Land Rover Discovery Sport Voltage Quality Control Module GX73-14B526-AC - Used Original Parts

Diagnosis and Common Symptoms

From the workshop floor, a failing Voltage Quality Control Module (VQCM) on the Discovery Sport presents a unique set of electrical gremlins that can be easily misdiagnosed as a faulty battery or alternator. This module is critical for managing the vehicle's complex power demands, especially with the start/stop system. Failure often results in unstable voltage supply to other control units.

Common fault codes logged in the BCM (Body Control Module) or PCM (Powertrain Control Module) include:

• P0562-00: System Voltage Low
• U0424-00: Invalid Data Received From Voltage Quality Control Module
• U3000-49: Control Module - Internal Electronic Failure

On the dashboard, the driver may experience:

• Persistent "Low Battery" or "Charging System Fault" warnings, even with a new battery.
• The Eco Start/Stop system being permanently unavailable.
• Intermittent failure or flickering of infotainment screens, instrument cluster, and interior lighting.
• In severe cases, a complete non-start condition due to improper power distribution.

Introduction

Restore stable electrical performance to your vehicle with this Genuine Land Rover Voltage Quality Control Module. Pulled from a donor Discovery Sport, this unit is not a cheap aftermarket copy; it is the original factory-fitted component designed for seamless integration. Each module has been professionally bench-tested by our technicians to verify correct voltage regulation and CAN bus communication, ensuring it performs precisely as intended. This is a reliable and cost-effective solution to complex electrical faults.

Product Details

• Brand: Land Rover
• Model Compatibility: Land Rover Discovery Sport (L550)
• Part Name: Voltage Quality Control Module (VQCM) / GX73-14B526-AC
• Condition: Genuine Used (Tested Working)
• Notes: This module is responsible for stabilizing the vehicle's electrical system during high-load events and engine start/stop cycles. It acts as a buffer to protect sensitive electronics from voltage fluctuations, working directly with the vehicle's main and auxiliary battery systems.