Every MK6IX harness is handmade to order, and orders are processed in the order they are received. Please allow 10 to 15 calendar days for production before your order ships. These are calendar days, not business days. Shipping transit time is additional and depends on the service you choose at checkout.

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Harnesses are handmade one at a time, in the order they are received. Nothing is pulled off a shelf: the connectors, terminals and wiring for your application are assembled when your order comes up in the queue. If you ordered less than 15 days ago, your harness is most likely still in production.

Tracking information is emailed when your order is prepared for shipment. A shipping label being created does not necessarily mean the carrier has received the package yet; tracking updates once the carrier scans it.

Please check your original order date before requesting an update. If it has been more than 15 days and you have not received tracking, email John@mk6ix.com with your order number.

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Tracking is emailed automatically when your order is ready to ship. If you cannot find it, check your spam or junk folder first. If the harness is still inside the 10 to 15 day production window, tracking does not exist yet.

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Made to order. Each harness is assembled with the connectors, terminals and wiring for its specific application, which is why nothing sits on a shelf.

Individual components, especially specialized automotive connectors and terminals, can occasionally become unavailable or back-ordered. A component shortage can affect production time for the harnesses that use that part.

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Every harness is designed, built and tested by hand in Toronto, Canada. We do not dropship generic pre-made harnesses.

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Yes, MK6IX ships worldwide. Shipping options and cost are calculated at checkout from the delivery address.

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You can request an address change before your order ships. Email John@mk6ix.com as soon as possible with your order number and the new address. Changes are subject to confirmation, and cannot be guaranteed once the package has been dispatched.

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Returns: you can return a harness within 30 days of delivery for a full refund. If we sent the wrong item or it is defective, we cover the return shipping. If the wrong part was ordered, the buyer pays return shipping and the original shipping cost is not refunded.

Cancellations: contact us with your order number to request a cancellation. Whether an order can be cancelled depends on its status at the time.

Full details are on the Returns & Policies page.

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For the supported vehicles, usually the 14 pin to 10 pin conversion harness. Factory bi-xenon headlights use a 14 pin connector and compatible aftermarket headlights use a 10 pin connector. The harness plugs into the car's 14 pin connector and provides the 10 pin connection the new headlights expect, with the factory wiring left intact.

This applies to the supported vehicles and lighting configurations, not to every Volkswagen or Audi model. Before ordering, confirm two things: that your car has the factory 14 pin bi-xenon headlight connector, and that your replacement headlights use the 10 pin connector. Check the fitment list on the MK7 14 pin to 10 pin harness or the MK6 14 pin to 10 pin harness, or send your VIN and connector photos first.

Product: MK7 Headlight Harness (14 Pin to 10 Pin Conversion)  ·  Link to this answer

The first number is the connector on your car's factory wiring. The second is the connector on the headlights you are installing. For the applicable MK6 and MK7 conversions:

10 pin to 14 pin generally means converting factory halogen wiring to compatible OEM bi-xenon headlight assemblies.

14 pin to 10 pin generally means converting factory bi-xenon wiring to compatible aftermarket headlights that use a 10 pin connector.

The two harnesses are not interchangeable. The electrical functions and pin assignments on each side are different, and the harness is built to map one specific configuration to the other. A connector with the right number of pins is not enough on its own: an OEM LED assembly, for example, is not compatible just because it has a 14 pin connector. See the MK7 10 pin to 14 pin, MK7 14 pin to 10 pin, MK6 10 pin to 14 pin and MK6 14 pin to 10 pin harnesses.

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Basic headlight functionality does not require coding for the supported MK7 conversion. The installation does have to be completed correctly, which includes the additional fused power connection for the high beam circuit. Plugging in the two main headlight connectors alone does not complete the installation; follow every step in the installation guide on the product page.

AFS and automatic levelling warning removal is a separate coding procedure. The car may keep AFS related warnings until those functions are coded out. The warning does not necessarily prevent basic headlight operation.

Product: MK7 Headlight Harness (14 Pin to 10 Pin Conversion)  ·  Link to this answer

The factory MK5 xenon headlight assembly uses a Hella 12 pin connector. A conventional plug and play conversion would need a matching female connector housing to plug into the car side, and that connector is not readily available for aftermarket harness manufacturing.

Rather than build an adapter around an unsuitable or unreliable connector, MK6IX supplies the MK5 12 pin to 10 pin conversion as a hardwire kit. The car side of the harness is wired into the factory headlight wiring following the installation guide, and the 10 pin end still plugs straight into the replacement headlight.

