Smart Forfour 2004-2006 1.5 CDI 68bhp remap figures
Stock, this 2004-2006 Smart Forfour diesel (1.5L) produces 68bhp and 160Nm. Our expected figures for a Stage 1 remap are 120bhp and 290Nm, an expected gain of up to 52bhp and 130Nm.
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 | 68 bhp | 120 bhp | +52 bhp |
| Torque | 160 Nm | 290 Nm | +130 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 68 bhp | 160 Nm | |
| Stage 1Maximum software-only performance | 120 bhp | 290 Nm | +52 bhp +130 Nm |
| Stage 1 EcoPerformance with economy in mind | 107 bhp | 280 Nm | +39 bhp +120 Nm |
| Eco mapEconomy first | 103 bhp | 273 Nm | +35 bhp +113 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 Forfour
Diesel remaps work mainly on boost pressure, fuel delivery and torque limiters, which is why the Nm gain is usually the figure you feel in everyday driving, particularly when overtaking or towing.
This car is listed with a Bosch EDC16C31 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 Smart Forfour 1.5 CDI 68bhp?
We expect 120bhp and 290Nm against 68bhp and 160Nm as standard: up to +52bhp and +130Nm. 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 Smart Forfour 1.5 CDI 68bhp?
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: 107bhp and 280Nm expected. The Eco map is economy first: 103bhp and 273Nm. Both still sit above the standard 68bhp and 160Nm.
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 Smart Forfour figures
Other diesel variants
All diesel Forfour variants · Forfour 2004-2006 overview · All Smart figures