BMW X4 (G02) 2019> M40d MH 340bhp remap figures
Thinking of remapping a BMW X4 M40d MH 340bhp? The standard car makes 340bhp and 700Nm; with a Stage 1 remap from our Leicester workshop we expect around 417bhp and 805Nm, up to +77bhp and +105Nm.
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 | 340 bhp | 417 bhp | +77 bhp |
| Torque | 700 Nm | 805 Nm | +105 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 340 bhp | 700 Nm | |
| Stage 1Maximum software-only performance | 417 bhp | 805 Nm | +77 bhp +105 Nm |
| Stage 1 EcoPerformance with economy in mind | 398 bhp | 797 Nm | +58 bhp +97 Nm |
| Eco mapEconomy first | 392 bhp | 791 Nm | +52 bhp +91 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your X4
On a diesel the biggest change is normally torque: the remap changes how much fuel and boost the ECU allows across the rev range, so pulling power arrives earlier and holds on longer.
Engine management is by a Bosch MD1CP032 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 X4 M40d MH 340bhp?
We expect 417bhp and 805Nm against 340bhp and 700Nm as standard: up to +77bhp and +105Nm. 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 X4 M40d MH 340bhp?
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: 398bhp and 797Nm expected. The Eco map is economy first: 392bhp and 791Nm. Both still sit above the standard 340bhp and 700Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More BMW X4 figures
Other diesel variants
All diesel X4 (G02) variants · X4 (G02) 2018> overview · All BMW figures