gains, improved throttle response, and increased turbo efficiency.
Looking for more power? Contact us to discuss custom Stage 3 hybrid turbo setups for extreme performance builds.
Onyx Performance – BMW 135i & 335i (N54) Remap Service Includes:
✔ Rolling Road (Dyno) Session – Accurately measures before and after performance gains
✔ Before & After Power Printouts – Detailed dyno reports for transparency
✔ Engine Smoke Test – Detects boost or vacuum leaks before tuning
✔ Catalyst Efficiency Fault Code Delete (Optional)
✔ Sport Mode Overrun Crackles (Optional) – Aggressive exhaust sound enhancement
✔ Speed Limiter Removal – Unlocks factory speed restrictions
✔ Comprehensive Diagnostic Check – Ensures optimal engine health before tuning
Servicing & Maintenance for BMW N54 Twin-Turbo Models
Regular servicing and maintenance are essential for maximising reliability and performance in BMW 135i & 335i models. At Onyx Performance, we offer:
? Routine Servicing – Oil & filter changes, spark plug upgrades, and turbo maintenance
? Turbo System Inspections – Checking for boost leaks, wastegate rattle, and turbo health
? Fuel System Cleaning – Ensuring optimal injector and fuel pump performance
? Suspension & Handling Checks – For improved ride stability and control
? Diagnostics & Fault Code Reading – Identifies potential issues before they escalate
We also provide digital service history updates to maintain accurate maintenance records for your BMW.
Vehicle Security – Protect Your BMW from Theft
BMW models, especially high-performance variants like the 135i & 335i, are frequently targeted by thieves. We offer cutting-edge vehicle security solutions, including:
? Autowatch Ghost Immobilisers – Prevents key cloning and unauthorised engine starts
? MetaTrak GPS Trackers – Live tracking and monitoring via mobile app
? Scorpion Track Systems – Motion alerts and driver recognition for enhanced security
? Fleet Tracking Solutions – Ideal for owners managing multiple high-value vehicles
All security systems are professionally installed for seamless protection.
Why Onyx Performance is the Best Choice for BMW N54 Tuning?
✔ BMW N54 Twin-Turbo Tuning Specialists – Years of experience optimising turbocharged BMWs
✔ Dyno-Tested Results – Every remap is developed in-house for guaranteed accuracy and reliability
✔ Safe & Efficient Tuning – Enhancing power while maintaining engine longevity
✔ Complete Performance Solutions – From Stage 1 remaps to full custom builds
✔ Flexible Finance Options – Spread the cost of your remap, servicing, or security upgrades
Book Your BMW 135i or 335i Remap or Servicing Today!
? Onyx Performance – Slough, Berkshire – The UK’s leading BMW performance tuning specialists. Whether you need Stage 1 or Stage 2 tuning, turbo servicing, or advanced vehicle security, we have the expertise to elevate your BMW 135i or 335i to the next level.
? Contact us today to book your tuning service!
? Unlock the full potential of your BMW N54 twin-turbo with Onyx Performance! ?