0445010173 Bosch CP1H Common Rail High-Pressure Fuel Pump

The 0445010173 is a Bosch-numbered high-pressure common rail fuel pump. It is designed for use in common rail diesel fuel systems where the pump must generate and supply high-pressure fuel to the common rail system.

For replacement applications, the pump should be matched by the complete pump number, pump type code, engine code and OE reference rather than by vehicle model or engine displacement alone.

Product Overview

The 0445010173 high-pressure pump is part of the Bosch CP1H common rail pump family. Available catalog data identifies the pump as a radial-piston high-pressure pump with the type code:

The number 0445010173 should be used as the primary identification reference when checking replacement compatibility.

Key Product Information

0445010173 Application and Compatibility

The 0445010173 reference appears in diesel-pump application catalogs associated with Fiat, Vauxhall and Opel applications. Other specialist diesel-pump listings also associate this pump reference with selected Saab 9-3 1.9 TTiD and related 1.9-litre diesel applications.

Because common rail pumps can vary by engine code, pump configuration, OE reference and calibration specification, vehicle-model matching alone is not sufficient.

Before ordering, please provide one of the following:

• Existing pump part number
• Complete pump identification label
• Engine code
• Vehicle make, model and production year
• OE reference number
• Clear photographs of the existing pump

Our application team can then check the available identification information before shipment.

Important: Do not order this pump solely because the vehicle has the same engine displacement or a similar vehicle model. Final compatibility should be confirmed from the complete pump identification and OE/application data.

Technical Specification

The type-code information above is based on publicly available diesel-pump catalog references. Final technical specifications for a supplied unit should be confirmed from the actual pump identification and supplier test records.

Why Correct Pump Matching Matters

A common rail high-pressure pump is a critical component of the diesel fuel system. An incorrect pump specification can result in poor pressure control, starting difficulties, unstable engine operation or fuel-system fault codes.

For this reason, replacement should not be based only on appearance.

Before installation, professional technicians should verify:

1. Pump part number
2. Pump type code
3. Engine code
4. OE reference
5. Mechanical mounting
6. Fuel inlet and outlet configuration
7. Electrical or metering-valve configuration
8. Required system calibration
9. Condition of the fuel system
10. Test results after installation

If the original pump failed because of contaminated fuel, metal particles or inadequate filtration, the complete fuel system should also be inspected before installing a replacement pump.

New and Remanufactured Options

Depending on stock availability, the 0445010173 may be supplied as a new aftermarket replacement or as a professionally remanufactured unit.

The product condition should always be confirmed before purchase.

New Replacement Pump

Remanufactured Pump

Where a remanufactured pump is supplied, customers should confirm:

• Component inspection procedure
• Replaced wear components
• Calibration procedure
• Hydraulic test procedure
• Final test result
• Warranty terms

We do not describe a replacement pump as a genuine Bosch product unless its genuine Bosch status can be verified from the product and purchasing documentation.

Quality Control and Testing

Our recommended inspection procedure includes:

1. Part Identification

The pump number and available identification markings are checked against the order information.

2. Visual Inspection

The housing, mounting surfaces, shaft area, fuel ports and external components are inspected for visible damage or abnormal wear.

3. Sealing Inspection

The pump is checked for abnormal fuel leakage or sealing problems during the applicable test procedure.

4. Hydraulic Bench Testing

Where applicable, the pump is tested on a suitable diesel common rail test bench to evaluate its operating condition and fuel-delivery performance.

5. Final Quality Check

The final inspection confirms that the tested unit corresponds to the ordered part number and agreed product condition before shipment.

Actual test records should be used when a customer requires documented performance data.

Technical Responsibility

Technical Responsibility: Product application and quality-control team
Company: Guangzhou Zhuohang Auto Parts Co., Ltd.

For application-critical orders, customers are encouraged to provide the original pump identification label or OE reference for additional verification.

Product Evidence

Actual product photos

Product Identification Guide

When comparing an existing pump with 0445010173, check the following identification points:

Part Number

Type Code

Physical Configuration

Compare:

• Housing shape
• Mounting points
• Drive interface
• Fuel connections
• Metering/control components
• Identification markings

Common Symptoms of a High-Pressure Pump Problem

A faulty high-pressure pump can contribute to symptoms such as:

• Difficult starting
• Low or unstable rail pressure
• Engine hesitation
• Reduced power
• Engine stalling
• Rail-pressure-related diagnostic trouble codes
• Difficulty maintaining required fuel pressure under load

However, these symptoms are not proof that the high-pressure pump itself has failed.

