BMW 4 Series (F3X) 2013> 435i 301bhp remap figures
Thinking of remapping a BMW 4 Series 435i 301bhp? The standard car makes 301bhp and 400Nm; with a Stage 1 remap from our Leicester workshop we expect around 385bhp and 541Nm, up to +84bhp and +141Nm.
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 | 301 bhp | 385 bhp | +84 bhp |
| Torque | 400 Nm | 541 Nm | +141 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 301 bhp | 400 Nm | |
| Stage 1Maximum software-only performance | 385 bhp | 541 Nm | +84 bhp +141 Nm |
| Stage 1 EcoPerformance with economy in mind | 364 bhp | 530 Nm | +63 bhp +130 Nm |
| Eco mapEconomy first | 357 bhp | 523 Nm | +56 bhp +123 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.
The ECU recorded for this variant is a Bosch MEVD17.2. 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 4 Series 435i 301bhp?
We expect 385bhp and 541Nm against 301bhp and 400Nm as standard: up to +84bhp and +141Nm. 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 435i 301bhp?
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: 364bhp and 530Nm expected. The Eco map is economy first: 357bhp and 523Nm. Both still sit above the standard 301bhp and 400Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.