Bosch 0392020039 Auxiliary Electric Water Pump

The Bosch 0392020039 is an OEM auxiliary electric water pump designed to ensure optimal coolant circulation in your vehicle's climate control system. This genuine Bosch replacement pump is engineered to meet exact original equipment specifications and replaces failed or leaking auxiliary water pumps that prevent the heater from blowing warm air.

Key Features:

• 100% new OEM-quality electric auxiliary water pump
• Pressurizes coolant to ensure proper circulation through the heater core
• Manufactured in Germany with premium-grade materials for durability
• Tested to ensure proper functionality and impeller-shaft mating
• Direct replacement for OEM part numbers 078965561, 034965561C, and related cross-references
• Electric operation provides efficient coolant flow in all driving conditions

This auxiliary water pump plays a critical role in your vehicle's heating system by circulating coolant into the heater core, allowing the climate control system to deliver warm air to the cabin. The pump typically runs during engine operation and may continue for a few minutes after shutdown to eliminate hot spots in the cooling system. Bosch's rigorous testing procedures include torque testing to detect loose impeller-shaft press fits, ensuring reliable long-term performance.