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EuroLab N55 Custom ECU Tune | M135i & More | F20 F21 F22 F23 F30 F31

SKU: EL-TUNE-N55-STG1

Special Order — 2-3 Weeks Delivery

EuroLab Custom ECU Tune — BMW N55 Twin-Scroll Single Turbo Inline-6

Unlock the full potential of your N55 with a professional custom ECU tune from EuroLab — New Zealand's leading European performance specialists.

Whether you're running a stock turbo setup or a fully built machine, a custom tune delivers power that off-the-shelf maps can't match — tailored specifically to your vehicle, your modifications, and your goals.


Typical N55 Tuning Results

Specification Value
Engine N55 3.0L Twin-Scroll Single Turbo Inline-6
Stock Power 300-326 HP
Stage 1 Custom Tune 380-420 HP / 520-580 Nm
Compatible Models M135i, M235i, M2, 335i F30, 435i, 535i F10, X3 35i, X5 35i
Chassis Codes F20, F21, F22, F23, F30, F31, F32, F33, F36, F10, F11, F25, F26, F15, F87

Why the N55?

  • BMW's workhorse performance engine — found in a huge range of models
  • Twin-scroll single turbo provides smooth power delivery and excellent tuning response
  • Strong gains from Stage 1 ECU tune alone — even more with basic bolt-ons
  • Popular mods: charge pipe, FMIC, downpipe, upgraded intake

Why Choose a Custom Tune?

  • Maximised Power — Unlock the full potential of your upgraded hardware. Every tune is tailored to your specific modifications.
  • Proven Results — EuroLab holds national records for the highest WHP on both stock B58 and stock-engine/stock-turbo S58 platforms. Our tuning expertise is backed by real-world results on the dyno and track.
  • Safe & Reliable — Custom maps retain all OEM safety mechanisms while pushing performance to the limit.
  • Complete DME Remapping — Unlike piggyback modules, MHD performs full ECU flash remapping for maximum performance, safety, and drivability.

How It Works

  1. Purchase Online — Secure your custom tune booking.
  2. Consultation — Our team will discuss your build, modifications, and goals to plan the optimal tune.
  3. Workshop Session — Bring your vehicle to our Auckland workshop. We load the custom tune directly to your ECU using MHD.
  4. Dyno Verification — We verify power gains and ensure safe operating parameters on our in-house dyno.

Important Information

  • This is a service product — tuning is performed at our Auckland workshop.
  • MHD licence and WiFi adapter are NOT included — these are purchased separately.
  • Pricing starts at $2500 NZD but may vary depending on your vehicle and modifications. Contact us to discuss the best options for your build.
  • Tax included in the listed price.

Why EuroLab?

  • 🏆 National record holders — highest WHP on stock B58 and stock-engine/stock-turbo S58 in NZ
  • Authorised MHD reseller and tuners
  • Auckland-based workshop — local expertise, no shipping delays
  • Full support — custom tuning services and ongoing assistance

→ Read our full N55 tuning guide


Authorised MHD reseller and tuners. Support and custom tuning services are available.


EuroLab Workshop Services: eurolab.co.nz — ECU Tuning, Dyno Tuning, Servicing & Repairs for all European vehicles. Book ECU Tuning →