Your Vehicle
Seat Leon 1.6 TDI 105hp
Technical Specifications
Power and torque increase
Stage 1: software remap only, no mechanical changes, fully reversible. Stage 2: remap combined with downpipe / sports air filter.
Stage 1: file 100 € online + installation 350 € at the workshop (via the OBD port) Book now Stage 2: quoted on request Ask for a quote
Power HP
Torque Nm
Buy the Stage 1 file, pay the installation at the workshop
100 € VAT included: the file developed for your engine, paid online
Installation: 350 € network price, the workshop may charge less, paid at the chosen workshop (via the OBD port) · terms
Power Graph · Stage 1
Seat Leon 1.6 TDI 105hp: da 105 a 140HP
Values for Stage 1 (change the stage from the control above)
Remapping Seat Leon
MasterTuning develops remapping for Seat. La Seat Leon 1.6 TDI 105hp può passare da 105 HP a 140 HP con un incremento di 35 HP.
The development of each remap is customized by MasterTuning.
- 100% customised files with lifetime warranty
- Reference values for Stage 1: the file is developed on your vehicle and checked in the workshop
- Best performance, within safety margins
- Reduced fuel consumption
ECU Remapping Details Seat Leon 1.6 TDI 105hp
The Seat Leon 1.6 TDI 105hp is equipped with a diesel engine that produces 105 HP and 250 Nm of torque in its factory configuration. With MasterTuning's professional ECU remapping, this Seat can achieve 140 HP (+33%) and 320 Nm (+28%).
Our Stage 1 tuning for the Leon 1P - 2005 - 2012 delivers an impressive gain of +35 HP and +70 Nm, optimizing the diesel engine's performance while maintaining reliability and staying within safe parameters.
The engine code CAYC identifies this specific powerplant configuration. The Siemens/Continental PCR 2.1 ECU is professionally recalibrated to unlock hidden potential while preserving engine longevity.
As a diesel engine, this Seat responds exceptionally well to ECU tuning. Owners typically report improved throttle response, smoother power delivery, and in many cases, better fuel efficiency under normal driving conditions.
Technical Specifications — Seat Leon 1.6 TDI 105hp
Factory technical data for the Seat Leon 1.6 TDI 105hp (1P - 2005 - 2012), used by MasterTuning engineers to develop a remap tailored to this specific powerplant. Figures shown are reference values for Stage 1; the file is developed on your vehicle and checked in the workshop.
| Engine code | CAYC |
|---|---|
| ECU / Control unit | Siemens/Continental PCR 2.1 |
| Fuel | Diesel |
| Compression ratio | 16.5 |
| Bore × stroke | 79.5 X 80.5 mm |
| Stock power | 105 HP · 250 Nm |
| Remapped power (Stage 1) | 140 HP (+35) · 320 Nm (+70) |
Don't want to touch the ECU?
Rapid Dimsport add-on modules connect to the engine sensors with original connectors: they fit in a few hours and come off without a trace, leaving the factory software untouched. Useful on a leased car, one still under warranty or one you plan to sell soon. Check which ones fit your Seat Leon.
Frequently Asked Questions - Seat Leon
How much power can I gain from remapping my Seat Leon?
With MasterTuning Stage 1, your Seat Leon 1.6 TDI 105hp can gain +35 HP (from 105 to 140 HP) and +70 Nm of torque. This represents a 33% increase in power.
Which ECU does the Seat Leon 1.6 TDI 105hp use?
The Seat Leon 1.6 TDI 105hp uses the Siemens/Continental PCR 2.1 engine control unit. MasterTuning recalibrates this ECU for Stage 1 and Stage 2.
What is the engine code of the Seat Leon 1.6 TDI 105hp?
The engine code of the Seat Leon 1.6 TDI 105hp is CAYC. You can find it in the vehicle documents or on the engine plate.
Is ECU remapping safe for the Seat Leon engine?
Yes, MasterTuning's remapping for the Seat Leon 1.6 TDI 105hp is developed within safe parameters. Each file is developed on your vehicle, checked in the workshop and stays within the mechanical limits of the CAYC engine.
Is the Seat ECU remapping reversible?
Absolutely. The original factory calibration of your Seat Leon is always backed up before remapping. The process is 100% reversible at any time.
Will remapping affect my Seat warranty?
ECU remapping may affect your manufacturer warranty. We recommend checking your specific warranty terms. Many of our customers choose to remap after the warranty period or accept this trade-off for the significant performance gains.
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Book your remap or ask for a quote
Stage 1 can be bought online and is done at the workshop you choose; for Stage 2 we send you a quote.
Stage 2 is quoted on request: write to us and we will reply with price and timing.
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