1. Mirrors Exterior For Sale
  2. sku: 17681887651979623
  3. LEXUS 87931-78040

LEXUS / GENUINE / FACTORY OEM 87931-78040 Right Auto Dim Mirror Glass Blind Spot Alert

fits model: Nx200t, Nx300, Nx300h. make: Lexus. year: 2015–2021.

87931-78040 Lexus / Genuine Factory Oem Right Auto Dim Mirror Glass Blind Spot Alert 15-21 Nx200t Nx300 Nx300h

( Brand: Lexus / Genuine / Factory Oem ), ( Manufacturer Part Number: 87931-78040 ), ( Part Type: Mirror ), ( Non-domestic Product: No ), ( Fitment Type: Direct Replacement ), ( Placement On Vehicle: Front, Right ), ( Features: Automatic Dimming ), ( Attachment Method: Clip-on ), ( Country Of Origin: United States )

Review LEXUS / GENUINE FACTORY OEM Right Auto Dim Mirror Glass Blind Spot Alert fits NX200T NX300 NX300H 2015–2021

The **Lexus 87931-78040 Right Auto-Dimming Mirror with Blind Spot Alert** is a precision-engineered automotive accessory designed exclusively for Lexus models, including the **NX200t, NX300, and NX300h** (2015 2021 generations). This high-performance mirror assembly combines cutting-edge technology with sleek, aerodynamic styling to enhance both safety and convenience for the driver. The **auto-dimming feature** automatically adjusts the mirror s reflectivity in response to approaching headlights, reducing glare from oncoming traffic while maintaining optimal visibility during nighttime or low-light conditions. This intelligent system employs advanced photoresistors and a seamless motorized mechanism to ensure smooth, silent operation without the need for manual intervention, thereby reducing driver fatigue and improving overall driving comfort.

Beyond its adaptive dimming capabilities, this mirror integrates **Blind Spot Alert (BSA)**, a sophisticated sensor-based system that enhances rear visibility by detecting vehicles in the driver s blind spot. When a vehicle is detected, the mirror s indicator light typically embedded in the mirror s housing activates, providing a clear visual cue to the driver. This feature is particularly valuable during lane changes or highway merges, where awareness of surrounding traffic is critical. The **BSA sensors** are strategically positioned to minimize false triggers while maximizing reliability, ensuring that the system remains responsive in various driving scenarios, from urban commutes to highway travel.

Constructed from **high-grade, corrosion-resistant materials**, this mirror is built to withstand the rigors of daily use, including exposure to harsh weather conditions, road debris, and temperature fluctuations. The **black-tinted glass** not only complements the Lexus aesthetic but also helps reduce internal heat buildup, contributing to a more comfortable cabin environment. The mirror s **streamlined design** aligns seamlessly with the NX series modern, sporty silhouette, ensuring a cohesive and premium appearance. Installation is straightforward, with the **universal fitment** accommodating the specific mounting points of the 2015 2021 NX models, though professional installation is recommended to ensure optimal performance and alignment.

For drivers who prioritize both safety and sophistication, this **Lexus 87931-78040 Right Auto-Dimming Mirror with Blind Spot Alert** represents a seamless blend of innovation and luxury. Whether navigating city streets or cruising on the highway, this accessory provides an added layer of confidence, ensuring that no blind spot goes unnoticed while maintaining the refined driving experience that Lexus owners expect. With its **reliable electronics, durable construction, and intuitive features**, it stands as an essential upgrade for those seeking to elevate their NX s functionality without compromising style.

### **Pros and Cons of buying a Lexus 87931-78040 Right Auto-Dim Mirror with Blind Spot Alert (2015 2021, Fits: NX200T, NX300, NX300H)**

#### **Pros:**

1. **Enhanced Safety Features** The blind spot alert system helps prevent collisions by detecting vehicles in your blind spots, reducing the risk of accidents during lane changes. This is particularly useful for drivers who frequently merge or switch lanes.

2. **Auto-Dimming Functionality** The mirror adjusts its brightness based on ambient light conditions, improving visibility in both daylight and low-light situations. This reduces eye strain and improves overall driving comfort.

3. **Compatibility with Multiple Lexus Models** This part fits several Lexus NX models (NX200T, NX300, NX300H) from 2015 to 2021, making it a versatile aftermarket or replacement option for owners of these vehicles.

4. **Potential Cost Savings** If the original mirror was damaged or malfunctioning, replacing it with this unit could be more affordable than purchasing a full mirror assembly from a dealership, especially if the rest of the mirror is still in good condition.

5. **Improved Driving Experience** The combination of blind spot detection and auto-dimming mirrors can make driving smoother and more confident, especially in heavy traffic or on highways.

6. **Easy Installation (If DIY-Friendly)** Depending on the model, some owners report that replacing just the mirror assembly (rather than the entire mirror) can be a straightforward DIY job, though professional installation may still be recommended for optimal performance.

7. **Lexus Brand Reliability** Lexus parts are generally known for durability and compatibility with the vehicle s systems, reducing the risk of compatibility issues or premature failure.

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#### **Cons:**

1. **Potential Compatibility Issues** While this part is designed to fit multiple models, there is always a risk of slight fitment issues depending on the exact year, trim, or modifications to the vehicle. A thorough inspection or professional installation may be necessary to ensure proper alignment and functionality.

2. **Cost Compared to Full Mirror Replacement** If the mirror housing or mounting mechanism is damaged, replacing just the glass assembly may not fully resolve the issue. In some cases, a full mirror replacement could be more cost-effective if other components are worn out.

