BMW 1 Series (F2X) 2011> M135i 315bhp remap figures
Stock, this 2011> BMW 1 Series petrol (3.0L) produces 315bhp and 450Nm. Our expected figures for a Stage 1 remap are 408bhp and 566Nm, an expected gain of up to 93bhp and 116Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 315 bhp | 408 bhp | +93 bhp |
| Torque | 450 Nm | 566 Nm | +116 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 315 bhp | 450 Nm | |
| Stage 1Maximum software-only performance | 408 bhp | 566 Nm | +93 bhp +116 Nm |
| Stage 1 EcoPerformance with economy in mind | 385 bhp | 557 Nm | +70 bhp +107 Nm |
| Eco mapEconomy first | 377 bhp | 551 Nm | +62 bhp +101 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your 1 Series
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
The ECU recorded for this variant is a Bosch MEVD17.2.G. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the BMW 1 Series M135i 315bhp?
We expect 408bhp and 566Nm against 315bhp and 450Nm as standard: up to +93bhp and +116Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the BMW 1 Series M135i 315bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 385bhp and 557Nm expected. The Eco map is economy first: 377bhp and 551Nm. Both still sit above the standard 315bhp and 450Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.