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BMW 135i E82/E88 ECU Remapping

BMW 135i E82/E883.0 N54/N55 · 2007–2013

Stage 1 £349

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4.9/5500+ Google ReviewsSee Google Reviews

The BMW 135i E82/E88 (2007 to 2013) leaves the factory with 306 PS and 400 Nm from its 3.0 petrol engine. Our Stage 1 estimate takes it to 370 PS and 520 Nm, roughly 21% more power and 30% more torque.

Stage 1 price

£349

Stage 1 ECU remap

Estimated gain

+64 PS · +120 Nm

Power

Stock
306 PS
Stage 1
370 PS

Torque

Stock
400 Nm
Stage 1
520 Nm

Figures are STX Tuning estimates for a healthy standard car, not a dyno result for your vehicle. Power is shown in PS. These are existing vehicle library estimates, not independently measured results.

Where would you like it done?
01753 439130
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More BMW tuning

1 Series F20/F21

118i 1.6 Petrol

1M Coupe E82

1M Coupe 3.0 Petrol

3 Series G20/G21

320d 2.0 Diesel

3 Series F30/F31

320d 2.0 Diesel

3 Series F30/F31

330i 2.0 Petrol

330d E90/E91/E92

330d 3.0 Diesel

330d F30/F31

330d 3.0 Diesel

330d G20/G21

330d 3.0 Diesel

What we do

More than just ECU remapping.

From Stage 1 and Stage 2 ECU remapping to gearbox tuning and supporting performance upgrades, STX Tuning offers specialist vehicle software and tuning services for compatible petrol and diesel cars and vans.

Explore the available options for your exact vehicle at our Slough workshop, with suitable mobile ECU remapping appointments available across selected surrounding areas.

Not sure which tuning service you need?

Tell us what you drive and what you'd like to achieve. We'll check your vehicle and help you explore the available options.

4.9/5 | 500+ Google Reviews
Get my tuning quoteCall STX Tuning: 01753 439130

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Google Customer Reviews

What BMW Owners Say

See what customers say about their experience with STX Tuning.

Google Reviews

4.9

535 Google Reviews

  • Jamiah Woodroffe

    Apr 2026

    Really five star service I’ve only got my car the day before I messaged on a Sunday just as an inquiry was more than Happy to take time of the day on a Sunday to fit me in last minute just want to think the whole team very professional and I absolutely love my car. I felt an instant power boost and explained everything to me and packages that I can definitely most likely in the future upgrade to will be definitely coming again.

    Posted on Google · view on our Google profile

  • Tracy

    Jan 2026

    Amazing company, arrived within 2 hours of my call and fixed the problem where another garage had failed. So happy to have the issue resolved, technician was so nice and explained everything, excellent service, highly recommend STX Tuning

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  • Jake Bickmore

    Dec 2025

    STX Tuning were absolutely brilliant. The service was super fast — same day turnaround — and they solved an issue with my car that a main dealer claimed would cost me thousands to fix. It turned out the expensive repair wasn’t even necessary, and STX handled it quickly and professionally. Honest, efficient, and highly recommended!

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  • Matthew Mooney

    Nov 2025

    STX were great! (its within ONYX which confused me when I got there, no biggy, just for anyone else reading it). I happened to be arriving when a guy must have been starting their shift, super helpful and got me to the right person. On the way in they even took the time to show my son the Lambo they had, this type of service is so nice to receive. The young guy we spotted fitting the wheels later on, thank you! In for a Stage 1 remap, all done in 30 minutes, and car drives brilliantly and exceeded expectations. Also at a great price as well. All staff I met were super nice and helpful. Credit to you guys! I will definitely be choose these guys going forward! Highly recommend.

    Posted on Google · view on our Google profile
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