Welcome to our category for wiring kits designed for the Cupra Leon ST / Seat Leon ST (from around May 2020). Our kits enable safe, regulation-compliant wiring of your tow bar with tail lights, indicators, brake lights, and power supply. Whether you need a fully featured 13-pin kit or a simpler 7-pin version – we deliver reliable, quality solutions.

Your Benefits with Our Leon ST Wiring Kits

Vehicle-specific & precise fit: Connectors, harness routing and modules are tailored for the Leon ST, often assuming the car has AHK preparation.
13-pin variants with extra features: Reverse light, permanent power, LED trailer lighting, and indicator failure monitoring are included depending on the kit.
CAN-Bus and assistance compatibility: Some wiring kits integrate with the vehicle’s CAN-Bus, allowing functions like disabling parking sensors while towing.
Durable components & weatherproofing: Weather-sealed plugs, quality materials, and robust insulation ensure long service life.
All-in-one, ready to install: Complete kits include socket, harness, mounting hardware and clear instructions.

Technical Notes & What to Check Before Purchase

Confirm whether your Leon ST has AHK preparation – many vehicle-specific sets require it.
If your trailer requires extra functions (LED trailer lights, reverse lights, or permanent power), opt for a 13-pin kit.
Check whether control units (parking sensors, lighting modules) or diagnostics will be affected or need activation after installation.
After fitting, test all lighting circuits: indicators, tail lights, brake lights, and any additional circuits such as reverse light or LED trailer lighting.

How to Order the Right Wiring Kit

Check your Leon ST’s model year & configuration (especially whether AHK preparation is present).
Choose the connector type (13-pin if you want full functionality, or 7-pin for standard use).
Select the wiring kit, add to cart and complete your purchase.
After installation: test functionality; if necessary use diagnostic or workshop tools to unlock or activate features.

Choose a wiring kit from Weltmann KFZ-Teile for your Leon ST and benefit from secure fit, reliable wiring, and full functionality.

FAQ – Frequently Asked Questions about Wiring Kits for Cupra Leon ST

Are vehicle-specific 13-pin wiring kits available for Leon ST?

Yes – 13-pin kits are available specifically for Leon ST from model year 2020 onward.

When should one choose a 7-pin kit instead of 13-pin?

If you only need basic lighting functions such as brake, indicator and tail lights, without extras like reverse light or permanent power.

Is activation or coding required after install?

In some cases yes – particularly on vehicles with parking sensors or electronic modules that detect trailer connection.

Can I install the wiring kit myself?

Yes – with instructions and proper tools installation is possible. For complex setups or advanced electronics, professional fitting is recommended.

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Wiring Kits for Cupra Leon ST – Vehicle-Specific & Fully Functional