Volvo S40 2004-2012 1.8 123bhp remap figures
The Volvo S40 1.8 123bhp (2004-2012) is a petrol 1.8L model making 123bhp and 165Nm as standard. After a Stage 1 ECU remap we expect 136bhp and 181Nm - up to 13bhp and 16Nm more than stock.
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 | 123 bhp | 136 bhp | +13 bhp |
| Torque | 165 Nm | 181 Nm | +16 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 123 bhp | 165 Nm | |
| Stage 1Maximum software-only performance | 136 bhp | 181 Nm | +13 bhp +16 Nm |
| Stage 1 EcoPerformance with economy in mind | 133 bhp | 180 Nm | +10 bhp +15 Nm |
| Eco mapEconomy first | 132 bhp | 179 Nm | +9 bhp +14 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 S40
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.
This car is listed with a Melco MH72XX engine control unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
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 Volvo S40 1.8 123bhp?
We expect 136bhp and 181Nm against 123bhp and 165Nm as standard: up to +13bhp and +16Nm. 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 Volvo S40 1.8 123bhp?
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: 133bhp and 180Nm expected. The Eco map is economy first: 132bhp and 179Nm. Both still sit above the standard 123bhp and 165Nm.
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 Volvo S40 figures
Other petrol variants
All petrol S40 variants · S40 2004-2012 overview · All Volvo figures