Vemo V15-71-0040 Horn Relay

Horn Relay for Audi and Volkswagen Applications

The Vemo V15-71-0040 is a 12V horn relay for air horn circuits in select Audi and Volkswagen vehicles. It is specified at 15A and uses a compact relay body measuring 37 mm high, 23 mm long, and 16 mm wide for OE-style electrical replacement work.

Use this VEMO relay when servicing horn circuit faults on models such as the Audi A3, Audi A6, Audi Q5, Volkswagen Golf, and Volkswagen GTI. The V15-71-0040 part number is also referenced in OE-style replacement searches for relay No. 646 applications.

Key Features

• Brand: Vemo / VEMO
• Part number: V15-71-0040
• Relay function: Air Horn
• Voltage: 12V
• Rated current: 15A
• Compact relay dimensions: 37 mm x 23 mm x 16 mm
• Packaging size: 2.3 cm depth, 3.7 cm height, 1.6 cm width
• Cross-reference application support for select OE-style relay numbers

Product Details

VEMO V15-71-0040 is an electrical relay built for horn circuit control in late-model Audi and Volkswagen platforms. It is listed for a wide range of vehicles from 2005 through 2017, including Audi A4, A5, A6, A8, Q3, Q5, Q7, S4, S5, S6, S7, S8, SQ5, TT Quattro, and Volkswagen CC, e-Golf, Golf, Golf Alltrack, Golf R, Golf SportWagen, GTI, Passat, Tiguan, Touareg, Eos, and Jetta. This part cross-references Four Seasons 20907 and Eastern Catalytic 20399 for the same application.

Search terms commonly used for this part include Audi A3 horn relay replacement, Volkswagen Golf horn relay 12V 15A, and VEMO V15-71-0040 relay for air horn circuits. The relay is also associated with OE-style references such as 13A025C and relay No. 646 in the fitment notes.

What It Helps Address

• Horn inoperative due to relay failure
• Intermittent horn operation caused by worn relay contacts
• Air horn circuit switching problems
• Electrical relay replacement during horn system diagnosis
• OE-number-based relay replacement on Audi and Volkswagen models

Installation Notes and Tips

Verify the relay function, voltage, current rating, connector style, and OE reference before installation. Confirm the vehicle’s relay location and compare the existing unit to V15-71-0040 by part number and terminal layout. For fitment-based searches, this relay is listed for 2011-2017 Audi A6, 2011-2017 Audi Q5, 2011-2017 Volkswagen Golf, and 2011-2017 Volkswagen GTI, along with many other Audi and Volkswagen applications shown in the fitment data.

Quality Assurance

VEMO identifies this part as a cataloged replacement relay with defined electrical specifications and vehicle fitment coverage. The published dimensions, 12V rating, and 15A current rating provide the key reference points for matching the correct horn relay to the application.