0445010321 Bosch CP1 High-Pressure Fuel Pump 3-Plunger Precision Design

Product Description

We offer 0445010321 as a CP1 high-pressure common-rail pump for the Audi/VW 3.0 TDI ASB/BKN application stated in our current product material. Because this number is used in a precision diesel injection system, we do not recommend selecting it from a generic “3.0 TDI” search alone. Our sales and technical team first compares the complete pump number with the engine and vehicle information supplied by the buyer.

The common-rail principle separates pressure generation from injector metering. The high-pressure pump feeds the rail, which acts as a hydraulic accumulator before fuel is delivered to the injectors. This system architecture is consistent with Bosch's technical description of common-rail diesel systems. 

Product Snapshot

Application & Compatibility

We use the following application scope as the working reference for this SKU: Audi / VW 3.0 TDI ASB/BKN application stated in the supplied product description. This does not mean every vehicle within a broad model family is automatically compatible. Before we confirm an order, we compare the complete pump number with the engine/application details supplied by the buyer.

Application focus: 3.0 TDI identification

The supplied description associates 0445010321 with Audi and VW 3.0 TDI ASB/BKN vehicles. We retain that application wording for this product page, but we also recommend label-level verification because engine family names can cover multiple configurations. For a B2B order, we want the buyer's old pump number and engine code before confirming interchangeability.

How we distinguish a correct pump from a similar pump

External appearance is not enough. We compare the part number, pump family, mounting geometry, shaft/interface, hydraulic ports and metering-control arrangement where applicable. If any of these points differs, we stop the order confirmation and request additional identification information rather than assuming that a visually similar pump will work.

Hydraulic quality and inspection

Our supplied product information specifies hydraulic bench testing for leakage, pressure stability and fuel delivery before shipment. This is important because a common-rail pump must generate and regulate high pressure consistently; Bosch likewise describes the high-pressure pump as the component responsible for delivering fuel into the rail under high pressure. 

Installation advice for workshops

We recommend checking fuel cleanliness and the condition of the fuel filter before fitting the replacement. The low-pressure supply should be adequate, connections should be clean and leak-free, and the system should be primed according to the engine manufacturer's service procedure. After installation, verify rail-pressure behavior and fault codes before returning the vehicle to service.

Why we ask for the old pump photo

A clear label photo often saves time in B2B purchasing. It allows us to compare the exact number and visible configuration rather than relying on a broad vehicle description. This is especially useful when buyers source several related CP1 pumps at the same time.

What We Check Before Shipment

• Exact part-number and label identification against the purchase order.
• Product condition: new or remanufactured, as quoted.
• Visual condition and obvious sealing/interface issues.
• Hydraulic inspection or bench testing where included in the supplied product/QC process.
• Packaging and labeling suitable for international B2B shipment.

For products sold as new or remanufactured, we follow our internal identification, visual inspection, sealing and hydraulic testing workflow. Where a bench-test record is required, we can provide the applicable inspection information for the supplied unit. We do not use a test claim as a substitute for checking the exact pump number and application.

Ordering Information

For a quotation, please send the exact pump number, quantity, engine code, vehicle/application, OE or cross-reference number if available, required condition (new or remanufactured), destination country and a clear photo of the existing pump label when possible. This information helps us reduce wrong-part shipments.

FAQ

Q: Can I order 0445010321 using only “3.0 TDI”?

A: We recommend against it. Send the full pump number and engine/application details so we can check the configuration.

Q: Does a 1400-bar rating mean the engine always operates at 1400 bar?

A: No. The stated figure is a product-data maximum/upper pressure figure. Actual rail pressure varies with system design and engine operating conditions.

Q: Do you offer new and remanufactured units?

A: Yes, where available. We confirm the actual condition and applicable warranty before quotation.

Q: What is the most useful identification evidence?

A: The pump label, complete part number, engine code and any OE/cross-reference number are the most useful starting points.

Our Company & Technical Responsibility

We are Guangzhou Zhuohang Auto Parts Co., Ltd., a professional supplier of diesel common-rail fuel-system components. We work with overseas repair shops, vehicle maintenance businesses, machinery service companies and distributors. Our role is not only to supply a part number; we help buyers verify the pump identity, application, condition and replacement requirements before shipment.

Our technical-sales responsibility is to help buyers identify the correct product, explain the relevant common-rail system considerations and communicate the condition and inspection scope of the unit supplied. We do not describe an aftermarket or remanufactured part as a genuine Bosch product unless genuine status has been verified.

Warranty & After-Sales

We provide a 12-month warranty for applicable products under our stated warranty terms. For a warranty claim, we normally need the order reference, part number, installation information, fault description and supporting diagnostic evidence. Our team can help distinguish a pump-related issue from problems elsewhere in the fuel system.

Technical Review

Reviewed by: Product Application & Quality-Control Team
Review scope: part-number identification, application wording, technical description and purchasing guidance
Review date: September 2026

Important Brand & Compatibility Disclaimer

Bosch is a trademark of Robert Bosch GmbH. Unless expressly stated and verified, we do not represent the supplied unit as a genuine Bosch product. Vehicle, engine and OE names are used only to describe compatibility or reference applications. Final fitment must be confirmed using the complete pump number, engine code and relevant OE/reference data.