BMW Z4 (E89) 2009> 23i 201bhp remap figures
Thinking of remapping a BMW Z4 23i 201bhp? The standard car makes 201bhp and 250Nm; with a Stage 1 remap from our Leicester workshop we expect around 222bhp and 276Nm, up to +21bhp and +26Nm.
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 | 201 bhp | 222 bhp | +21 bhp |
| Torque | 250 Nm | 276 Nm | +26 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 201 bhp | 250 Nm | |
| Stage 1Maximum software-only performance | 222 bhp | 276 Nm | +21 bhp +26 Nm |
| Stage 1 EcoPerformance with economy in mind | 217 bhp | 274 Nm | +16 bhp +24 Nm |
| Eco mapEconomy first | 215 bhp | 273 Nm | +14 bhp +23 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 Z4
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
This car is listed with a Siemens MSV80 engine control unit. 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 Z4 23i 201bhp?
We expect 222bhp and 276Nm against 201bhp and 250Nm as standard: up to +21bhp and +26Nm. 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 Z4 23i 201bhp?
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: 217bhp and 274Nm expected. The Eco map is economy first: 215bhp and 273Nm. Both still sit above the standard 201bhp and 250Nm.
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 Z4 figures
Other petrol variants
All petrol Z4 (E89) variants · Z4 (E89) 2009-2016 overview · All BMW figures