As a proud owner of a BMW M6 or 635CSi from 1987 to 1989, you appreciate the legacy of these hand-built grand tourers. With only around 5,800 M6 variants produced worldwide, each model represents a unique chapter in automotive history. The E24 chassis is celebrated for its striking design and exceptional performance, powered by the illustrious S38B35 engine, a direct descendant of the M1 supercar lineage. In New Mexico, where the sun shines on these classic coupes, it's the perfect time to consider their impact on the collector market, where clean, original-paint examples can reach $50,000 to $100,000 or more.
Donating your M6 or 635CSi not only helps preserve this piece of automotive art but also provides a tax-deductible contribution to AutoLift. Our mission is to connect classic car enthusiasts, ensuring these collector vehicles are passed to passionate caretakers. With an emphasis on preventive maintenance, proper documentation, and a focus on maintaining originality, every donation contributes meaningfully to the appreciation and preservation of these iconic machines.
📖Generation guide
E24 M6 • 1987-1988
The US-market M6 from 1987-1988 features the high-performance S38B35 engine, producing 256hp, and is often sought after for its unique specifications and limited production.
Euro M635CSi • 1984-1989
This Euro variant shares the same S38B35 engine but boasts enhanced performance with 286hp. Its distinct value tier is recognized in the collector's market, especially with proper documentation.
635CSi Non-M • 1984-1989
Powered by the M30B35 engine, the 635CSi is a lower-tier value model, producing 182hp in US specs, and is less sought after than its M counterparts.
Known issues by generation
The BMW M6 and 635CSi (E24) have a few known issues that potential donors should consider. For the M6, the S38B35 engine should undergo timing chain and chain guide replacements, typically recommended every 100,000 to 150,000 miles to avoid costly repairs. Chronic oil leaks from valve cover gaskets and head gasket failures in the M30 variant are common. Owners should be vigilant for signs of rust around the A-pillar drip rail and rocker panel seams, especially in regions with harsh winters. Maintaining a thorough service history, especially around timing chain and throttle body synchronizations, ensures the vehicles remain viable for collectors.
Donation value by condition + generation
In the collector market, M6 and 635CSi models maintain high value, particularly for those that are in original condition with matching numbers. The E24 M6 typically commands a price range of $50,000 to $130,000, reflecting its status as a blue-chip BMW M halo vehicle. Vehicle documentation, including the BMW Motorsport Garching build plate and service receipts, is essential for verifying authenticity and maintaining value. Original paint and color integrity significantly influence value, with halo colors such as Diamond Black and Cinnabar Red always in demand. Manual transmission variants enjoy a substantial collector premium, further enhancing their desirability in auction platforms.
Donation process for this model
Donating your BMW M6 or 635CSi is a rewarding process. We strongly recommend engaging a qualified appraiser with documented expertise in BMW Motorsport vehicles for accurate valuation. IRS Form 8283 Section B is heavily applicable, with the potential for significant tax deductions as most donations exceed the $5,000 threshold by multiple factors. To safeguard your vehicle, we advise enclosed transport for matching-numbers examples. Make sure to have all necessary documentation, including federal compliance for grey-market imports where relevant, ensuring a smooth donation experience.
New Mexico regional notes
In New Mexico, the landscape for M6 and 635CSi owners is vibrant, with a growing community of vintage BMW enthusiasts. Local independent restorers specializing in BMW Motorsport vehicles provide a crucial resource for maintenance and restoration. Events such as BMW-CCA Bimmerfest and the Legends of the Autobahn concours create opportunities to connect with other collectors. Given the region's arid climate, preserving vehicle integrity is easier compared to salt-belt states, making it essential for owners to take advantage of climate-controlled storage for low-mileage preservation.
FAQ
What are the timing service intervals for the S38B35 engine?
How can I verify my M6's authenticity?
What's the difference in value between manual and automatic transmissions?
Is there a need for an appraiser when donating?
What documentation is required for a grey-market Euro-import?
How can I maintain my E24's original paint?
What are the signs of factory color change?
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.