350z Rear Window Wiper Delete

The Nissan 350Z, a modern classic in the sports car world, is often the subject of modification and personalization. One popular, albeit controversial, modification is the rear window wiper delete. This article delves into the technical aspects, engineering considerations, and real-world implications of removing the rear wiper from a 350Z, offering a comprehensive guide for automotive professionals.

Understanding the OEM System

Before considering a deletion, it's crucial to understand the factory system. The 350Z's rear wiper motor is typically a small DC motor, controlled by a relay triggered by the wiper stalk on the steering column. The motor drives a linkage that moves the wiper arm across the rear window. Power is supplied via a dedicated circuit protected by a fuse. The wiper assembly also includes a nozzle connected to the windshield washer fluid reservoir via a small diameter hose. The electrical wiring is integrated into the rear hatch harness.

The engineering rationale for including a rear wiper on the 350Z, a car known for its sleek coupe design, is primarily related to visibility. While the fastback roofline is aesthetically pleasing, it can accumulate dirt and moisture, significantly reducing rearward visibility in inclement weather. This is particularly true in regions with frequent rain, snow, or dusty conditions. Safety standards and regulations in many countries also influence the inclusion of such features.

Technical Aspects of the Delete

A rear wiper delete involves physically removing the wiper arm, motor, and associated hardware from the rear hatch. This typically leaves a hole where the wiper motor shaft protruded. Sealing this hole properly is paramount to prevent water ingress, which can lead to rust, electrical issues, and damage to the interior. Several methods exist for sealing the hole, each with its own set of advantages and disadvantages:

Rubber Plugs: These are the simplest and least expensive option. However, they often lack a secure fit and can degrade over time due to UV exposure and temperature fluctuations, leading to leaks.
Glass Plugs: Custom-made glass plugs provide a flush and aesthetically pleasing finish. They require professional installation and bonding, making them a more expensive option. Color matching to the vehicle's paint is also possible.
Metal Plates: Metal plates, usually aluminum or steel, are secured to the hatch using adhesive or fasteners. They offer a durable and watertight seal but can be visually less appealing than glass plugs unless carefully finished and painted.
3D Printed Plugs: This is a relatively new option that provides the flexibility to create custom plugs with specific shapes and sizes. The material used must be UV resistant and durable to withstand weather conditions.

Electrical Considerations

Removing the wiper motor will trigger a fault in the electrical system. The car may not recognize the wiper switch, leading to minor issues with the car. The following points explain electrical considerations:

Error Codes: Removing the motor may throw an error code depending on how the wiring is set up. It is recommended that the motor be disconnected and the terminals be properly taped with electric tape.
Harness Protection: After disconnecting the motor, the wiring harness should be properly insulated and secured to prevent damage or shorts.

Real-World Performance and Aesthetics

The primary benefit of a rear wiper delete is aesthetic. Many owners prefer the cleaner, more streamlined look without the wiper arm. The removal also reduces weight, albeit marginally. However, the impact on real-world performance is negligible.

The most significant drawback is the loss of rearward visibility in certain conditions. In rain, snow, or dusty environments, the rear window can quickly become obscured, making it difficult to see traffic behind. This can compromise safety, especially when merging or changing lanes. The severity of this issue depends on the driving environment and the owner's driving habits.

Alternatives and Comparisons

Instead of a complete delete, some owners consider alternatives to improve the appearance of the rear wiper system:

Shorter Wiper Blades: A shorter blade can be less visually intrusive while still providing some degree of cleaning.
Upgraded Wiper Arms: Sleeker, more modern wiper arms can improve the overall aesthetic.
Rain-Repellent Coatings: Applying a rain-repellent coating to the rear window can help water bead and roll off, reducing the need for a wiper in light rain.

Comparing these alternatives to a complete delete reveals a trade-off between aesthetics and functionality. A complete delete offers the cleanest look but sacrifices rearward visibility. The alternatives provide a compromise, maintaining some degree of functionality while improving the appearance.

Pros and Cons of Rear Wiper Delete

Pros:

Cleaner, more streamlined appearance
Slight weight reduction
Reduced maintenance (no wiper blade replacements)
Potential for improved aerodynamics (though minimal)

Cons:

Reduced rearward visibility in inclement weather
Potential for water leaks if not properly sealed
Possible error codes
May affect resale value (depending on buyer preference)
Potentially illegal in some jurisdictions, depending on vehicle inspection standards. (Always check local regulations)

Reliability and Maintenance

The reliability of a rear wiper delete depends heavily on the quality of the sealing method. A poorly installed plug or plate can lead to water leaks, rust, and electrical problems. Regular inspection of the seal is recommended, especially after exposure to extreme weather conditions. Any signs of cracks, degradation, or leaks should be addressed promptly to prevent further damage.

If electrical modifications are made, such as disabling the wiper circuit, it's essential to use high-quality connectors and wiring to ensure reliable performance and prevent shorts. Properly insulating and securing the wiring harness is also crucial.

Future Trends

The automotive industry is rapidly evolving, with advanced driver-assistance systems (ADAS) becoming increasingly common. These systems often rely on sensors and cameras mounted on the rear of the vehicle. While the 350Z predates these technologies, future sports cars may incorporate rear-facing cameras to enhance visibility, potentially rendering rear wipers obsolete. Furthermore, advanced hydrophobic coatings are also being developed, drastically reducing the need for windshield wipers on all surfaces. The trend is towards designs that minimize reliance on mechanical wipers in all cars.

However, for classic and enthusiast vehicles like the 350Z, the debate over modifications like rear wiper deletes will likely continue. Personalization and customization remain important aspects of car ownership, and owners will continue to seek ways to express their individual style.

Conclusion

The 350Z rear wiper delete is a modification with clear aesthetic benefits but also notable functional drawbacks. Automotive professionals should advise customers to carefully consider their driving environment and priorities before making this modification. A thorough understanding of the technical aspects, proper sealing techniques, and potential consequences is essential for a successful and reliable outcome.

Looking forward, the automotive industry is poised for significant changes, with electrification, automation, and connectivity transforming the driving experience. While modifications like rear wiper deletes may seem relatively minor in this context, they highlight the enduring importance of personalization and customization in the automotive world. As technology advances, the focus should remain on enhancing both performance and aesthetics while prioritizing safety and reliability.