Cardone 3R-503 Power Steering Reservoir

Cardone Power Steering Reservoir 3R-503

Restore proper power steering fluid storage and flow with the Cardone Power Steering Reservoir 3R-503. This remote-mounted reservoir is built to OE design standards and includes a reservoir cap for a direct replacement on select BMW applications, including BMW M5, M6, and 3 Series models with Active Steering.

Key Features

• 100% tested for leak-free performance
• OE fit, function, and performance match
• Made from OE-grade plastic for strength and durability
• Resists cracking from engine compartment heat
• Integrated-filter designs maintain OE-level filtration efficiency
• Cap included; black finish
• Remote-mounted reservoir design

Product Details

The Cardone 3R-503 power steering reservoir is a new replacement component designed for vehicles that use a remote reservoir layout. On BMW applications such as the 2006-2013 BMW 323i, 325i, 328i, 335i, 330i, and Active Steering-equipped 1 Series and 3 Series models, as well as 2013-2019 BMW M5, M6, and M6 Gran Coupe, this reservoir helps maintain clean fluid storage and stable system operation. Cardone builds this part to follow original equipment design, and each unit is tested to confirm proper fit and function.

This part cross-references BMW 32416767161 for the same application.

What It Helps Address

• Leaking reservoir body caused by heat and vibration
• Cracking at the reservoir housing or hose tube connections
• Foaming power steering fluid from trapped air in the system
• Noise or cavitation related to restricted fluid flow
• Misdiagnosed steering pump complaints when the reservoir is the source

Installation Notes and Tips

Depending on the vehicle, the reservoir may be mounted on the firewall, inner fender, or near the power steering pump. Inspect the return and outlet hoses for wear, debris, or internal breakdown before installation. If the fluid is foaming, bleed air from the system after service to prevent noise and pump damage. For BMW M5, M6, M6 Gran Coupe, and Active Steering applications, verify the exact reservoir layout against the vehicle’s OE service information before replacement.

Quality Assurance

Cardone states that this reservoir is 100% tested to help ensure proper fit and function. It is manufactured from OE-grade material and follows the original design for the listed BMW applications, including BMW M5, M6, and 3 Series models. Part number 3R-503 is a new replacement power steering reservoir built for direct service use.