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This guide is for owners of compatible BMW E9x models seeking to replace their front left shock absorber. The SACHS 311 403 provides enhanced cornering stability and road grip through its gas pressure technology and robust construction. A potential caveat is the need to confirm vehicle fitment using the provided tool before purchase.
| Model Part Number | 311 403 |
|---|---|
| Brand | SACHS |
No, the SACHS 311 403 is sold individually for the front left side of the vehicle.
It means the shock absorber uses gas under pressure to prevent the oil inside from foaming. This ensures consistent damping performance, especially during heavy use or high temperatures, and helps prevent aeration.
You must use the vehicle 'Confirmed Fit' option on the product page. This tool checks compatibility based on your vehicle's specific details (make, model, year, sub-model). You can also cross-reference the OE-Numbers provided with your vehicle's original part numbers.
The paired article number, 311 404, refers to the corresponding shock absorber for the opposite side of the vehicle (front right). It is generally recommended to replace shock absorbers in pairs.
The Twin-Tube design is a common and reliable construction method for shock absorbers, featuring two tubes: an inner working cylinder and an outer protective tube. It is known for its durability and effectiveness in most driving conditions.
No, this specific shock absorber (311 403) is designed for vehicles with standard suspension only. Using it on a vehicle with sports suspension may lead to incorrect fitment and performance.
This could indicate a worn shock absorber. Ensure the SACHS 311 403 is correctly installed and compatible with your vehicle. If issues persist, the shock absorber may be faulty or the opposite side shock absorber may also need replacement.
Check that the shock absorber is securely mounted and that all related suspension components (e.g., bushings, mounts) are in good condition and properly tightened. A loose installation can cause noise.
While often related to tire pressure or alignment, a faulty shock absorber can contribute. Ensure the shock absorber is correctly fitted and functioning, and that the opposing shock absorber (front right) is also in good condition.
Compatibility: This shock absorber is designed for the front left position of BMW 3 Series models: 3 Touring (E91), 3 Limousine (E90), 3 Coupe (E92), and 3 Cabrio (E93). It is specifically for vehicles equipped with standard suspension. Always use the vehicle 'Confirmed Fit' option to verify compatibility with your specific vehicle's make, model, and year before purchasing. Refer to the OE-Numbers listed (e.g., 31 31 6 782 329, 6 782 329) to cross-reference with your vehicle's original parts.
Installation: Installation should be performed by a qualified mechanic experienced with suspension systems. The shock absorber features a top pin mounting type. Ensure all mounting hardware is torqued to manufacturer specifications. It is recommended to replace shock absorbers in pairs (front left and front right) for balanced handling.
Care: Shock absorbers are largely maintenance-free. However, it is good practice to periodically inspect the unit for leaks or physical damage during routine vehicle maintenance. Keep the visible parts of the shock absorber clean from excessive dirt and road salt to help preserve the corrosion protection.