Product: MK5 Headlight Harness (12 Pin to 10 Pin Hardwire Conversion)  ·  Link to this answer

VLAND headlights can use different DRL pin assignments from factory Volkswagen headlights. A conventional OEM style adapter is wired for the factory assignment, so it may not operate the VLAND DRLs correctly even though it plugs in.

The MK6IX VLAND headlight harness is designed for the supported VLAND wiring configuration. Check the product page to confirm your headlights are the supported version before ordering.

Product: VLAND Headlight Harness (10 Pin to 10 Pin Conversion)  ·  Link to this answer

The factory MK7 bi-xenon headlights use a shutter based high beam system, which operates differently from the high beam circuit required by compatible aftermarket 10 pin headlights.

The MK6IX conversion harness includes dedicated circuit modules that manage the high beam trigger and provide the necessary electrical control.

These modules require an additional fused power connection, installed using the supplied add-a-fuse lead.

This connection is necessary for proper high beam functionality and allows the conversion to operate without cutting or modifying the original factory headlight wiring.

The installation guide provides the connection location and installation procedure.

Product: MK7 Headlight Harness (14 Pin to 10 Pin Conversion)  ·  Link to this answer

Not with a plug and play adapter. MK7.5 facelift headlights are not just a different connector arrangement. The facelift lighting system uses different electronics and communication requirements, including functions controlled over CAN and LIN, so a conventional adapter harness is not sufficient.

Depending on the exact equipment on the car and the headlights, a successful conversion may require additional modules, wiring, coding and dataset programming.

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NAR means North American Region. ROW means Rest of World, which for these conversions usually means European specification taillights.

European taillights commonly use separate amber turn signals, while North American assemblies commonly use red turn signals. Depending on the vehicle, other differences can include rear fog functions, side markers and the internal wiring assignments. Because the harness has to match the car's wiring to the functions inside the lights, a harness is built for one configuration or the other.

Choose the harness based on the actual taillight assemblies you are installing, not just the model year. If you are unsure which lights you have, send photos of the lights and connectors through the contact form.

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Usually none. Newer VLAND taillight sets commonly include interchangeable connectors for both MK7 and MK7.5 applications. MK7 vehicles use the original black 4 pin and 5 pin taillight connections; MK7.5 vehicles use blue 8 pin connections. Use the interchangeable connectors supplied with your VLAND taillights that match your car, and a separate MK6IX conversion harness is generally unnecessary.

If you bought used taillights or an incomplete set, check which adapters are included before assuming you have everything.

This is different from installing genuine OEM MK7.5 taillights on a MK7, which does need the MK7 to MK7.5 harness built for those lights (NAR, European Lowline or European Highline). See the taillight harnesses category.

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They look alike but they are three different taillight configurations.

European Lowline LED taillights use conventional amber turn signals. European Highline LED taillights have dynamic (sequential) amber turn signals and different control requirements. North American LED taillights use the North American lighting configuration, typically with red turn signals.

These assemblies differ in their electrical functions, internal wiring and the coding they need, so a harness built for one would not drive the others correctly. That is why MK6IX offers a separate MK7 to MK7.5 conversion harness for each configuration: European Lowline, European Highline dynamic LED and NAR. Check the part numbers on your actual taillights before ordering.

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It depends on the actual taillight conversion. Some taillight harnesses need no coding; the MK7 to MK7.5 conversions have application specific coding requirements that differ between configurations. There is no single coding procedure for all taillight harnesses. The installation guide for each harness lists the required changes for that conversion.

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Most MK6IX harnesses are plug and play: the harness plugs in between the factory connector and the new part, and the factory wiring stays intact. Not every product is, though. Some conversions require additional electrical connections, coding, dataset programming or connector modifications. Review the product page and installation guide for the specific harness before you order.

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Most MK6IX harnesses are designed to preserve the factory wiring without cutting or splicing, so the conversion is reversible. There are exceptions, and they are stated on the product page:

The MK5 12 pin to 10 pin headlight conversion is a hardwire kit.

The MK8 European hardwire taillight conversion requires additional wiring connections at the CECM.

Certain MK7 to MK7.5 taillight conversions require minor connector keyway trimming for fitment.

The MK7 14 pin to 10 pin headlight conversion requires an additional fused electrical connection for the high beam circuit.

Whatever a product needs beyond plugging in is spelled out on its product page and in its installation guide.

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Installation and coding guides are available through the applicable product pages, as a "Download Installation Guide (PDF)" link in the product description. Some products also have an install video on the page. Read the guide before you start. Browse the shop to find your product.

