Oem And Aftermarket Side Mirror Options And Installation For The 240sx

The Nissan 240SX, a beloved chassis for its responsive handling and tuner-friendly nature, often sees its fair share of modifications. One area ripe for improvement, or simple replacement, is the side mirrors. Whether you're dealing with a cracked housing, faded finish, or simply seeking a more aggressive aesthetic, understanding your options and the installation process is key. This guide delves into both OEM and aftermarket side mirror choices for the 240SX, covering the technical aspects and installation procedures.

OEM Side Mirrors: A Known Quantity

The OEM (Original Equipment Manufacturer) side mirrors for the 240SX are a solid starting point. They offer guaranteed fitment and maintain the original factory appearance. Understanding the nuances of OEM mirrors can be beneficial, even if you ultimately opt for an aftermarket solution.

Variations Across Model Years

It's crucial to recognize that even within the 240SX lifespan (1989-1998 in North America), there are subtle differences in side mirror designs. The S13 (1989-1994) models, for instance, have slightly different mirror shapes and mounting points compared to the S14 (1995-1998) models. Within the S13 generation, you also have differences between the pre-facelift (1989-1990) and facelift (1991-1994) models, mainly concerning minor styling tweaks.

Furthermore, the presence of features like power mirrors can influence your choice. If your car came equipped with power mirrors, replacing them with manual mirrors will require disabling the power mirror circuit, or simply leaving the harness unconnected. Converting from manual to power mirrors requires running new wiring and installing the necessary switch, adding complexity to the project.

Technical Specifications and Considerations

OEM mirrors are typically constructed from durable ABS plastic, designed to withstand the elements. The reflective glass is coated with a metallic layer to provide a clear and accurate reflection. Power mirrors utilize small electric motors and gears to adjust the mirror angle, controlled by a switch inside the cabin.

Important Note: When sourcing OEM replacement mirrors, ensure you are purchasing the correct mirror specific to your 240SX's year and model. Using an incorrect mirror may result in fitment issues and require modifications.

Consider the condition of the mirrors you are purchasing. Used mirrors may have scratches, cracks, or faded finishes. Check the functionality of power mirrors before buying them. New OEM mirrors, while the most reliable option, can be quite expensive and may be difficult to find, especially for older models.

Aftermarket Side Mirrors: Style and Performance

The aftermarket offers a vast array of side mirror options for the 240SX, ranging from purely aesthetic upgrades to performance-oriented designs. These mirrors can enhance the look of your car and potentially improve visibility.

Types of Aftermarket Mirrors

1. Sport Mirrors: These mirrors are designed for a more aggressive look, often featuring smaller profiles and aerodynamic shapes. They come in various styles, including those resembling popular racing mirrors. Many sport mirrors prioritize aesthetics over optimal field of view, so consider this carefully.

2. JDM-Style Mirrors: Inspired by Japanese Domestic Market (JDM) designs, these mirrors often feature unique shapes, blue-tinted glass, and carbon fiber accents. They can add a distinct JDM flair to your 240SX.

3. Universal Mirrors: These mirrors are designed to fit a wide range of vehicles, including the 240SX. They typically require some level of modification for proper fitment, such as drilling new mounting holes or using adapter plates. Be cautious when purchasing universal mirrors, as fitment can be challenging.

4. Powered Mirrors with Updated Features: Some aftermarket manufacturers offer powered mirrors with features not found in the OEM options, such as integrated LED turn signals or heated mirrors. These can enhance both safety and convenience.

Technical Considerations and Installation

Installing aftermarket mirrors can range from straightforward to complex, depending on the mirror type and the level of modification required. Here's a breakdown of key technical aspects:

1. Mounting: Check if the aftermarket mirror has a compatible mounting pattern with your 240SX's existing mounting holes. If not, you'll need to drill new holes, which requires careful measurement and precision. Adapter plates can sometimes be used to bridge the gap between incompatible mounting patterns.

2. Wiring (for Power Mirrors): If you're installing power mirrors, you'll need to connect the wiring harness to your car's electrical system. This may involve splicing wires or using adapter harnesses. Consult a wiring diagram for your 240SX to ensure proper connections. Pay attention to wire gauge and ensure adequate insulation to prevent shorts.

3. Visibility: Consider the field of view provided by the aftermarket mirror. Smaller mirrors may reduce visibility, which can compromise safety. Look for mirrors with convex glass, which can help to widen the field of view.

4. Build Quality: Choose mirrors made from durable materials that can withstand the elements. ABS plastic is a common choice, but higher-quality materials like carbon fiber or aluminum can offer greater strength and longevity. Inspect the mirror for any signs of poor construction, such as loose joints or flimsy mounting points.

Installation Procedure (General Guide)

While the specific steps may vary depending on the mirror type, here's a general outline of the installation process:

1. Preparation: Gather the necessary tools, including screwdrivers, wrenches, drill (if needed), wiring tools (if installing power mirrors), and safety glasses.
2. Removal of Old Mirror: Remove the interior door panel (if necessary) to access the mirror mounting bolts or screws. Disconnect the wiring harness for power mirrors. Carefully remove the old mirror from the door.
3. Test Fitment: Before permanently installing the new mirror, test fit it to ensure proper alignment and clearance. If drilling is required, mark the new mounting hole locations carefully.
4. Drilling (if necessary): Drill the new mounting holes, being careful not to damage the door panel or wiring. Use a drill bit size that matches the size of the mounting screws.
5. Wiring (for Power Mirrors): Connect the wiring harness for the new power mirror. Use proper wiring techniques, such as soldering and heat-shrinking, to ensure reliable connections.
6. Installation: Install the new mirror onto the door, securing it with the mounting bolts or screws. Tighten the fasteners to the appropriate torque specification.
7. Testing: Test the functionality of the new mirror, including the power mirror adjustments (if applicable). Make any necessary adjustments to ensure proper alignment and visibility.
8. Reassembly: Reinstall the interior door panel.

Safety First: Always disconnect the negative battery terminal before working on any electrical components of your car. Wear safety glasses to protect your eyes from debris during drilling or other tasks.

Example: Installing a universal "Bullet" style mirror

These mirrors are usually attached with a single bolt through the door skin, so the procedure will be dramatically different. The first step is to mark the area on the door where the mirror will be mounted. Usually this is on the triangular portion of the door near the window, since the metal is thicker and the mirror will be less prone to vibration. Then, you must drill a pilot hole and widen it according to the size of the bolt used to mount the mirror. It is advisable to use some sort of rust inhibitor on the bare metal to prevent corrosion. You can then run the bolt through the mirror base and into the hole you drilled, and tighten. Then check if the mirror has the proper range of motion to provide adequate visibility.

Conclusion

Choosing the right side mirrors for your 240SX is a balance between aesthetics, functionality, and budget. Whether you opt for OEM replacements or aftermarket upgrades, understanding the technical aspects and installation procedures will ensure a successful and satisfying outcome. Take your time, do your research, and prioritize safety throughout the process. A well-chosen and properly installed set of side mirrors can significantly enhance both the appearance and safety of your 240SX.