BMW engine platform · N55E
BMW N55 (E-Series) tuning
For the 135i (E82/E88), 335i (E90/E92/E93), X5 xDrive35i (E70) and X6 xDrive35i (E71).
E-series N55 platform calibration with staged options for bolt-ons and turbo upgrades. Strong drivability focus with torque shaping.
- Engine
- 3.0L Single Turbo I6
- Coverage
- 4 models
- Setups
- 3
- Base calibration
- From $300
N55 · E and F chassis are separate platforms
Which N55 does your car have?
The E-Series and F-Series N55 run different DME families, and boost control changed from a pneumatic to an electronic wastegate around 2013-2014. They are separate calibrations, priced separately.
E-Series chassis
- Chassis
- E82 · E88 · E90 · E92 · E93 · E70 · E71
- Model years
- 2011-2014
- Base calibration
- From $300
F-Series chassis
- Chassis
- F87 · F20 · F21 · F22 · F30 · F31 · F32 · F33 · F36 · F10 · F06 · F12 · F13 · F01 · F25 · F26 · F15 · F16
- Model years
- 2011-2019
- Base calibration
- From $400
Cars the BMW N55 (E-Series) is fitted to.
Model, chassis and years for every car on this platform. Where a model has its own page, its name links to it.
F-series N55 cars are a different calibration and live on the N55 (F-Series) page.
| Model | Chassis | Years |
|---|---|---|
| BMW 135i | E82/E88 | 2011-2013 |
| BMW 335iAlso listed under N54 for these years. The VIN confirms which engine. | E90/E92/E93 | 2011-2013 |
| BMW X5 xDrive35i | E70 | 2011-2013 |
| BMW X6 xDrive35iAlso listed under N54 for these years. The VIN confirms which engine. | E71 | 2011-2014 |
N55 (E-Series) setups and pricing.
Each price is the base calibration, from the live catalogue. Fuel and hardware are listed as published for each setup.
Choose a setup to carry it into Find Your Tune, or continue with N55E and choose there.
Continue with N55EAdd-ons
From the catalogue. Where the price depends on the setup, each is listed.
- Additional Maps
- Stock Turbo $150 · Hybrid Turbo $200 · Big Single Turbo $200
- Flex Fuel
- $150
- Rush Delivery
- $100, any order
The N55 (E-Series), technically.
Predictable torque delivery, clean boost control, and repeatable revisions via logs.
- Engine
- 3.0L Single Turbo I6
- Generation
- E-Series chassis
- Fuels published
- 91 · 93 · E30 · E50
- Flash software
- MHD, bootmod3 or another supported OBD tool, confirmed at quote
- Transmission
- TCU calibration for ZF 8HP and DCT where software support exists
- Delivery
- Remote, worldwide
Calibrated from your logs.
No dyno appointment. You flash a base calibration, log the car and send it back, then we read the data and revise until it is clean.
- 01
Submit your build
Chassis, engine, full mod list and target fuel. This defines a safe calibration starting point before any file is touched.
- 02
Receive a base map
A conservative calibration matched to your hardware and fuel, flashed with your own software at home.
- 03
Log and send back
Full-throttle pulls and part-throttle data captured on our channel list, then sent over for review.
- 04
Review and revise
We read the logs, adjust the calibration and repeat until the car is running clean and on target.
Guides and related pages.
Technical reading for the N55 (E-Series), and the pages around it.
- Tune pathBMW N55 Stage 1 TuneN55 Stage 1 is a custom ECU calibration on the stock turbo and stock exhaust. What it changes, why the E-series and F-series cars differ, and what to log.
- Tune pathBMW N55 Stage 2 Tune (Downpipe)N55 Stage 2 is the downpiped calibration: lower backpressure, re-scaled wastegate control, and an intercooler that becomes the real limit on repeat pulls.
- Tune pathBMW N55 E30 TuneAn N55 E30 calibration trades fuel flow for knock margin. What changes in the map, what the direct-injection fuel system limits, and how to mix a repeatable blend.
- Tune pathBMW N55 Big Turbo TuneA big-turbo N55 calibration is written from the hardware outward: boost control for a turbo the DME has never seen, a rebuilt torque model, fuelling as the ceiling.
- Tune pathN54 vs N55 Tune Guide | Which BMW Inline-6 Is Better to Tune?Compare N54 and N55 tuning potential, spool, fueling limits, reliability, and common upgrade paths.
- GuideB58 vs N55 vs S55: Platform OverviewQuick pros/cons and tuning considerations when choosing a BMW turbo platform.
N55 (E-Series) questions.
More answers- Which cars use the N55 (E-Series)?
- BMW 135i (E82 / E88, 2011-2013), BMW 335i (E90 / E92 / E93, 2011-2013), BMW X5 xDrive35i (E70, 2011-2013) and BMW X6 xDrive35i (E71, 2011-2014). Some of these chassis are also listed under the N54 for the same years, so the VIN confirms which engine a car has. F-series N55 cars are a different calibration and live on the N55 (F-Series) page.
- How much does an N55 (E-Series) tune cost?
- Stock Turbo $300, Hybrid Turbo $350 and Big Single Turbo $400, from the Synergy catalogue. Add-ons: Additional Maps $150–$200, Flex Fuel $150.
- Which fuels does each N55 (E-Series) setup support?
- Stock Turbo: 91 or 93. Hybrid Turbo: 91, 93 or E30. Big Single Turbo: 93 or E50.
- Is an N55 (E-Series) tune the same as an N55 (F-Series) tune?
- No. The E-Series and F-Series N55 run different DME families, and boost control changed from a pneumatic to an electronic wastegate around 2013-2014. They are separate calibrations, priced separately.
Built around your N55 (E-Series).
Your chassis and year confirm the platform. Your hardware and fuel set the calibration. Your logs set every revision.