Standard Ignition Voltage Regulator VR-425
Standard Ignition Voltage Regulator VR-425

Standard Ignition Voltage Regulator P/N:VR-425

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$122.99
MPN: VR-425
Item Package Quantity: 1
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Standard Ignition Voltage Regulator P/N:VR-425
Standard Ignition Voltage Regulator P/N:VR-425
$122.99

Keep your charging system in check with the Standard Ignition Voltage Regulator VR-425, a direct-fit replacement for the 1981-1987 Jaguar XJ6, 1981-1992 Jaguar XJS, and 1987-1992 Land Rover Range Rover — see the Buyer's Guide tab for engine details. A voltage regulator manages the alternator's output so the charging system stays within the proper range; if the original regulator is the cause of overcharging, undercharging, or a flickering charge/battery light, this unit replaces it.

  • Epoxy-encapsulated PC board: the electronic voltage regulator board is sealed in epoxy for improved performance and added resistance to failure caused by vibration and corrosion of electrical connections.
  • Precise, reliable operation: premium components and Standard's own manufactured circuit board are built for accurate operation, reliability, and extra durability toward a longer service life.
  • Quality-controlled build: produced by a global manufacturer of original-equipment ignition products with quality control maintained from componentry through finished product.
  • Durable materials: high-grade materials chosen for these starting and charging system parts support extended service life.

Interchange: R977 · VR813 · VR638 · AEU2750 · JLM277 · UCB133

This part cross-references / interchanges with the following part numbers:

R977, VR813, VR638, AEU2750, JLM277, UCB133, VR-425

Frequently Asked Questions

What does this voltage regulator do?

It manages the alternator's output voltage so your charging system stays within the proper range, protecting the battery and electrical components from overcharging or undercharging.

Which vehicles does the VR-425 fit?

It's a direct-fit replacement for the 1981-1987 Jaguar XJ6, 1981-1992 Jaguar XJS, and 1987-1992 Land Rover Range Rover. Check the Buyer's Guide tab to confirm your vehicle.

What numbers does this part interchange with?

It replaces R977, VR813, VR638, AEU2750, JLM277, and UCB133. Match your original number to confirm the correct replacement.

How is the circuit board protected?

The electronic voltage regulator PC board is encapsulated in epoxy, adding resistance to failure that may be caused by vibration and corrosion of electrical connections.

What are signs the voltage regulator may need replacing?

Overcharging, undercharging, dimming or flickering lights, or a charge/battery warning light can be signs. Diagnose the charging system first, since these symptoms can have other causes.

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