DATSUN 73870-M8500 Nos Sunny Sunroof Glass B310

( Manufacturer Part Number: 73870-M8500 ), ( Vintage Part: Yes ), ( Universal Fitment: No )

Review DATSUN Nos Sunny Sunroof Glass fits 1979–1981

The **Datsun 73870-M8500 NOS (New Old Stock) Sunny B310 Sunroof Glass** from the late 1970s specifically spanning the model years **1979, 1980, and 1981** represents a rare and highly sought-after piece of automotive history, blending classic Japanese engineering with timeless design. This meticulously preserved original equipment sunroof glass, still in its factory-sealed condition, is a testament to the craftsmanship of an era when attention to detail and durability were paramount. The B310 Sunny, Datsun s compact yet sophisticated four-door sedan, was renowned for its refined ride, efficient inline-four engine, and elegant styling that seamlessly merged European influences with Japanese precision. The sunroof glass, a signature feature of the B310 s premium trim levels, was not only a practical addition for ventilation and natural light but also a stylish nod to luxury, offering a sense of openness and sophistication that set it apart from its contemporaries. This NOS unit, untouched by installation or modification, retains its original factory finish, including the protective plastic wrap and any accompanying packaging materials, ensuring its authenticity and historical integrity. Whether you're a collector aiming to restore a B310 to its original glory or an enthusiast seeking to enhance the ambiance of a classic car, this sunroof glass is a prized component that adds both functionality and aesthetic appeal. Its inclusion in a restoration project would elevate the vehicle s allure, making it a standout example of the Sunny s enduring charm and the meticulous care taken in its original assembly.

### **Pros and Cons of Buying a Datsun 73870 (M8500) NOS (1979 1981) with Sunny B310 Sunroof and Glass**

#### **Pros**

1. **Classic and Unique Design**

The 73870 (M8500) is a rare and distinctive model, blending a boxy yet elegant silhouette with a sporty, luxury-oriented aesthetic. Its presence on the road is memorable, making it a standout choice for enthusiasts who appreciate vintage Japanese cars.

2. **Sunny B310 Sunroof (Factory or Aftermarket)**

The inclusion of a functional sunroof (especially if it s original or well-maintained) adds significant value and comfort. A working sunroof enhances the driving experience, making it more enjoyable for long trips or sunny days. If the sunroof is NOS (never opened or restored), it could be a highly desirable feature.

3. **Potential for Restoration or Preservation**

If the car is in a state where it can be restored to original condition (or preserved as-is), the 73870 holds nostalgic appeal. Many collectors value underrestored or original-spec examples, especially from the late '70s/early '80s when Datsun was pushing luxury and performance.

4. **Engine and Performance Potential**

The M8500 was equipped with a **2.4L L24E inline-six engine** (in later models) or a **2.0L L20E** (earlier versions), both of which are known for reliability and mod potential. With proper maintenance, these engines can last decades. The car also features a **5-speed manual transmission** (or 4-speed automatic in some markets), which is highly sought after by gearheads.

5. **Parts Availability and Community Support**

While not as common as older Toyotas or Hondas, Datsun/Nissan parts for the 73870 series are still accessible, especially for major components. The classic car community is active, with forums (e.g., Datsun737, NissanForums) offering support for restoration projects.

6. **Potential for Investment Value**

If the car is rare, well-documented, and in good cosmetic condition, it could appreciate over time, especially if demand for Japanese luxury classics grows. The sunroof and NOS status further enhance its collectible appeal.

7. **Driving Dynamics**

The 73870 was designed with a focus on comfort and handling, featuring independent front suspension, rear live axles, and power steering. While not a sports car, it drives smoothly and offers a relaxed yet engaging experience.

---

#### **Cons**

1. **High Maintenance and Restoration Costs**

The 73870 is not a "set-and-forget" car. Rust, worn suspension components, and aging electrical systems are common issues. If the car is not already in excellent condition, restoring it to running order (especially with a NOS sunroof) will require significant time, money, and expertise. Labor costs for Japanese classics can be high.

2. **Rust and Structural Issues**

Many examples from this era suffer from rust, particularly in the floor pans, wheel wells, and lower body panels. A thorough inspection (or a known rust-free example) is essential. If the car has been stored improperly, structural damage could be severe.

