Bosch 0392023455 Heater Water Pump

Bosch Engine Auxiliary Water Pump

Bosch Engine Auxiliary Water Pump 0392023455 is a new heater water pump built to match original equipment specifications. It is tested for torque, vacuum leak integrity, and proper component fit to help maintain reliable coolant circulation in the heating and auxiliary cooling circuit.

Compatible with Volkswagen Golf, Jetta, and e-Golf applications, this Bosch auxiliary water pump supports vehicles that need consistent coolant flow for heater performance and thermal management. Part number 0392023455 is also referenced by OE interchange 5Q0965567 for the same application.

Key Features

• New Bosch heater water pump for engine auxiliary cooling systems
• Built to OE specifications for fit and function
• Torque-tested to verify correct impeller-to-shaft engagement
• Vacuum leak-tested to confirm sealing at the housing, seals, tube joint, and cap
• OE component verification helps confirm proper mounting and alignment
• Fits Volkswagen Golf, Jetta, and e-Golf applications with holder

Detailed Description

Bosch 0392023455 is an engine auxiliary water pump designed for vehicles that use a separate heater water pump to move coolant through the heating and cooling system. Bosch verifies fit using original equipment parts and accessories, including related mounting components such as the pulley, brake plate, housing, and tensioners, to help ensure correct assembly alignment. This part is a direct-fit style replacement for 2016-2020 Volkswagen Jetta, 2018-2019 Volkswagen e-Golf, and 2019-2020 Volkswagen Golf applications listed with holder and engine auxiliary water pump notes.

What It Helps Address

• Weak or inconsistent heater output from poor coolant circulation
• Auxiliary coolant flow issues in the heating circuit
• Leaks at the pump housing, seals, tube connection, or cap
• Noise or fit concerns related to impeller and shaft engagement
• Replacement needs for a worn or failed auxiliary water pump

Installation Notes and Tips

Verify the vehicle’s OE part number and fitment notes before installation. This Bosch auxiliary water pump is listed for N/A position applications and should be matched to the exact Volkswagen Golf, Jetta, or e-Golf configuration shown in the fitment data. Confirm the holder and related mounting arrangement during diagnosis and replacement.

Quality Assurance

Bosch tests each water pump for torque and vacuum leak performance to check internal engagement and sealing integrity. The brand’s OE-focused verification process is used to confirm proper fit and component alignment for the listed applications. Part number 0392023455 cross-references OE number 5Q0965567.