Keep charging-system voltage under control with the Standard Ignition Voltage Regulator VR-771, a Mazda 3 voltage regulator made for the 2004-2009 Mazda 3. It is also a direct-fit replacement for the 1997-2003 Mazda Protege, 2002-2003 Mazda Protege5, 2004-2006 Mazda RX-8 and 2006-2007 Mazda 5. See the Buyer's Guide tab for engine details.
A voltage regulator controls the alternator's charging output so the battery and electrical system get a steady voltage, not too little and not too much.
Signs a voltage regulator may need replacing include a battery or charging warning light, dim or flickering lights, and a battery that runs down or seems overcharged. Other charging-system parts can cause the same symptoms, so diagnose the cause first. If the regulator is at fault, the VR-771 replaces it.
Interchange: R2019 · VR977 · VR1079 · Z59918W70
This part cross-references / interchanges with the following part numbers:
Which vehicles does the Standard Ignition VR-771 fit?
It is listed for the 1997-2003 Mazda Protege, 2002-2003 Mazda Protege5, 2004-2009 Mazda 3, 2004-2006 Mazda RX-8 and 2006-2007 Mazda 5. See the Buyer's Guide tab for engine details.
What does a voltage regulator do?
It controls the alternator's charging output so the battery and electrical system receive a steady voltage instead of too little or too much.
What are signs a voltage regulator may be failing?
Common signs include a battery or charging warning light, dim or flickering lights, and a battery that runs down or seems overcharged. Test the charging system first, since other parts can cause these.
Why is the circuit board encapsulated in epoxy?
Standard Ignition encapsulates the PC board in epoxy to improve performance and help resist failures caused by vibration and by corrosion of electrical connections.
What part numbers does the VR-771 interchange with?
It cross-references to R2019, VR977, VR1079 and Z59918W70.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