3. **Sunroof Reliability Concerns**

- **Leaks:** Sunroofs are notorious for water intrusion, which can lead to headliner rot and electrical issues.

- **Mechanical Wear:** If the sunroof has been opened/closed, the tracks, seals, and motor may need replacement.

- **Electrical Failures:** The sunroof s motor and switches can fail over time, requiring restoration or replacement parts.

4. **Limited Market for Daily Use**

The 73870 is not practical as a daily driver. Fuel economy is poor by modern standards ( 12 15 MPG combined), and the interior is basic (vinyl seats, manual adjustments). If you need a reliable, low-maintenance car, this is not it.

5. **Engine and Transmission Wear**

- **Valve stem seals** leaking oil.

- **Distributor or ignition problems** (if equipped).

- **Transmission wear** (especially if the 5-speed manual has been abused).

A pre-purchase inspection (including a compression test and road test) is critical.

6. **Electrical System Challenges**

The 73870 s electrical system is outdated and can be finicky. Issues like faulty wiring, failing alternators, or corroded connectors are common. Restoring the electrical system to modern standards can be complex and expensive.

7. **Depreciation Risk**

While some classics appreciate, others depreciate rapidly if they are not in pristine condition. If the car has been poorly maintained or modified, its value could drop rather than grow. The sunroof and NOS status help, but the overall condition is the biggest factor.

8. **Insurance and Storage Costs**

Classic cars often have higher insurance premiums due to their value and parts cost. Additionally, secure storage (garage, climate-controlled) is recommended to prevent further deterioration.

---

### **Conclusion**

- **Enthusiasts who prioritize restoration projects** and have the time, money, and skills to bring it back to original or better condition.

- **Collectors who appreciate rare Japanese luxury cars** and are willing to invest in preservation.

- **Drivers who enjoy the unique blend of comfort, style, and nostalgia** and don t mind occasional mechanical challenges.

- **Beginners** who lack mechanical experience or budget for repairs.

- **People seeking a reliable, low-maintenance daily driver.**

- **Those who cannot commit to long-term restoration or storage.**

1. **Get a thorough inspection** by a trusted mechanic familiar with Datsun/Nissan classics.

2. **Verify the sunroof s condition** test it fully and check for leaks or mechanical issues.

3. **Check for rust** inspect the frame, subframe, and body panels.

4. **Review service history** even if minimal, any records help assess past care.

5. **Budget for restoration** expect to spend **$10,000 $30,000 ** depending on the car s condition.

6. **Consider insurance** get quotes before purchasing, as premiums may be high.

### **Final Recommendation**

- You have **realistic expectations** about the work required.

- You are **passionate about the project** and willing to invest the necessary time and resources.

- You can **afford unexpected repairs** without financial strain.

**If you are a first-time classic car buyer or need a practical vehicle, this is not the right purchase.** However, for the right buyer, a well-preserved or restorable 73870 with a functional sunroof can be an **exciting and rewarding** addition to a collection or a **dream project car** that becomes a labor of love. Always **prioritize condition over rarity** when making the final decision.

Details:

NOS NISSAN DATSUN SUNNY B310 310 SUNROOF GLASSOEM PART NUMBER 73870-M8500 1979 1980 1981 THIS MAY FIT OTHER model's 200SX AND 720 AROUND THE SAME YEARS.

part #: 73870m8500 prices

• $19.99-$145.00

specifications vintagwinde:

• for makes: Datsun
• for years: 1979-1981
• mpn: 73870-m8500
• vintage part: Yes
• universal fitment: No

shipping vintagwinde:

• cost: $27.72
• transit: 4-9 Days
• carrier: FedEx
• type: Calculated
• class: Economy
• service: FedEx Ground Economy

seller vintagwinde:

• city: Neosho, Wisconsin
• rating: 98.0%
• # reviews: 12361

payments vintagwinde:

• other
• credit card: Diners-club
• wallet: Paypal

general vintagwinde:

• Exterior Parts Accessories > Glass Window Parts > Window Seals, Gaskets Trims
• condition: Used

offer vintagwinde:

• started: May 14, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 5
• best offers: True

returns vintagwinde:

• policy: No Returns

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