OEM+ 1.8T 40 Pin Complete Engine Harness Narrowband/Wideband ECU's | VW Audi Seat Skoda MK4

Say goodbye to wiring issues in your aging car! If your vehicle is over 20 years old, frayed wires and poor performance are common issues. Unfortunately, Volkswagen no longer produces OEM wiring harnesses for the MK4s and Audi TTs, leaving you with limited options: rely on your faulty harness, attempt repairs yourself, or gamble on another used unit prone to the same deterioration.

We offer a superior solution: a brand-new OEM+ replacement wiring harness that is not only more reliable but also more aesthetically pleasing. With braided shielding for a sleek, modern look and individually labeled wires for easy installation, this harness is designed for both DIY enthusiasts and professionals.

Key Features:

• OEM+ Design: Matches the original routing for seamless integration.
• Complete Kit: Includes all connectors with no components removed compared to the OEM unit.
• Durability: Constructed with TXL automotive-grade, high-temp wiring, rated above the original equipment.
• Versatility: Perfect for daily drivers and race applications.

Connector Abbreviations Overview:

• 40 Pin ECU Connector: Direct connection to the engine control unit.
• Ignition Coils (1-4)
• Fuel Injectors (INJ1–INJ4)
• VSS (Vehicle Speed Sensor)
• N75 (Boost Control Solenoid): Needs to be resistored if removed.
• IAT (Intake Air Temp Sensor)
  Note: Must be the round variant of the sensor. You can purchase it HERE.
  
• TB (Throttle Body)
• OIL (Oil Pressure Switch)
• CRANK (Crankshaft Position Sensor)
• MAP (Boost Pressure Sensor)
• ECT (Coolant Temp Sensor)
• Knock Sensors (KS1, KS2) -
  Note: Must be 2 Pin Sensors. You can order 2 pin sensors compatible HERE.
  
• Camshaft Sensor (CAM)
• N249 (Wastegate Solenoid)

Compatible with the following vehicles:

• 1999 - 2005 - Volkswagen GTI, Jetta, Golf 1.8T - AWD, AWW, AWP (150HP, and 180HP)
  
• 1999 - 2005 - Audi TT 1.8T - AJQ, APE, APP, APX, ARX, ARY, AUM, AUQ, AXX, BAM, BHE, BPY, BUB, BWA, CBB (180HP Variant Only) 
  
  ***Does not fit vehicles with automatic transmissions. Designed for manual 5 or 6 speed transmissions.

Restore your vehicle’s performance with confidence. Whether for daily use or high-performance racing, this OEM+ solution is the ideal replacement for aging MK4 and Audi TT wiring systems.

Overview Video:

1.8T ME7.5 Wideband Pinout Overview: