SUBARU 81817FL300 Crosstrek Rear Trunk Lid Wiring Harness Left 5J16

( Manufacturer Part Number: 81817FL300 ), ( Type: Trunk Lid ), ( Placement On Vehicle: Left )

Review SUBARU Oem Crosstrek Rear Trunk Lid Wiring Harness Left Side #5j16 fits 2018–2023

The **81817FL300 (2018 2023 Subaru Crosstrek Rear Trunk Lid Wiring Harness Left Side, Part Code 5J16)** is a precision-engineered electrical component designed exclusively for Subaru s compact crossover, ensuring seamless integration with the vehicle s trunk lid mechanism. This high-quality wiring harness is meticulously crafted to accommodate the left-side trunk lid functions, including the motorized lift mechanism, safety sensors, and power distribution for the integrated LED lighting system. Constructed from durable, automotive-grade materials, the harness features a robust, tinned copper wiring configuration that resists corrosion, oxidation, and environmental wear, guaranteeing long-term reliability even in harsh driving conditions. The wiring is neatly organized within a reinforced, heat-resistant sleeve, protecting it from abrasion, moisture, and mechanical stress while maintaining optimal signal integrity for the trunk lid s electronic controls. This harness is engineered to interface directly with the vehicle s body control module (BCM) and trunk lid motor, providing a clean, interference-free connection that eliminates common issues like intermittent power loss, sensor malfunctions, or erratic lid operation. Whether replacing a damaged original equipment (OEM) harness or upgrading an aftermarket trunk lid system, this part ensures compatibility with Subaru s 2018 through 2023 Crosstrek models, including those equipped with optional features like the panoramic moonroof or advanced driver-assistance systems (ADAS). Its precise pinout and connector design aligns flawlessly with the factory wiring layout, reducing installation complexity and minimizing the risk of electrical shorts or improper grounding. Ideal for professional automotive technicians and DIY enthusiasts alike, this wiring harness is a critical component for restoring or enhancing the functionality of a Subaru Crosstrek s trunk lid system, delivering the performance and durability expected from Subaru s reputation for rugged, dependable engineering.

### **Pros and Cons of buying a 81817FL300 (2018 2023 Subaru Crosstrek Rear Trunk Lid Wiring Harness Left Part 5J16)**

1. **Direct OEM Replacement** This part is manufactured to match the original equipment specifications of the Subaru Crosstrek, ensuring a perfect fit and reliable performance. It uses the same connectors, wiring, and mounting points as the factory harness, reducing the risk of compatibility issues.

2. **High Quality and Durability** Subaru s OEM parts are known for their robustness, especially in wiring harnesses, which are designed to withstand environmental factors like moisture, vibration, and temperature fluctuations. This minimizes the risk of electrical failures or short circuits over time.

3. **Warranty Coverage** Purchasing from an authorized Subaru dealer or a reputable aftermarket supplier often includes a warranty (typically 1 3 years), providing peace of mind against defects or premature failure.

4. **Prevents Future Issues** A faulty trunk lid wiring harness can cause intermittent electrical problems, such as the trunk not locking/unlocking properly, the rear power liftgate failing, or even triggering the check engine light. Replacing it proactively can prevent these inconveniences.

5. **Professional Installation Compatibility** Since this is an OEM part, mechanics and dealerships are familiar with its installation process, making repairs faster and more reliable. It also reduces the need for custom modifications or adapters.

6. **Resale Value Protection** Keeping your Crosstrek stock with genuine parts helps maintain its value, especially if you plan to sell it in the future. Potential buyers prefer vehicles with original or high-quality aftermarket components.

7. **Consistency with Other Systems** The wiring in the trunk lid harness may interface with the vehicle s body control module (BCM) or other electrical systems. Using an OEM part ensures seamless integration without signal conflicts.