Other possible causes include:

• Restricted fuel filter
• Air entering the low-pressure fuel circuit
• Fuel contamination
• Faulty injectors
• Faulty metering valve
• Rail-pressure sensor problems
• Wiring or ECU-related faults
• Excessive injector return flow

A proper fuel-system diagnosis should therefore be completed before replacing the pump.

Installation and Commissioning

Installation should be performed by a qualified diesel-fuel-system technician.

Before installation:

1. Clean the surrounding fuel-system components.
2. Check the fuel filter and replace it if required.
3. Inspect the fuel for contamination or water.
4. Check the fuel lines for air ingress or restrictions.
5. Confirm that the replacement pump has the correct part number.
6. Compare the replacement pump with the original unit.
7. Follow the applicable engine manufacturer's installation and priming procedure.

After installation:

1. Prime the fuel system correctly.
2. Check for fuel leaks.
3. Start the engine according to the applicable service procedure.
4. Monitor rail pressure and relevant diagnostic parameters.
5. Confirm stable engine operation.
6. Recheck for leaks after the system reaches operating temperature.

FAQ

Is 0445010173 a genuine Bosch pump?

The number 0445010173 is identified in Bosch pump catalog references. However, the product sold on this page should not be described as a genuine Bosch unit unless the actual product and purchasing documentation verify genuine Bosch origin.

Does 0445010173 fit every 1.9-litre diesel engine?

No. Engine displacement alone is not sufficient to confirm compatibility. The complete pump number, type code, engine code and OE/application information should be checked before ordering.

Is 0445010173 compatible with Saab, Opel, Vauxhall or Fiat applications?

Available specialist diesel-pump references associate 0445010173 with selected Saab, Opel/Vauxhall and Fiat diesel applications. Exact compatibility depends on the engine code and OE reference, so the existing pump identification should be checked before purchase.

Can I install a remanufactured 0445010173 pump directly?

A remanufactured pump must still be checked for correct part-number and application compatibility. Installation and fuel-system priming should be performed according to the applicable service procedure.

What information should I send before ordering?

Please provide the existing pump part number and, preferably, a clear photograph of the pump identification label. Engine code and OE number are also useful for application verification.

What should I check if rail pressure remains low after pump replacement?

Check the fuel filter, low-pressure fuel supply, air ingress, injector return flow, metering valve, rail-pressure sensor, wiring and fuel contamination before assuming that the replacement pump is defective.

Warranty and After-Sales Support

Warranty Conditions

Warranty period: 12 months from shipment / delivery
Coverage: manufacturing defects / agreed product condition
Exclusions: contamination, incorrect installation, unauthorized modification, etc.

Warranty claims normally include:

• Order information
• Product part number
• Installation information
• Diagnostic fault codes
• Relevant test results
• Clear photographs or videos where appropriate

For fuel-system components, proper installation and system diagnosis are important for warranty evaluation.

Ordering Information

For an accurate quotation and compatibility check, please send:

Part Number: 0445010173
Quantity: [Required quantity]
Product Condition: New / Remanufactured
Engine Code: [If available]
OE Number: [If available]
Application: [Vehicle / Equipment]
Destination: [Country / Port]

Technical Review

Technical Review: Diesel Fuel System Engineering Team
Review Date: September 8, 2026

This page is intended to provide product identification and purchasing guidance. Application information should be confirmed against the actual pump, engine code and OE reference before installation.

About Guangzhou Zhuohang Auto Parts Co., Ltd.

Guangzhou Zhuohang Auto Parts Co., Ltd. supplies diesel fuel-system components for international automotive and machinery markets, including common rail fuel pumps, fuel injectors and related diesel fuel-system components.

For application-sensitive products such as high-pressure common rail pumps, customers are encouraged to provide the original part number and product identification information so that compatibility can be checked before shipment.

Important Product Disclaimer

Brand names and vehicle or engine names mentioned on this page are used only to identify compatibility, application or reference information where applicable.

Do not assume compatibility solely from vehicle model, engine displacement or appearance. Always verify the complete part number, type code, engine code and applicable OE information before ordering or installation.

The product condition—new, aftermarket replacement or remanufactured—must be confirmed before purchase.