3. **Aftermarket vs. OEM Quality** If this part is sourced from a third-party seller (rather than a Lexus-approved dealer), there is a chance of lower-quality materials or inconsistent performance. Always verify the seller s reputation and return policies.

4. **Blind Spot Alert Reliability** While the blind spot alert system is a useful feature, its effectiveness depends on proper sensor calibration and the vehicle s overall condition. If the sensors are dirty or misaligned, the system may not work as intended.

5. **Limited Availability of Original Parts** If this is an OEM or high-quality aftermarket part, it may not be as readily available as generic replacements, potentially leading to longer wait times for delivery.

6. **Potential for Counterfeit Parts** Purchasing from untrusted sellers increases the risk of receiving counterfeit or substandard parts. Always check for authenticity, especially if buying online from unknown vendors.

7. **Installation Complexity** Some Lexus models may require disassembling parts of the mirror assembly or recalibrating sensors after installation. Improper installation could lead to malfunctions or void warranties.

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### **Conclusion:**

The **Lexus 87931-78040 Right Auto-Dim Mirror with Blind Spot Alert** is a valuable upgrade or replacement part for owners of the specified NX models. Its primary advantages lie in **enhanced safety, convenience, and compatibility**, making it a practical choice for those looking to improve their driving experience or repair a damaged mirror. However, potential buyers should be cautious of **fitment issues, quality inconsistencies, and installation challenges**, particularly if purchasing from non-OEM sources.

For the best results, **verify compatibility with your exact vehicle model and year**, consider purchasing from a reputable seller (preferably Lexus-approved or highly rated aftermarket suppliers), and ensure professional installation if you are unsure about the process. If the mirror housing or other components are damaged, a full mirror replacement may be more appropriate.

### **Recommendation:**

- **Buy from a trusted source** (Lexus dealership, authorized parts supplier, or well-reviewed aftermarket seller) to ensure authenticity and quality.

- **Check compatibility** with your specific NX model and year to avoid fitment issues.

- **Consider professional installation** if you are not experienced with vehicle repairs, especially to ensure proper calibration of the blind spot alert system.

- **Inspect the mirror assembly** before purchasing to confirm that only the glass and sensors need replacement, or if additional parts (like the housing) are required.

- **Test the system after installation** to confirm that the auto-dimming and blind spot alert functions work correctly.

If the part is genuine and installed properly, it will significantly improve safety and driving comfort for your Lexus NX. However, weigh the cost against the potential benefits, especially if the mirror housing or other components are beyond repair.

Details:

USED Mirror Glass in Great Condition, Features: Auto Dimming, Heated, Blind Spot Alert, This is a factory original part. Direct fit replacement. 2021 Lexus NX300h Base, F Sport Black Line, Luxury. 2019 Lexus NX300h Base.

2020 Lexus NX300h Base, Luxury. 2018 Lexus NX300h Base.

part #: 8793178040 prices

  • $29.99-$59.00

specifications mirroexter:

  • for models: Nx200t, Nx300, Nx300h
  • for makes: Lexus
  • for years: 2015-2021
  • brand: Lexus / Genuine / Factory Oem
  • mpn: 87931-78040
  • part type: Mirror
  • non-domestic product: No
  • fitment type: Direct Replacement
  • placement on vehicle: Front, Right
  • features: Automatic Dimming
  • attachment method: Clip-on
  • country of origin: United States

offer mirroexter:

  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • started: January 31, 2026
  • quantity: 1
  • sold: 0

seller mirroexter:

  • city: Traverse City, Michigan
  • # reviews: 6498
  • rating: 100.0%

returns mirroexter:

  • time: 14 Days
  • policy: Returns Accepted
  • paid by: Buyer

shipping mirroexter:

  • class: Standard
  • transit: 4-9 Days
  • cost: $0.00
  • type: Fixed
  • service: Standard

general mirroexter:

  • condition: Used
  • Exterior Parts Accessories > Side View Mirrors > Mirror Assemblies

payments mirroexter:

  • credit card: Visa
  • other
  • wallet: Apple-pay
for models: nx200t, nx300, nx300h, for makes: lexus, for years: 2015-2021, part type: mirror, non-domestic product: no, fitment type: direct replacement, placement on vehicle: front, right, features: automatic dimming, attachment method: clip-on, country of origin: united states,
category: auto parts > exterior parts accessories > side view mirrors > mirror assemblies, sku: 17681887651979623,
Lexus / Genuine / Factory Oem 87931-78040 Is Similar To:
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5 offers $29.99–$59.00 USD
  • Used. Offer #1 priced at $29.99 + $11.35 shipping estimate = $41.34* total. +$11.35 shipping
  • Used. Offer #2 priced at $49.00 + $25.00 shipping estimate = $74.00* total. COMPATIBILITY (Right / Passenger Side). Models: Lexus NX200t / NX300 / NX300h.+$25.00 shipping
  • Used. Offer #3 priced at $59.00 + $19.00 shipping estimate = $78.00* total. 100% OEM original. Auto Dim: Yes.+$19.00 shipping
  • Used. Offer #4 priced at $249.00 + $19.00 shipping estimate = $268.00* total. It is 100% fully functional as tested by our expert technicians. Vehicle Model: NX RX 2015 - 2023.+$19.00 shipping
  • New. Offer #5 priced at $244.61 + $0.00 shipping estimate = $244.61* total. Aftermarket Autopart Replacement.FREE SHIPPING

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