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1. **Higher Cost** OEM parts are significantly more expensive than generic aftermarket alternatives. The 81817FL300 is priced higher than non-branded wiring harnesses, which can be a financial drawback for budget-conscious buyers.

2. **Limited Availability Outside Dealerships** While widely available at Subaru dealerships, finding this part from third-party suppliers may require extra effort. Some online marketplaces or specialty auto parts stores might not stock it, leading to delays.

3. **Potential Overkill for Minor Issues** If the wiring harness failure is isolated (e.g., a single broken wire rather than a complete harness failure), replacing the entire unit may be unnecessary. In such cases, a partial repair or aftermarket splice could be a more cost-effective solution.

4. **Installation Complexity** Replacing the trunk lid wiring harness requires disassembling parts of the trunk lid, potentially involving the release of the liftgate motor, sensors, or body panels. While not overly difficult, it does require mechanical skill and access to the right tools.

5. **Risk of Counterfeit Parts** Purchasing from untrusted sellers (especially online) increases the risk of receiving a counterfeit or low-quality part. Always verify the supplier s reputation and authenticity of the part number.

6. **Time-Consuming for DIYers** If you re not experienced with electrical wiring or Subaru-specific repairs, the installation process may take longer than expected. Improper handling could lead to further damage or electrical shorts.

7. **Environmental and Ethical Concerns** Some consumers prefer to avoid OEM parts due to environmental concerns (e.g., manufacturing processes, e-waste) or ethical objections to supporting dealership pricing models.

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### **Conclusion**

The **81817FL300 OEM wiring harness for the Subaru Crosstrek (2018 2023)** is a high-quality, reliable replacement that ensures long-term functionality and compatibility with your vehicle s electrical system. Its advantages in terms of fit, durability, and warranty coverage make it the best choice for those prioritizing performance and longevity. However, the higher cost and potential complexity of installation may deter budget-conscious or inexperienced DIYers.

For most owners experiencing trunk lid electrical issues such as failure to lock/unlock, liftgate malfunctions, or intermittent power this OEM part is the **recommended solution** to restore proper function and avoid recurring problems. If the issue is minor (e.g., a single wire failure), consulting a mechanic first to assess whether a partial repair is feasible could save money.

- **Buy from an authorized Subaru dealer or a trusted aftermarket supplier** (e.g., RockAuto, Amazon with verified sellers, or parts specialists like 5-Speed or AutoZone) to ensure authenticity and warranty coverage.

- **If comfortable with repairs**, proceed with installation carefully, following Subaru s service manual or a detailed YouTube guide (e.g., from channels like *ChrisFix* or *SubaruTech*).

- **For non-technical buyers**, visit a Subaru dealership or a reputable auto repair shop to have the part installed professionally.

- **Consider aftermarket alternatives** (e.g., *Dorman* or *Motorcraft*) only if the OEM part is unavailable or significantly overpriced, but verify compatibility first.

Ultimately, investing in the **OEM harness** is the safest and most future-proof option for maintaining your Crosstrek s reliability.

Details:

Removed from a 2020 Subaru Crosstrek Premium 2.0L 4 cylinder. Refer to the photos for items condition. Item is USED and has signs of wear.

part #: 81817fl300 prices

• $26.00-$95.00

specifications trunklipa:

• for makes: Subaru
• for years: 2018-2023
• mpn: 81817fl300
• type: Trunk Lid
• placement on vehicle: Left

shipping trunklipa:

• carrier: USPS
• service: USPS Ground Advantage
• transit: 5-9 Days
• cost: $11.00
• class: Standard
• type: Fixed

seller trunklipa:

• # reviews: 848
• rating: 99.1%
• city: Chariton, Iowa

offer trunklipa:

• availability: In Stock
• started: February 14, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0

payments trunklipa:

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

general trunklipa:

• Exterior Parts Accessories > doors, Trunk Lids Hatches > Hatches Trunk Lids
• condition: Used

returns trunklipa:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

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