The BMW M6 / 635CSi (E24), produced between 1987-1989, represents a captivating chapter in BMW's storied history as a high-performance grand tourer. With approximately 5,800 units manufactured globally, this iconic model features the S38B35 engine, a 3.5L inline-six engine that showcases BMW's Motorsport heritage. In Houston, we recognize the value of these vehicles not just as modes of transportation, but as collectible works of art that deserve preservation.
Lone Star Wheels is committed to helping owners of these magnificent machines transition to new custodians. We understand the passion that accompanies the E24 M6 and 635CSi models, and we encourage donor vehicles that exhibit originality and low mileage. Our team emphasizes preventive maintenance and respects the meticulous care required to uphold the vehicle's integrity, ensuring that future enthusiasts can continue to enjoy their drivability and performance.
📖Generation guide
E24 M6 • 1987-1988
The US-spec M6 features the S38B35 engine producing 256hp and shares many components with the Euro M635CSi. This rare variant is highly sought after by collectors.
Euro M635CSi • 1984-1989
With a 286hp version of the S38B35 engine, this model enjoys a distinct following and represents a different value tier compared to the M6.
635CSi • 1984-1989
This non-M variant features the M30B35 engine producing 182hp. Despite its lower-tier value, it remains a classic BMW grand tourer.
Known issues by generation
The E24 M6 and 635CSi are not without their quirks. The S38B35 engine in the M6 requires careful attention to its timing chain and guide replacement around the 100-150k mile mark to prevent costly damage. Owners should also be aware of the six individual throttle bodies that need proper sync and balance for peak performance. The M30B35 engine in the 635CSi is notorious for head-gasket failures alongside common thermostat and water pump replacements. Additionally, rust issues at typical E24 locations, including the A-pillar and rocker panels, require vigilance to maintain the vehicle's integrity and value.
Donation value by condition + generation
As a blue-chip BMW M halo analog-era collector vehicle, the E24 M6 commands immense value, with clean, original-paint examples fetching between $50-130K at auctions like RM Sotheby's and Gooding & Company. The U.S. market's limited production run of the M6 adds to its desirability, particularly for those equipped with a manual transmission, which carries a significant collector premium. Matching-number documentation and BMW Motorsport Garching build-plate authentication are essential for collectors, as is the condition of the car, especially its original paint and authenticity. Preserved cars are more likely to achieve top dollar, making preventive maintenance essential.
Donation process for this model
When considering a donation of your E24 M6 or 635CSi, please remember that a qualified appraisal is highly recommended. With documented BMW Motorsport or vintage M specialist credentials, appraisers can provide necessary evaluations for IRS Form 8283 Section B. This is crucial since nearly every donation exceeds the $5,000 threshold. Enclosed transport is advised for pristine examples to ensure their condition is preserved. Additionally, proper documentation regarding the vehicle's build-plate authentication and matching numbers will enhance its recognition within the collector community.
Houston regional notes
In Houston, vintage BMW enthusiasts have access to a wealth of resources and community events, including the BMW-CCA Bimmerfest and the Legends of the Autobahn concours. It's vital for E24 M6 and 635CSi owners to connect with local vintage BMW Motorsport specialists for maintenance, particularly given the rust issues that can plague vehicles from salt-belt regions. Climate-controlled storage solutions are also available, ensuring your classic BMW remains in optimal condition for years to come.
FAQ
What is the recommended timing chain service interval for the S38B35 engine?
How can I verify if my BMW has the correct build plate authentication?
What is the manual transmission collector premium for the E24 models?
Are there specific regulations for grey-market imports?
How do I know if my original paint qualifies as premium?
Is a qualified appraiser necessary for Form 8283 Section B?
What are the signs of head-gasket failure in the M30B35 engine?
Other model-specific guides
If you own a BMW M6 or 635CSi (E24), consider donating your vehicle to Lone Star Wheels. Not only will you be contributing to the preservation of automotive history, but you’ll also help fellow enthusiasts continue to enjoy these remarkable machines. Your donation can significantly impact the community and ensure that future generations appreciate the legacy of BMW's M division. Contact us today to learn more about the donation process.
Vehicle Donation Resources & Guides
In-depth tax, paperwork, and donation logistics guides published by our editorial team — bookmark these before you donate.