BMW 3 Series (G20) 2019> 318i 156bhp remap figures
Stock, this 2019> BMW 3 Series petrol (2.0L) produces 156bhp and 250Nm. Our expected figures for a Stage 2 remap are 308bhp and 484Nm, an expected gain of up to 152bhp and 234Nm.
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Stage 2 remap figures
Stage 2 builds on Stage 1 with supporting hardware - typically a freer-flowing intake and exhaust or downpipe - and a remap written around those parts. Stage 2 is intended for off-road or competition use.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 156 bhp | 308 bhp | +152 bhp |
| Torque | 250 Nm | 484 Nm | +234 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 156 bhp | 250 Nm | |
| Stage 2Extra power with supporting parts | 308 bhp | 484 Nm | +152 bhp +234 Nm |
Who is the Stage 2 map for?
- Owners who have fitted, or plan to fit, supporting parts such as a freer-flowing intake and exhaust.
- Enthusiast, track and competition cars: Stage 2 is intended for off-road or competition use.
- Drivers who accept that a bigger gain means more of the car has to be checked and prepared first.
What Stage 2 needs
Stage 2 is written around supporting hardware. For an engine like this one that is typically a freer-flowing intake and a less restrictive exhaust, with the engine in good mechanical order. We confirm the exact parts for your car before any work starts.
- A diagnostic check and a read of your ECU come first.
- We look at the condition of the parts that will carry the extra power before we quote.
- Stage 2 is intended for off-road or competition use.
What this means for your 3 Series
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 Bosch MG1CS201 engine control 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 2 questions
How much power does the Stage 2 map give the BMW 3 Series 318i 156bhp?
We expect 308bhp and 484Nm against 156bhp and 250Nm as standard: up to +152bhp and +234Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
What does a Stage 2 remap need on the BMW 3 Series 318i 156bhp?
Stage 2 assumes supporting hardware. For an engine like this that is typically a freer-flowing intake and a less restrictive exhaust, with the engine in good mechanical order. We confirm the exact parts for your car before any work starts.
Is Stage 2 for road use?
Stage 2 is intended for off-road or competition use. Tell us how the car is used and we will explain what we can and cannot do for it.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.