Iveco Stralis 2007> 10.3l S42 420bhp remap figures
Thinking of remapping a Iveco Stralis 10.3l S42 420bhp? The standard car makes 420bhp and 1900Nm; with a Stage 1 remap from our Leicester workshop we expect around 485bhp and 2134Nm, up to +65bhp and +234Nm.
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 | 420 bhp | 485 bhp | +65 bhp |
| Torque | 1900 Nm | 2134 Nm | +234 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 420 bhp | 1900 Nm | |
| Stage 1Maximum software-only performance | 485 bhp | 2134 Nm | +65 bhp +234 Nm |
| Stage 1 EcoPerformance with economy in mind | 469 bhp | 2115 Nm | +49 bhp +215 Nm |
| Eco mapEconomy first | 464 bhp | 2104 Nm | +44 bhp +204 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 Stralis
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.
This car is listed with a Bosch EDC7U31 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 Iveco Stralis 10.3l S42 420bhp?
We expect 485bhp and 2134Nm against 420bhp and 1900Nm as standard: up to +65bhp and +234Nm. 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 Iveco Stralis 10.3l S42 420bhp?
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: 469bhp and 2115Nm expected. The Eco map is economy first: 464bhp and 2104Nm. Both still sit above the standard 420bhp and 1900Nm.
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 Iveco Stralis figures
Other diesel variants
- 10.3l S40 400bhp 2001-2007
- 10.3l S45 450bhp 2007>
- 7.8l S36 360bhp 2007>
- 12.9l S48 480bhp 2001-2007
- 7.8l S35 350bhp 2001-2007
- 12.9l S50 500bhp 2007>
- 7.8l S33 330bhp 2007>
- 7.8l S31 310bhp 2007>
- 12.9l S54 540bhp 2001-2007
- 12.9l S56 560bhp 2007>
All diesel Stralis variants · Stralis 2001> overview · All Iveco figures