Bosch Auxiliary Water Pump & Isolator - 0392024058

The Bosch Auxiliary Water Pump & Isolator (Part No. 0392024058) is an electronically commutated 12V centrifugal coolant pump designed to support and supplement your vehicle's primary cooling system. Whether you're maintaining optimal engine temperatures under demanding conditions or replacing a failed auxiliary pump, this Bosch unit delivers the engineering reliability the brand is known for in OE and performance cooling applications. With SKU BOS0392024058 and an MSRP-competitive price of $183.79 at ThreePiece.us, it's a straightforward upgrade or direct replacement for vehicles equipped with an auxiliary coolant circuit.

Key Features & Benefits

• Electronically Commutated 12V Design: This is an EC (electronically commutated) centrifugal pump, meaning it uses brushless motor technology for efficient, reliable long-term operation — reducing wear compared to traditional brushed motor pumps.
• Auxiliary Cooling Support: Auxiliary water pumps are critical for maintaining coolant flow through heater cores, turbocharger cooling circuits, intercooler loops, and other secondary cooling passages — especially when the primary mechanical pump alone isn't sufficient.
• Includes Isolator: The pump ships with an isolator, which helps dampen vibration and reduces noise transmission to the chassis — an important detail for OE-quality installations.
• Bosch OE Engineering: Bosch is a globally recognized supplier of OE automotive components. This part carries Bosch's MPN 0392024058 and is manufactured to the engineering standards expected of a major OE supplier.
• Made in the U.S.A.: Per retailer sourcing data, this product is manufactured in the United States.
• Regularly Stocked: Unlike special-order or hard-to-find components, this pump is noted as a regularly stocked product, supporting faster fulfillment and reduced wait times.

Specifications

• Brand: Bosch
• Part Number (MPN): 0392024058
• SKU: BOS0392024058
• Pump Type: Electronically commutated (EC) 12V centrifugal coolant pump
• Included: Auxiliary water pump + isolator
• Country of Origin: Made in the U.S.A.
• Condition: New

Fitment

The Bosch 0392024058 is an auxiliary water pump used across a wide range of vehicle platforms that incorporate secondary coolant circuits. Because auxiliary water pumps are used in many different OE applications — including turbocharged engines, hybrid thermal management systems, and intercooler cooling loops — fitment varies by vehicle. We strongly recommend verifying compatibility with your specific year, make, model, and engine before ordering. If you have questions about whether this pump fits your application, our team at ThreePiece.us is available to help confirm fitment. Do not install this part based solely on physical appearance or general part category — cross-reference your vehicle's OE part number or consult a fitment specialist.

What's in the Box

• 1x Bosch Auxiliary Water Pump (0392024058)
• 1x Isolator (vibration dampening mount)

Why Buy from ThreePiece.us

At ThreePiece.us, we make it easy to get the right part with confidence. Every order ships free — no minimum required — so you're not paying extra to get the Bosch auxiliary water pump to your door. Need to spread out the cost? We offer financing through Affirm, letting you buy now and pay over time on your terms. Have fitment questions before you order? Our knowledgeable team is here to help you confirm the right part for your specific vehicle and cooling system setup. Shop with confidence knowing you're getting a new, regularly stocked Bosch component backed by straightforward ordering and customer support.

Frequently Asked Questions

Q: What does an auxiliary water pump do, and why would I need to replace it?
A: An auxiliary water pump circulates coolant through secondary circuits in your vehicle — such as the heater core, turbocharger cooling jacket, or an intercooler loop — independent of (or in addition to) the main mechanical water pump. When an auxiliary pump fails, you may notice reduced heater output, turbocharger overheating after shutdown, or elevated coolant temperatures in specific circuits. Replacing the failed pump with a new Bosch unit like the 0392024058 restores proper coolant flow to those systems.

Q: What is the isolator included with this pump, and is it required for installation?
A: The isolator is a vibration-dampening mount that cushions the pump during operation, reducing noise and preventing vibration from transferring into the vehicle's chassis or surrounding components. Using the included isolator during installation is recommended for a proper, OE-quality fit and quieter long-term operation.

Q: How do I confirm this Bosch pump (0392024058) fits my vehicle?
A: The most reliable method is to cross-reference your vehicle's OE auxiliary water pump part number with Bosch MPN 0392024058. You can find your OE part number in your vehicle's factory service manual or by checking with a dealer. If you're unsure, contact us at ThreePiece.us before ordering — we're happy to help verify fitment for your specific application.

Q: Is this pump new, and is it regularly available?
A: Yes — the Bosch 0392024058 is sold new and is noted as a regularly stocked product, meaning it's not a special-order or limited-availability item. This supports faster order processing and reduces the risk of extended backorder delays.