T4,G3 Glow Plug Relay

This replacement glow plug relay is designed to control the pre-heating system on a wide range of Volkswagen TDI engines, including VW Transporter T4 2.5 TDI models and other vehicles equipped with the specified engine codes.

Fitted in the main relay panel (location 4/103 depending on model), this relay manages the glow plugs’ operation, ensuring reliable cold starts and correct post-start heating cycles. Over time, the original relay can fail internally, leading to difficult starting, poor cold running, or glow plug fault codes.

Fitment Details:
✅ VW Transporter T4: 2.5 TDI engines (ACV, AJT, AHY, AUF, AYY, AYC, AXG)
✅ VW Transporter T5: 2003–2006, 1.9–2.5 TDI engines
✅ VW Golf Mk3 & Mk3 Cabriolet: TDI models
✅ VW Golf Mk4 / Bora: TDI models (relay location 4/103)
✅ VW Vento: TDI models
✅ VW Polo Mk3 6N: TDI models

Specifications:

• Relay marking: Relay 4/103 (also referenced as 12/103 on T4)

• Direct-fit replacement for the original relay

• Suitable for 12V glow plug systems

Features:

• OE-style performance and fitment

• Restores proper glow plug control for reliable starting

• High-quality internal components for long service life

Fitting Notes:

• Position: Main relay panel (refer to your vehicle’s relay diagram for exact location)

• Always check wiring and glow plugs when replacing the relay

• Clear any fault codes after installation

Applications:

• VW Transporter T4: 2.5 TDI (ACV, AJT, AHY, AUF, AYY, AYC, AXG)

• VW Transporter T5: 2003–2006 (1.9–2.5 TDI)

• VW Golf Mk3 & Mk3 Cabriolet: TDI

• VW Golf Mk4 / Bora: TDI

• VW Polo Mk3 6N: TDI

• VW Vento: TDI

Quantity: Sold each
Quality: Good quality reproduction