Renault Trafic II Opel Vivaro A DCI Power Steering Pump Unit 491105879R

Renault Trafic II Opel Vivaro A DCI Power Steering Pump Unit is an original component from the Power steering pumps category, designed for the steering system of commercial vehicles. This used OEM part ensures factory geometry, correct operating pressure, and stable performance of the hydraulic power steering, which translates into confident handling and predictable steering system response.

Specifications and technical data

• SKU: 491105879R
• Mark: Renault
• Condition: Used
• OEM Part Number: 491105879R
• Substitutable numbers: 491105879R, 49110 5879R
• Category: Power Steering Pumps

Purpose and role in the steering system

The described pump is a component of the hydraulic power steering system in Renault Trafic II and Opel Vivaro A models with DCI engines. Its task is to generate the appropriate pressure in the fluid circuit so that the force required to turn the wheels is significantly reduced, and vehicle maneuvering – especially in city traffic and during parking – remains smooth and predictable.

By maintaining factory design parameters, the pump works in harmony with the original steering gear, hoses, and fluid reservoir, reducing the risk of noise, vibrations, or uneven system operation.

Benefits of using an original power steering pump

Using an original pump from the Power steering pumps category in a Renault Trafic II or Opel Vivaro A allows for maintaining the integrity of the entire steering system. In practice, this means:

• maintaining the correct force ratio on the steering wheel at both low and high engine speeds,
• stable system pressure, which reduces the risk of the steering wheel "stiffening" during maneuvers,
• proper compatibility with existing hoses and the fluid cooler,
• reduced risk of leaks resulting from component mismatch.

A used OEM part is a cost-effective solution that is also technically matched to the specific vehicle configuration, which is particularly important in intensively used commercial vehicles.

Selection by part numbers and vehicle integration

The pump has been designed as a component dedicated to specific versions of the Renault Trafic II and Opel Vivaro A, which facilitates selection by OEM number or interchangeable part numbers. This allows for precise verification of compatibility with a specific vehicle, minimizing the risk of installation problems or the need for hydraulic system modifications.

For users and workshops, this means:

• easier identification of parts based on service documentation,
• the ability to quickly verify compatibility with the power steering system,
• consistency with factory installation and system bleeding procedures.

Condition, installation, and operation

The pump is offered as a used component, which allows for lower repair costs while maintaining the manufacturer's original specifications. Before installation, standard service procedures are recommended: checking the cleanliness of the hoses, replacing the fluid with fresh fluid, and thoroughly bleeding the system to ensure smooth operation and reduce the risk of cavitation.

A correctly selected and installed power steering pump improves driving comfort, maneuvering safety, and the durability of other steering system components, such as the steering gear or tie rods.

Technical support and additional materials

To better understand the relationships between pumps, injectors, and other engine supply components, and to learn proper diagnostics using OEM numbers, it is worth consulting our guide: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. Although it primarily concerns the fuel system, it also discusses practical principles of part selection by number and workshop operation.

If you are planning a comprehensive repair or upgrade of the steering system area in your Renault and need other elements from the same group, such as hydraulic hoses, a steering gear, or a power steering fluid reservoir, check out the available parts in the Renault Power steering pumps category.