Support Desert Wheels: Donate Your BMW M6 / 635CSi

The BMW M6 and 635CSi (E24) are iconic representations of luxury and performance from the late 1980s, capturing the hearts of collectors and enthusiasts alike. With only around 5,800 units produced worldwide, this hand-built grand-tourer embodies the pinnacle of BMW engineering and motorsport heritage. In Arizona, we see a growing community of enthusiasts who appreciate the blend of style, comfort, and exhilarating performance that these vehicles offer.

Donating your E24 M6 or 635CSi to Desert Wheels not only helps preserve this automotive legacy but also contributes to an appreciation of vintage BMWs in our community. The realities of preventative maintenance, such as timing chain replacements and engine authentications, are vital in preserving these vehicles for future generations. Our organization strongly advocates for thorough documentation and qualified appraisals, ensuring that each donation is handled with the respect it deserves.

📖Generation guide

E24 M6 • 1987-1988

The US-market E24 M6 features the S38B35 3.5L I6 engine, marking the high-performance M variant of the E24 chassis. It's a limited-run model that commands a premium among collectors.

Euro M635CSi • 1984-1989

The Euro-spec M635CSi also features the potent S38B35 engine but produces 286hp. It serves as a significant collector's item distinct from the US M6.

635CSi (non-M) • 1984-1989

The 635CSi, powered by the M30B35 engine, represents a lower-tier option with 182hp. It appeals to enthusiasts but lacks the M designation's collector cachet.

Known issues by generation

Both the M6 and the 635CSi face specific issues tied to their engine codes. The M6’s S38B35 engine requires special attention to the timing chain and guides, typically needing replacement between 100k-150k miles. A common symptom is timing chain rattle, which necessitates a $3,000-$6,000 preventive service. The M30B35 engine in the 635CSi can suffer from head gasket failures, with preventive services costing between $2,000-$4,000. Additionally, syncing the six individual throttle bodies on the S38 is critical for optimal performance, and failing to do so can hinder drivability.

Donation value by condition + generation

The value of the E24 M6 and 635CSi is driven by their rarity and specific conditions. Clean, original-paint examples of the M6 can fetch between $50,000 and $130,000 at auction, while well-maintained Euro M635CSi variants hold distinct value as well. Manual transmission models see a significant premium over automatics, which vary in desirability. Proper documentation and authentication from BMW Motorsport Garching are non-negotiable for collectors, ensuring that matching numbers are verified, which is critical to maintaining their value in the collector market.

Donation process for this model

Donating your M6 or 635CSi is an impactful way to contribute to the preservation of automotive history. We strongly recommend obtaining a qualified appraisal to ensure accurate valuation, especially since donations at this tier easily surpass the $5,000 threshold. You'll need to prepare the IRS Form 8283 Section B, and we encourage enclosed transport for valuable original examples. If your vehicle is a grey-market import, ensure you have the necessary federal documentation, including FMVSS and EPA bond-release compliance.

Arizona regional notes

Arizona offers a vibrant community for vintage BMW enthusiasts. With independent restorers skilled in S14, S38, and M30 engine codes, you can find the right expertise to maintain your vehicle. The dry climate is generally favorable for E24 preservation, minimizing rust issues common in salt-belt regions. Events like Bimmerfest and local concours gatherings foster a rich community spirit, making Arizona a great place for BMW M6 and 635CSi owners.

FAQ

What is the timing chain service interval for the S38 engine?

The S38 engine in the M6 typically requires timing chain and guide replacements every 100,000 to 150,000 miles to prevent rattle and potential engine damage.

How can I verify my vehicle's authenticity?

Authenticity can be verified through the BMW Motorsport Garching build-plate, ensuring the engine code matches the chassis. This is crucial for collector value.

What are the benefits of donating my BMW?

Donating your BMW provides a tax deduction and helps preserve a significant piece of automotive history, supporting the future of the vintage BMW community.

Is there a premium for manual transmission models?

Yes, manual transmission models of the E24 M6 are highly sought after and can command significant premiums over automatic versions, reflecting the collector's preference.

What documentation do I need for grey-market imports?

Grey-market imports require comprehensive documentation, including federal compliance papers, to ensure they meet all regulatory standards for registration and donation.

How do I ensure my vehicle's value is appraised correctly?

It's essential to work with a qualified appraiser familiar with vintage BMW values. They will help guide you through the documentation process for tax deductions.

What should I be aware of regarding original paint vs. factory color changes?

Original paint is a critical aspect for collectors, and any factory color change can significantly impact value. Ensure authenticity to maintain desirability.

Other model-specific guides

BMW M3 E30

BMW M3 E30 donation →

BMW M5 E28

BMW M5 E28 donation →

BMW M3 GT (E36)

BMW M3 GT E36 donation →

For owners of the E24 M6 and 635CSi, contributing to Desert Wheels is a chance to ensure that these remarkable vehicles continue to inspire future generations. Your donation helps uphold the legacy of BMW's high-performance heritage while providing a tax benefit to you. Together, let's celebrate and preserve the spirit of the 1980s-90s BMW M halo era!