AST Lowering Springs For BMW 5 520i/523i/525i/528i/530i/520D 07/2003-03/2010, Front 50 , Rear 50

The AST Lowering Springs are engineered to provide a refined balance between enhanced vehicle dynamics and maintained ride comfort. Manufactured using advanced cold-coiling technology on state-of-the-art Wafios machines, these springs ensure consistent quality and durability. Designed specifically for BMW 5 Series models 520i, 523i, 525i, 528i, 530i, and 520D produced between 07/2003 and 03/2010, they offer a precise fit and optimal performance.

By lowering the vehicle’s center of gravity by 50 mm at both the front and rear, these springs contribute to improved handling characteristics, reduced body roll, and a sportier stance without compromising the comfort levels expected from OEM components. The progressive spring design adapts to driving conditions, ensuring a smooth yet responsive ride. Constructed from high-quality materials, the AST Lowering Springs are built to withstand rigorous use and come with a lifetime warranty against breaking, reflecting the brand’s commitment to reliability and customer satisfaction.

Installation is straightforward as these springs serve as direct replacements for the original equipment. Their compatibility with a wide range of vehicles—over 2500 models from 1966 onwards—demonstrates their versatility and engineering precision. However, it is important to note that these springs are not suitable for vehicles equipped with level adjustment systems or four-wheel drive (4WD). Additionally, vehicles fitted with factory sports or M-Sports suspensions will experience approximately 25 mm less lowering.

Lowering Specifications

• Front lowering: 50 mm
• Rear lowering: 50 mm
• Progressive spring design for balanced comfort and performance
• Approximately 25 mm less lowering on vehicles with factory sports or M-Sports suspension
• Not suitable for cars with level adjustment systems
• Not suitable for 4WD (four-wheel drive) vehicles

Compatibility

• BMW 5 Series models: 520i, 523i, 525i, 528i, 530i, 520D
• Production years: 07/2003 to 03/2010
• Designed as direct OEM spring replacements
• Applicable to over 2500 vehicle models from 1966 to present

The AST Lowering Springs are an ideal choice for drivers seeking to enhance their BMW’s handling and aesthetics while maintaining the comfort and reliability expected from high-quality suspension components. Backed by a lifetime warranty, these springs provide long-term assurance and performance for discerning automotive enthusiasts and professionals alike.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.