This is a genuine factory original equipment manufacturer (OEM) Door Speaker Frequency Crossover Module. Sourced from a premium Volkswagen audio layout, this passive splitter splits audio frequencies coming from the head unit, redirecting crisp highs to the tweeters and balanced lows to the lower door woofers. It is an ideal replacement if your car is suffering from distorted sound, audio dropouts, or complete speaker side failure.

Type	Door Audio Frequency Junction / Crossover Unit
Placement on Vehicle	Front, Left or Right Inside Door Panel Layout
Features	Multi-Pin Terminal Block, Internal Passive Frequency Filters
Primary Part Number	1K0035463D / 1K0 035 463 D
Superseded Part Number	1K0035463 / 1K0-035-463-D
Interchange Part Number	310413710010 / 902275480011 (Philips/VAG Matrix)
Fitment Type	Direct Interior Screw-in Mounting
Number of Pieces	1 In-Door Speaker Crossover Unit
Material	Hardened Anti-Static ABS Housing Matrix
Color / Finish Style	Satin Black Outer Case Casing
Country/Region of Manufacture	Malaysia / Germany

This module integrates directly into factory 10-speaker sound system wiring configurations across the following platform models:

• Primary Vehicle Fitment: Volkswagen Golf Mk5 Hatchback / GTI / R32 / Variant (2004, 2005, 2006, 2007, 2008, 2009)
• Extended Platform Layouts: Volkswagen Jetta Mk5 / Jetta GLI / Sedan & Wagon variants (2005, 2006, 2007, 2008, 2009, 2010)
• Generation Transition Models: Volkswagen Golf Mk6 / SportWagen / Variant Trims (2010, 2011, 2012, 2013, 2014)
• Cross-Brand Structural Twins: Audi models, Skoda Octavia Mk2, and Seat Leon platforms utilizing the premium 3-way/10-speaker internal door wire harness arrays.

• Removal Precaution: Use safe plastic trim tools to lift the main door panel trim cards. Forcing panels with metal screwdrivers will scratch your leather/cloth textures and snap the internal compression retention pins.
• Moisture Ingress Note: When mounting this crossover housing inside the inner steel skin, ensure the protective moisture barrier plastic sheet is properly resealed. Leaking window seals can direct rainwater directly onto the electrical PCB pins.
• Wiring Pin Inspection: Always spray electrical terminal cleaner inside the multi-pin female block harness plug before snapping the locking tab over this replacement unit to eliminate high resistance or corrosion.