Vemo V10-77-1077 Charging System Voltage Regulator

Charging System Voltage Regulator for Audi

VEMO V10-77-1077 is a charging system voltage regulator for select 2012 Audi models. It is listed for OE reference 07K903803 and is used in the alternator/generator charging system to help maintain stable electrical output.

Key Features

• Charging system voltage regulator for alternator/generator applications
• OE reference: 07K903803
• Fits select 2012 Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 applications
• VEMO V10-77-1077 part number for catalog matching and service lookup
• Aftermarket replacement for charging system repair

Product Details

VEMO V10-77-1077 is a charging system voltage regulator used to control alternator output in vehicles equipped with the referenced OE number. For 2012 Audi A4 and 2012 Audi A4 Quattro, it supports charging system service where the original regulator is identified by OE no. 07K903803. The same application listing also covers 2012 Audi A5, 2012 Audi A5 Quattro, and 2012 Audi Q5. If you are searching for a VEMO V10-77-1077 voltage regulator or an OE 07K903803 replacement for Audi charging system repair, this part number is the catalog match to verify.

This part cross-references OE number 07K903803 for the same application.

What It Helps Address

• Unstable alternator charging voltage
• Battery warning light related to charging control
• Overcharging or undercharging conditions
• Electrical system performance issues tied to regulator failure
• Charging system faults on select 2012 Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models

Installation Notes and Tips

Confirm the OE number on the original unit before ordering. Verify the vehicle year, model, and charging system configuration against the fitment listing for 2012 Audi A4, A4 Quattro, A5, A5 Quattro, and Q5. Inspect the alternator and related charging components during service to help isolate the root cause of the fault. Use proper electrical diagnostic procedures before replacing the regulator.

Quality Assurance

VEMO is listed here as an aftermarket replacement brand for the referenced OE application. Part number V10-77-1077 is cataloged for direct fitment verification against OE no. 07K903803.