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It depends on the product and on the vehicle's equipment. Some harnesses work with no coding at all. Others are part of a retrofit that needs changes in the car's control modules, for example turning off AFS or headlight levelling after a headlight swap so no faults are stored. The product page and installation guide tell you whether coding is required for that harness.

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Volkswagen and Audi control modules are told what equipment is fitted through their software configuration. There are three levels of change:

Coding tells a module which functions are installed or removed (for example, that AFS is no longer fitted). Adaptations change individual settings within a module. VCDS and OBDeleven are commonly used for supported Volkswagen and Audi coding and adaptations.

Dataset programming writes a dataset or parameter file into a module. Coding alone cannot do this. ODIS is Volkswagen's dealer diagnostic and programming software, and it supports dataset programming among other functions.

Some advanced retrofits need a dataset. The MK8 European hardwire taillight conversion requires a CECM dataset update, which is a separate service available through ACM Technik. Each installation guide tells you which tool is needed, if any.

Product: MK8 European Taillight Harness (Hardwire Conversion)  ·  Link to this answer

The harness is a physical wiring component. It cannot change the vehicle's software configuration by itself. Where coding is needed, MK6IX provides the coding instructions in the installation guide. Advanced programming and dataset updates are separate procedures unless the product description explicitly says they are included.

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No. A harness cannot automatically remove software configuration faults. The headlights can work correctly while an AFS related fault remains, because the fault is about a function the car expects to find, not about the headlight circuit itself. Some conversions therefore require coding to disable the functions that are no longer present (AFS, automatic levelling). The AFS Delete or coding section of the installation guide for your harness covers it.

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The ABS module must support the traction control button input, and the relevant function must be enabled in the module. The button and harness alone cannot guarantee operation if the module is not configured correctly. The installation guide for the traction control button kit provides the coding information.

Product: Traction Control Button Kit with Harness (MK5/MK6)  ·  Link to this answer

Generic OBD scanners typically cannot perform the Volkswagen and Audi coding and adaptation functions these retrofits need. They read and clear fault codes, but the retrofit coding requires a compatible diagnostic or coding tool such as VCDS or OBDeleven. If you do not own one, many VW and Audi specialists can do the coding for you.

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Compatibility depends on the vehicle's equipment, its region (North American or Rest of World), the original and replacement components, and the connector configurations on both, not just the model name. A matching connector shape does not guarantee a matching pin assignment. Each product page lists what the harness fits and what it does not.

If you are unsure, send the model, year, what the car came with and photos of both connectors (the factory plug and the plug on your new part) before you order. Your VIN helps confirm the factory build. We will confirm the right harness.

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Not necessarily. Aftermarket brands such as VLAND, Osram, Alptech and Eurolabs can use different internal circuits and pin assignments from the OEM part, even when the connector looks the same, and sometimes a different connector altogether. VLAND DRL wiring is a common example.

Compatibility has to be checked for the specific assembly you have, not assumed from the brand name. Some MK6IX harnesses are built for specific aftermarket lights and say so by name, for example the VLAND headlight harness and the Alptech and Eurolabs taillight harnesses. For anything else, compare the connector on your lights with the product listing, or send photos before ordering.

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It depends on the original vehicle configuration and the replacement light assemblies. Many MK6IX products are specifically designed to install European lighting on North American vehicles, so a European conversion on a NAR car is often exactly what the harness is for.

What matters is that the harness is built for your car's factory wiring on one side and for the actual lights you are installing on the other. Check the fitment list on the product page, and send your VIN and connector photos if you are unsure.

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Work through it in this order:

1. Check that the correct harness was ordered for your car's region, factory equipment and the lights you installed.

2. Verify connector seating and every wiring connection, including any additional connection the installation guide calls for (for example the fused high beam connection on the MK7 14 pin to 10 pin conversion).

3. Verify that the proper installation guide for that harness was followed, step by step.

4. Confirm that any required coding was completed and accepted by the module.

5. Read the fault codes with a compatible diagnostic tool.

If you still need help, send your order number, vehicle details, the symptoms and a complete diagnostic scan where applicable.

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Custom work may be considered, depending on the application, component availability, technical complexity and current workload. Not every project can be taken on. Send a message with the vehicle (model, year and region, or the VIN), photos of the connectors involved and a description of what you are trying to do.

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Please put everything in your first message so we can answer in one reply: your order number, vehicle model and year, vehicle region (North American or Rest of World), the original equipment on the car, the replacement parts you are installing, photos of the connectors, and a diagnostic scan where applicable. Use the contact form or email John@mk6ix.com.

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