SEAT Leon (1P) 2005-2012 1.2 TSI 103bhp remap figures
Stock, this 2005-2012 SEAT Leon petrol (1.2L) produces 103bhp and 175Nm. Our expected figures for a Stage 1 remap are 137bhp and 222Nm, an expected gain of up to 34bhp and 47Nm.
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 | 103 bhp | 137 bhp | +34 bhp |
| Torque | 175 Nm | 222 Nm | +47 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 103 bhp | 175 Nm | |
| Stage 1Maximum software-only performance | 137 bhp | 222 Nm | +34 bhp +47 Nm |
| Stage 1 EcoPerformance with economy in mind | 129 bhp | 218 Nm | +26 bhp +43 Nm |
| Eco mapEconomy first | 126 bhp | 216 Nm | +23 bhp +41 Nm |
Who is the Stage 1 map for?
- Drivers who want a noticeably quicker car from a software-only change, with no new parts.
- Daily drivers who want stronger mid-range pull and a sharper throttle.
- Anyone who wants the biggest gain we list without fitting hardware.
What this means for your Leon
On a turbocharged petrol engine a remap adjusts boost, ignition timing and fuelling together, so both power and mid-range torque rise and the car pulls harder out of corners and junctions.
Engine management is by a Siemens Simos 10 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 SEAT Leon 1.2 TSI 103bhp?
We expect 137bhp and 222Nm against 103bhp and 175Nm as standard: up to +34bhp and +47Nm. 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 SEAT Leon 1.2 TSI 103bhp?
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: 129bhp and 218Nm expected. The Eco map is economy first: 126bhp and 216Nm. Both still sit above the standard 103bhp and 175Nm.
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 SEAT Leon figures
Other petrol variants
- 1.6 100bhp 2005-2012
- 1.4 83bhp 2005-2012
- 1.4 TSI 123bhp 2005-2012
- 2.0 FSI 147bhp 2005-2012
- 1.8 TSI 157bhp 2005-2012
- 2.0 TFSI 182bhp 2005-2012
- 2.0 TFSI 197bhp 2005-2012
- 2.0 TFSI 208bhp 2005-2012
- 2.0 TFSI 236bhp 2005-2012
- 2.0 TFSI 261bhp 2005-2012
All petrol Leon (1P) variants · Leon (1P) 2005-2012 overview · All SEAT figures