BMW 4 Series (G22) 2020> M4 Competition 503bhp remap figures
Thinking of remapping a BMW 4 Series M4 Competition 503bhp? The standard car makes 503bhp and 649Nm; with a Stage 1 remap from our Leicester workshop we expect around 653bhp and 852Nm, up to +150bhp and +203Nm.
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 | 503 bhp | 653 bhp | +150 bhp |
| Torque | 649 Nm | 852 Nm | +203 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 503 bhp | 649 Nm | |
| Stage 1Maximum software-only performance | 653 bhp | 852 Nm | +150 bhp +203 Nm |
| Stage 1 EcoPerformance with economy in mind | 616 bhp | 836 Nm | +113 bhp +187 Nm |
| Eco mapEconomy first | 603 bhp | 826 Nm | +100 bhp +177 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 4 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.
Engine management is by a Bosch MG1CS049 unit. Newer ECUs often protect their software, so we read the exact unit and version on the car before confirming the figures on this page.
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 4 Series M4 Competition 503bhp?
We expect 653bhp and 852Nm against 503bhp and 649Nm as standard: up to +150bhp and +203Nm. 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 4 Series M4 Competition 503bhp?
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: 616bhp and 836Nm expected. The Eco map is economy first: 603bhp and 826Nm. Both still sit above the standard 503bhp and 649Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
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Other petrol variants
All petrol 4 Series (G22) variants · 4 Series (G22) 2020> overview · All BMW figures