The ambitious $7,500 project to revitalize a neglected BMW E60 M5 has culminated in its final stages, with the performance sedan receiving a comprehensive overhaul of its suspension, braking system, and wheel configuration. Following a significant paint refresh and previously completed power enhancements, this latest phase focuses on transforming the venerable V10-powered machine into a more capable and visually striking performance vehicle, meticulously documented by the automotive enthusiasts at Speed Academy.
A Deep Dive into the Mechanical Overhaul
The recent efforts centered on meticulously rebuilding and upgrading the E60 M5’s underpinnings. The initial step involved a complete dismantling of the front suspension, paving the way for the installation of high-performance KW Variant 1 coilovers. These units were carefully calibrated to achieve a moderate ride height reduction, striking a delicate balance between enhanced handling characteristics, acceptable ride comfort for daily driving, and an aggressive aesthetic. The decision to opt for KW coilovers reflects a common strategy among enthusiasts seeking to improve the dynamic prowess of the E60 platform, renowned for its potent S85 V10 engine but often criticized for its somewhat soft factory suspension.
Complementing the coilovers, the aging original suspension arms, showing signs of wear and deterioration in their rubber bushings, were replaced with a full suite of Pro Series OE+ components. This choice signifies a commitment to quality and longevity, as these parts are engineered to meet or surpass the stringent standards of original equipment manufacturers. This comprehensive refresh ensures that the M5’s chassis will respond with renewed precision and stability.
Further enhancing the car’s cornering capabilities, a Dinan roll-control kit and a rear sway bar were integrated. Dinan Engineering, a long-standing BMW tuning specialist, is synonymous with performance upgrades that respect the inherent character of BMW vehicles. The addition of these components is specifically designed to significantly reduce body roll during spirited driving, thereby increasing mechanical grip and promoting a more neutral and balanced chassis demeanor. The rear sway bar, in particular, is a critical component for tuning understeer or oversteer characteristics, and the chosen 21-mm Dinan unit is widely regarded by E60 owners, including those with non-M5 variants, as a highly effective upgrade for improving overall handling dynamics.
Reinvigorating the Braking System
The braking system, a crucial element for any performance vehicle, also underwent a significant revitalization. The project incorporated a FCP Euro package, featuring Zimmermann rotors and TechArt brake pads. Zimmermann rotors are recognized for their high-quality construction and consistent performance, while TechArt pads are known for their enhanced stopping power and fade resistance, especially under demanding conditions. This combination promises a substantial improvement in braking feel and effectiveness, essential for controlling the M5’s considerable power.
A noteworthy detail highlighted by the builders was the inclusion of a custom brake bolt within the FCP Euro package. This seemingly small component addresses a common frustration for DIY mechanics working on BMWs: the often-stubborn nature of factory brake hardware. The custom bolt is designed to simplify the removal process, saving time and preventing potential damage to surrounding components. This attention to detail underscores the project’s pragmatic approach, aiming to not only improve performance but also streamline the maintenance and modification experience.
By the conclusion of the mechanical work, the E60 M5 was outfitted with the aforementioned KW coilovers, Pro Series rear control arm, Dinan sway-bar end links, and the potent 21-mm Dinan rear sway bar. This meticulously curated collection of components aims to elevate the M5 from a comfortable grand tourer to a more dynamic and engaging sports sedan.
The Crucial Decision: Wheel and Tire Synergy
A significant portion of this final episode of the build was dedicated to the critical aesthetic and functional decision of selecting the optimal wheel and tire combination. With the M5 now sporting a fresh, vibrant paint job, the wheels play a pivotal role in defining its overall character. Initially, black wheels seemed to be the front-runner, a popular choice that often imparts a more aggressive and modern look. However, the Speed Academy team explored several alternatives to ensure the best possible visual and performance synergy.
The first set of wheels put to the test were BMW Style 359M wheels. These wheels, while aesthetically pleasing and offering a strong OEM-plus appeal, were fitted with tires of an incorrect size during the initial fitting. Despite this setback, the silver finish of the 359M wheels presented a compelling option, harmonizing well with the new paint. However, the rear spacer setup employed for this test was deemed too aggressive, detracting from the desired stance and potentially impacting handling.
