The BMW M6 and 635CSi (E24), produced between 1987 and 1989, mark a significant chapter in the history of grand tourers. Approximately 5,800 of these exquisite vehicles were crafted, embodying the essence of BMW's engineering excellence with a distinctive hand-built M Motorsport touch. Known for their timeless design and dynamic driving experience, both the US-market M6 and Euro-market M635CSi are increasingly recognized as appreciating collector pieces, with values soaring into the $50,000-$130,000 range for pristine, original-paint examples.
As dedicated enthusiasts of this era of BMW, we invite you to consider donating your E24 M6 or M635CSi. Each donation is not just a generous act; it’s a way to ensure the legacy of these iconic models continues for future generations. Your contribution can come with significant tax benefits, especially considering the collector value of well-maintained examples. We recommend working with a qualified appraiser to determine the fair market value of your vehicle and ensure its proper documentation.
📖Generation guide
E24 M6 (US) • 1987-1988
The M6 variant features the S38B35 3.5L inline-six engine, producing 256hp. This model is known for its manual transmission being the more desirable option among collectors.
M635CSi (Euro) • 1984-1989
Euro-spec M635CSi variants boast the S38B35 engine tuned to 286hp. These models feature a competitive edge in performance but require careful verification of grey-market documentation.
635CSi (Non-M) • 1984-1989
This non-M variant is equipped with the M30B35 engine, producing 182hp in US specifications. While it shares the E24 chassis, its collector value is significantly lower than the M6.
Known issues by generation
The E24 M6 and M635CSi are prized for their performance, yet they come with known maintenance needs. The S38B35 engine in the M6 often requires timing-chain and chain-guide replacements around the 100,000 to 150,000 mile mark, with preventive service costs ranging from $3,000 to $6,000. For the M635CSi, watch for head-gasket failures in the M30B35 engine, along with thermostat and water pump issues that may incur $2,000 to $4,000 for preventive care. Additionally, both models require careful attention to throttle-body synchronization, particularly for the M6 with its six individual throttle bodies, crucial for optimal driving experience.
Donation value by condition + generation
As appreciating assets, the BMW M6 and M635CSi models represent blue-chip investments in the collector car market. The E24 M6, with its hand-built BMW Motorsport heritage, commands a premium for well-maintained, original-paint examples—especially in sought-after colors such as Diamond Black and Cinnabar Red. Manual transmission variants can see price increases of $10,000 to $25,000 over automatic versions, solidifying their collector status. Documentation, including matching-numbers authentication and maintenance records, is essential in establishing value and ensuring any future transactions reflect its true worth.
Donation process for this model
When considering a donation of your BMW M6 or M635CSi, it’s critical to work with a qualified appraiser who understands the unique attributes of these models. IRS Form 8283 Section B will apply, especially since every donation will cross the $5,000 threshold by a significant margin. We strongly recommend enclosed transport for vehicles with matching-numbers and original paint to maintain their value. Documentation for BMW Motorsport Garching build plate authenticity and adherence to federal 25-year rule compliance will be necessary, especially for grey-market imports.
Washington regional notes
For BMW M6 and 635CSi (E24) owners in Washington DC, the local automotive community offers a wealth of resources. Independent restorers specializing in vintage BMW models are available, ensuring your vehicle receives the expertise it deserves. BMW CCA events, like Bimmerfest and Legends of the Autobahn, provide excellent networking for enthusiasts. Given the E24's susceptibility to rust, especially in salt-belt areas, climate-controlled storage is highly recommended to preserve these iconic vehicles, keeping them in pristine condition for years to come.
FAQ
What are the common service intervals for S38 and M30 engines?
How do I verify the BMW Motorsport Garching build plate?
What is the significance of a manual transmission in the M6?
What should I know about grey-market Euro-import compliance?
How can I identify a Sport Evolution or GT homologation vehicle?
Do I need a qualified appraiser for my donation?
How can I tell if my car has original paint?
Other model-specific guides
Vehicle Donation Resources & Guides
In-depth tax, paperwork, and donation logistics guides published by our editorial team — bookmark these before you donate.