BMW Basic Subframe Bushing Kit Rear - E46SUBKIT1

Product Information

A subframe mount bushing (also referred to simply as a subframe mount) is a vibration-isolating bushing used to connect the front and rear subframe to the vehicle’s main body or unibody. The subframe itself serves as a structural framework to mount key assemblies such as the suspension, engine, and transmission. Because the drivetrain and suspension are mounted to the subframe, they naturally transmit vibrations to the body of the car. The subframe mount acts as an additional cushion, absorbing vibrations, shocks, and road noise while allowing some flexibility in the subframe’s movement. This helps reduce stress on the vehicle’s body and provides a smoother, more comfortable ride.

There are a few common types of subframe mounts. In an OE application such as a stock vehicle, the mount is typically made of solid rubber, voided rubber (some holes to increase flexibility), or occasionally hydraulic-filled rubber. In performance and race applications, minimizing movement in the subframe is important to maintain correct suspension geometry during high G-loads, so going to polyurethane mounts or reinforcements is a popular upgrade.

Aging or torn subframe mounts can cause several issues, including poor handling or tracking of the wheels, inability to maintain an alignment with abnormal tire wear, and bangs or clunks when transferring load front to back, like when braking or accelerating. Inspect the mounts for cracks or tears, or leaks if the mount is hydraulic.

• Bangs and Clunks: If you are experiencing clunks or bangs when going over bumps, or when braking or accelerating is a sign that the entire subframe is moving around excessively and the mounts may be bad.
• Increased Vibration (NVH): Subframe mount bushings are designed to isolate vibrations from the engine and suspension. When they go bad, they will not effectively absorb NVH, and you will feel more vibrations transferred to the cabin.
• Handling and alignment issues: Since the suspension is connected to the subframe, the mounts must be in good shape. If they aren't, the suspension will have more freedom of movement independent from the car body/frame, and it may also be difficult to maintain an alignment.
• Excess Movement: With the car securely off the ground, use a lever like a pry bar between the subframe and the body of the car. If there is excess movement and it is easy to shift the subframe, the mounts should be replaced.

About Corteco

Corteco is one of the leading suppliers of sealing and vibration control components. Through their parent company Freudenberg Group, they are an OEM supplier for most car manufacturers around the world. Corteco stands as a distinguished entity within the Freudenberg Group, renowned for its unwavering commitment to excellence and innovation in the aftermarket industry. As an integral part of the Freudenberg Group, Corteco embodies a legacy of precision engineering, superior quality, and customer-centric solutions that have consistently surpassed industry standards.

Passengers can enjoy a comfortable and safe journey, knowing their vehicle is equipped with top-quality components. As Freudenberg’s aftermarket distribution arm, Corteco supplies OE-quality spare parts directly from the Original Equipment Manufacturer (OEM) – Freudenberg to the Independent Aftermarket, ensuring passenger cars are restored to their original setup post-repair.

Understanding the diverse needs of drivers, Corteco offers OE-quality spare parts tailored specifically for passenger cars. From rubber-metal and steering & suspension parts for a smooth ride to reliable sealing solutions and micronAir filters for the best air quality in the cabin, Corteco provides a comprehensive range of precision-engineered automotive spare parts.

Originally founded in 1849 as a leather tannery Freudenburg started making seals in 1932 with the invention of the Simmerring®. This seal style quickly replaced felt seals as the new standard for radial shaft sealing rings for rotating shafts/assemblies. Freudenburg began engineering and manufacturing vibration control technology with shock absorbers and bushings in 1957. It was in that same year that Freudenburg partnered with an Italian seal manufacturer Corte & Cosso, creating the Corteco brand. Continuing their history of innovation, Corteco introduced Micronair cabin filters in 1989 and quickly became the market leader in cabin filtering technology.

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