The ultimate decision gravitated towards a set of Advan RZDF2 wheels, finished in a striking titanium silver with a polished lip. This choice represents a blend of JDM performance heritage and sophisticated styling. These wheels were paired with Continental Extreme Contact Sport 02 tires, a performance-oriented tire known for its excellent grip, responsive steering feel, and wet-weather capabilities, further enhancing the M5’s dynamic potential.
The front wheels measured 19×9 inches, and a 12mm spacer was initially used. The rear wheels were a wider 19×10.5 inches, and after careful consideration and fitting, a more conservative 5mm spacer was ultimately employed. This adjustment was crucial for achieving a more balanced and visually appealing fitment, ensuring the wheels sat flush without excessive protrusion or interference with the suspension components. The builder expressed particular admiration for the concave design of the Advan wheels and the way their silver hue elegantly complemented the freshly applied paintwork.
The chosen wheel and tire combination dramatically altered the car’s visual presence. The narrator observed that the silver wheels lent the M5 a more three-dimensional and aggressive stance, imbuing it with a subtle yet distinct Japanese tuner aesthetic while simultaneously retaining a sophisticated OEM-plus feel. This balance is often the holy grail for automotive enthusiasts seeking to personalize their vehicles without sacrificing their inherent character.
Addressing the Lingering Electronic Glitch
Despite the significant mechanical and aesthetic progress, the E60 M5 build still faces one remaining hurdle: an issue with the iDrive/stereo system. The problem initially stemmed from the iDrive controller being unplugged. Upon reconnecting it, the diagnostic process revealed that an updated CIC (Car Communication Computer) unit was not communicating correctly with the controller. To rectify this, a pre-LCI (Life Cycle Impulse) module has been ordered, which is expected to resolve the electronic communication conflict and restore full functionality to the infotainment system. This type of electronic gremlin is not uncommon in complex vehicles of this era, and the methodical approach to troubleshooting demonstrates the team’s commitment to a complete and seamless restoration.
A Resounding Success and Future Prospects
Upon the completion of these extensive upgrades, the builder unequivocally considers the E60 M5 project a resounding success. The combination of the new paint color, the comprehensively upgraded suspension and braking systems, and the perfectly chosen Advan wheels has transformed what began as a rough, $7,500 project into what is now perceived as an aggressive, highly personalized performance sedan. This transformation speaks volumes about the potential for revitalization that lies within seemingly neglected performance vehicles.
The next steps for this meticulously rebuilt E60 M5 are clearly defined and promise further excitement. The vehicle is slated for a dyno session to accurately measure its power output, followed by track testing to evaluate its enhanced dynamic capabilities in a demanding environment. Crucially, it will also undergo a comparative test against a Lexus GS430, allowing for a direct assessment of its performance credentials against a contemporary competitor. This methodical progression from project completion to real-world testing is a hallmark of thorough automotive journalism and enthusiast endeavors.
The Bottom Line: A Modern Performance Persona with an OEM+ Soul
In essence, this latest episode of the Speed Academy E60 M5 build serves as the triumphant payoff for months of dedicated work. Rather than merely restoring the vehicle to its original factory specifications, the builder has embarked on a journey to imbue it with a modern, performance-oriented setup while meticulously preserving and enhancing its OEM-plus character. The substantial improvements to the suspension and braking systems directly translate into a more engaging and capable driving experience, addressing some of the inherent limitations of the stock E60 M5. The striking silver Advan wheels, meanwhile, provide the definitive visual finishing touch, solidifying the car’s aggressive yet refined new persona. This project exemplifies how thoughtful upgrades can breathe new life into iconic performance cars, making them relevant and thrilling for a new generation of enthusiasts. The $7,500 investment, coupled with countless hours of labor and expertise, has yielded a vehicle that not only looks the part but is poised to perform exceptionally.
