Vemo V20-71-0003 Horn Relay

VEMO Horn Relay for BMW 3 Series and M3

The Vemo V20-71-0003 is a 12-volt horn relay built for BMW applications that use a 5-pin, 5-pole relay layout. Its light-green housing and compact dimensions help identify the correct electrical relay during service, while the Terminal 30 relay function supports horn circuit switching in the vehicle’s electrical system.

Key Features

• 12 V horn relay for automotive electrical systems
• 5 connectors / 5 poles for the specified relay configuration
• Light-green housing color with green relay body
• Compact size: 39.5 mm height, 30.7 mm width, 26.8 mm length
• VEMO part number V20-71-0003 for catalog matching
• Cross-reference: Gates 20843

Product Details

VEMO V20-71-0003 is an electrical relay for horn circuit control, using a Terminal 30 relay function and a 12-volt rating. The VEMO brand line focuses on OE-style electrical components, and this relay follows the specified 5-pin format used across multiple BMW 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, and M3 applications. This part number, V20-71-0003, is also referenced against several OE and aftermarket numbers for catalog lookup and service replacement.

Vehicle Fitment

• Fits 2001-2006 BMW 325Ci, N/A
• Fits 2001-2006 BMW 325i, N/A
• Fits 2001-2006 BMW 325xi, N/A
• Fits 2001-2006 BMW 330Ci, N/A
• Fits 2001-2006 BMW 330i, N/A
• Fits 2001-2006 BMW 330xi, N/A
• Fits 2001-2006 BMW M3, N/A
• Fits 1999 BMW M3, N/A
• Fits 2000 BMW 323Ci, N/A
• Fits 1999-2000 BMW 323i, N/A
• Fits 2000 BMW 328Ci, N/A
• Fits 1999-2000 BMW 328i, N/A
• Fits 1999 BMW 318ti, N/A
• Fits 1999 BMW 323is, N/A
• Fits 1999 BMW 328is, N/A

Common Uses

• Horn not activating when the steering wheel switch is pressed
• Intermittent horn operation caused by relay contact wear
• Electrical relay failure in the horn circuit
• Incorrect relay identification during BMW electrical diagnosis
• Replacement of a 5-pin 12 V horn relay in BMW 3 Series and M3 models

Installation Notes

Confirm the relay footprint, connector count, and 12-volt specification before installation. Match the relay function and terminal layout to the original unit, and verify the vehicle’s relay panel location against the existing part number V20-71-0003. For BMW 325Ci, 330i, and M3 relay service, compare the housing color and connector arrangement to the removed relay to ensure correct identification.

Quality Assurance

This VEMO relay is cataloged with multiple interchange references, including Gates 20843, supporting parts lookup across OE and aftermarket listings. Use the confirmed fitment data and electrical specifications to verify application before replacement.