BMW E70 Rear Air Spring is a factory replacement rear suspension airbag designed to correct sagging suspension issues. Specifically engineered for vehicles equipped with Adaptive Drive, this air spring restores the vehicle’s ride height and overall suspension performance.

• Factory Replacement: Ensures a perfect fit and reliable performance with your BMW E70.
• Corrects Sagging Suspension: Restores proper ride height and handling, improving vehicle stability and comfort.
• Compatible with Adaptive Drive: Designed to work seamlessly with vehicles equipped with Adaptive Drive systems.
• High-Quality Construction: Built to meet OEM standards for durability and longevity.
• Enhanced Ride Quality: Provides a smooth and stable driving experience by maintaining optimal suspension settings.

Upgrade your BMW E70 with the Rear Air Spring for reliable suspension performance and enhanced driving comfort.

Drastically improve the looks of your vehicle while improving your vehicle's handling characteristics and/or easily adjust your wheel fitment to allow for the proper clearance when installing parts such as new wheels, big brake kits, or lowering suspension components.Interference from components such as shocks, springs, or control arms are a common issue when installing wheel that are not a direct OE size replacement. By moving your wheels a few millimeters each, you can give yourself enough clearance for proper wheel fitment and give your car a wider stance in the process.

ECS Tuning wheel spacers are constructed of high quality 6061-T6 aircraft grade aluminum and are specifically designed by in-house engineers and cnc machined to exact standards, ensuring the best fitment possible. By carefully measuring the OEM wheel hubs and bore dimensions, these spacers mount with minimal clearance to prevent any vibration, retaining the stock-like vibration free operation. 

ECS Tuning is a performance and genuine parts provider that designs their ECS Tuning branded aftermarket automotive parts in-house to ensure the highest quality and affordability possible. Every part's design is subjected to a rigorous test fit and stress test period to guarantee proper fitment and continued reliability for years to come.

This item fits the following BMWs:
1997-2003 E39 BMW 525i 528i 530i 540i M5
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i
​Front Only
2007-2013 E70 BMW X5M
2007-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

LED Lighting Kit - Footwell is the perfect addition to enhance your BMW’s interior, providing a sleek and modern look after hours. This cost-effective upgrade transforms your car’s ambiance in minutes.

• Offers crisp, clean lighting for footwell areas, glove box, trunk, license plate, dome, door, and vanity mirrors.
• Easy installation with wedge-style LEDs that require no modifications.
• Eliminates dull yellow light from your interior with our comprehensive Interior Lighting Package.
• Provides superior illumination and an upscale appearance for any BMW interior.

Note: Images feature an E92 BMW.

Enhance Your BMW's Performance with Red Line 75W90 Gear Oil

Enhance the performance of your BMW's differentials and manual transmissions with Red Line 75W90 Gear Oil, a top choice for fluid service. This gear oil is ideal for car and light truck differentials, including those in racing applications. It contains a special friction modifier for limited slip differentials and promotes smooth shifting in both cold and hot conditions. Red Line 75W90 exceeds API GL-5 specifications and can be used in transmissions requiring 75W, 80W, or 85W GL-4 gear oils, as well as SAE 30 or 5W/10W30 motor oils. For specific requirements like SAE 90 GL-5 gear oil, Red Line offers compatible alternatives like 75W90NS or 75W140NS Gear Oil.

Benefits:

• Ideal for BMW differentials and manual transmissions
• Special friction modifier for limited slip differentials
• Promotes smooth shifting in various conditions
• Exceeds API GL-5 specifications
• Compatible with a wide range of transmission requirements

If you own an M57-equipped BMW, you already know this twin-turbo diesel powerplant is an absolute torque monster. What you might also know is that all that low-end grunt and high-compression diesel vibration wreaks absolute havoc on your accessory drive system.

From the factory, both the E90 335d and E70 X5 35d utilize a rigid alternator pulley. With each cylinder's fire, the crankshaft experiences a violent micro-acceleration. Because the alternator has a heavy internal rotor spinning at high speeds, it wants to keep spinning at a constant rate. When the engine suddenly slows down (even minutely between firing cycles), the alternator fights the belt. This constant tug-of-war results in extreme stress on your engine's belt-driven components. At best, it’s an annoying, unrefined chirp at idle; at worst, it’s a ticking time bomb for your expensive harmonic balancer.

To solve this issue, many enthusiasts choose to run a clutched alternator pulley (also called an overrunning alternator pulley). A clutched pulley allows the alternator to "freewheel" or coast when the engine slows down, completely isolating its rotational inertia from the belt drive to prevent component wear. While the N52's clutched pulley (12317560483) is a straight bolt-on, the offset is incorrect for the E70 35d's accessory drive. Thankfully, our engineers designed this zinc-coated spacer to provide the precise amount of spacing needed to perfectly align the new pulley with existing belt drive components.