Mercedes Computer Control Relay K40 Module A2105400072 OEM Genuine

The Mercedes K40 Computer Control Relay Module A2105400072 is an essential electrical component responsible for supplying power to multiple vehicle systems, including the engine control unit (ECU), fuel system and other critical electronics. A faulty K40 relay can lead to intermittent electrical faults, starting issues and engine performance problems.

This OEM Genuine replacement module is manufactured to Mercedes-Benz specifications, providing reliable operation, direct fitment and long-lasting durability. It is designed to restore correct electrical power distribution and ensure dependable vehicle performance.

Key Features

• OEM Genuine Mercedes-Benz K40 relay module.
• Part Number: A2105400072.
• Direct replacement for the original control relay.
• Provides stable electrical power distribution.
• Supports ECU and engine management operation.
• High-quality OEM construction.
• Designed for reliable long-term performance.
• Factory-style connectors for straightforward installation.

Benefits

• Restores reliable engine starting.
• Helps eliminate intermittent electrical faults.
• Maintains stable ECU power supply.
• Supports proper fuel system operation.
• Improves overall electrical system reliability.
• OEM quality fit, function and durability.

Vehicle Compatibility

• Suitable for selected Mercedes-Benz models equipped with K40 relay module A2105400072.
• Commonly fitted to various Mercedes-Benz passenger vehicles.

Please verify compatibility using your VIN or existing part number before purchasing, as fitment may vary depending on model, production year and vehicle specification.

Common Symptoms of a Faulty K40 Relay

• Engine cranks but fails to start.
• Intermittent engine stalling.
• Random electrical faults.
• Fuel pump not operating correctly.
• ECU communication faults.
• Dashboard warning lights.
• Intermittent power loss to engine management systems.

Installation Information

• Professional installation is recommended.
• Disconnect the vehicle battery before replacing electrical components.
• Inspect wiring and connectors for corrosion or damage.
• Clear any stored diagnostic fault codes after installation if required.
• Confirm part number compatibility before ordering.

Why Choose an OEM Genuine K40 Relay Module?

OEM Genuine Mercedes-Benz electrical components are manufactured to strict factory standards, ensuring dependable operation, precise fitment and long-term reliability. Replacing a faulty K40 relay module helps restore stable power distribution, reliable engine management and the dependable performance expected from your Mercedes-Benz.