BMW 5 Series E60 E61 E63 E64 Hydro Power Steering Rack Gear 6774353

Description

BMW 5 Series E60 E61 E63 E64 Hydro Power Steering Rack Gear is an original steering system component designed for 5 Series and related 6 Series models. Thanks to BMW’s factory design and the use of hydraulic power assistance, it ensures precise handling, stable tracking, and proper transfer of steering input to the wheels.

Specifications and technical data

• SKU: rhd-6774353-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6774353
• Substitutable numbers: 32106777537, 6777537, 6777477, 32106768061, 6768061, 32106766656, 6766656, 32106780945, 6780945, 32106762449, 6762449, 32106769302, 6769302, 32106768064, 6768064, 32106766665, 6766665, 32106775426, 6775426, 32106773772, 6774353, ŁS
• Category: Gearboxes, Racks & Pinions

Purpose and function in the steering system

The hydraulic steering rack is responsible for converting the rotational movement of the steering wheel into the linear movement of the tie rods, while utilizing power steering fluid pressure. In BMW 5 Series E60/E61 and 6 Series E63/E64 models, it is a key component affecting:

• vehicle response to steering inputs,
• stability at higher speeds,
• maneuvering comfort in urban environments,
• damping of vibrations transmitted from the suspension.

A properly selected steering rack allows you to maintain the factory driving characteristics of your BMW, which is particularly important in vehicles with distinctly dynamic handling.

Original origin and compatibility

The offered steering rack comes from the BMW OE line, which means it maintains factory manufacturing standards, geometry, and operating parameters. Using an original component to replace a worn or damaged rack allows you to:

• maintain compatibility with the factory suspension and steering system design,
• preserve the correct operating angles of the tie rods and ends,
• avoid issues with fitting mounts and hydraulic lines.

As a result, installation is predictable, and the steering system can be easily adjusted during a wheel alignment after replacement.

Component condition and installation aspects

The steering rack is in used condition, which in practice means it has been removed from a vehicle and is intended for further use after proper installation and bleeding of the hydraulic system. During replacement, it is recommended to:

• inspect the condition of high and low-pressure lines,
• replace the power steering fluid with fresh fluid that meets BMW specifications,
• check the condition of the tie rods and steering ends,
• perform a wheel alignment after completing the work.

This approach allows you to fully utilize the potential of the steering rack and reduce the risk of subsequent leaks or improper system operation.

Benefits of using the BMW hydraulic steering rack

Using an original hydraulic steering rack in a BMW 5 and 6 Series translates into a number of practical operational benefits:

• Consistent, predictable handling – power steering characteristics matched to the weight and suspension geometry of the specific model.
• Better road feel – the hydraulic system provides natural, linear force transmission to the wheels.
• Stability during dynamic driving – proper transfer of lateral loads to suspension components.
• Ability to maintain original settings for safety systems that interact with the steering system.

For users who value the characteristic BMW handling, replacing a worn steering rack with an original component is a sensible service solution.

Expanding your BMW steering system service

If you are planning a comprehensive repair or upgrade of the steering system area in your BMW and need other elements from the same group, such as steering rack housings, additional mounts, or related components, check out the available parts in the BMW Steering Racks and Housings category.

To better plan service work on your car and understand the relationships between the steering system, suspension, and engine operating temperature, it is worth reading the guide: Engine cooling system – overheating, repair, and used radiators, which discusses the impact of proper engine temperature on component durability.