GMB 180-4050 Engine Water Pump

Engine Water Pump Overview

This GMB engine water pump, part number 180-4050, is built for modern Audi and Porsche applications that use a serpentine belt drive. It is manufactured to meet or exceed OEM specifications and uses an aluminum casting with a plastic impeller for controlled coolant circulation.

Compatible With Audi A6 Quattro, Audi A6 allroad, Audi A7 Sportback, Audi A8 Quattro, Audi Q7, Audi Q8, Audi RS5, Audi RS5 Sportback, Audi RS6 Avant, Audi RS7 Sportback, Audi S4, Audi S5, Audi S5 Sportback, Audi S6, Audi S7 Sportback, Audi S8, Audi SQ5, Audi SQ5 Sportback, Audi SQ7, Audi SQ8, Audi RS Q8, Porsche Cayenne, Porsche Macan, and Porsche Panamera applications listed below. Part number 180-4050 is also cross-referenced to OE and aftermarket numbers for the same application.

Key Features

• Aluminum casting for durable pump housing construction.
• Plastic impeller for efficient coolant movement.
• Standard impeller rotation.
• Serpentine belt drive and pulley type.
• Hub height measures 3.07 for application-specific fitment.

Detailed Description

GMB 180-4050 is an engine water pump engineered for vehicles that rely on a serpentine belt-driven cooling system. The design combines an aluminum body with a plastic impeller to support consistent coolant flow, while the standard rotation layout matches the listed OE-style applications. This part number 180-4050 is a direct replacement option for a wide range of Audi and Porsche models, including the Audi A6 Quattro and Porsche Cayenne, where correct cooling system operation is critical.

The pump is intended for fitments that require the specified hub height and pulley configuration. If you are replacing a worn water pump on an Audi Q7, Audi S5, or Porsche Macan, confirm the vehicle’s cooling system layout against the fitment table before installation.

What It Is Used For

• Coolant leakage from a worn pump housing or seal area.
• Overheating caused by reduced coolant circulation.
• Noise or bearing wear from a failing water pump assembly.
• Cooling system service on serpentine belt-driven engines.
• Replacement of an OE-style pump on listed Audi and Porsche models.

Installation Notes and Tips

Verify the vehicle’s engine and cooling system configuration before ordering. Match the serpentine belt drive type, pulley style, and hub height to the original part. Inspect the cooling system for contamination or related wear before installing the new pump, and follow the manufacturer’s service procedure for coolant refill and bleeding.

Quality Assurance

GMB states that this water pump is manufactured to meet or exceed OEM specifications. Part number 180-4050 cross-references OE and aftermarket numbers including 06M121013C and 06M121013D for the same application.