AUDI 650.AU1M18 Rear Body Wire Harness

( Model: A4-AUDI ), ( Part Type: Wire Harness ), ( Conditions Options: Rear Bumper Parking Sensor Harness ), ( Genuine Oem: Yes ), ( Ipn: 650.au1m18 ), ( Warranty: 1 Year )

Review AUDI Rear Body Wire Harness Oem fits A4 650 2018

The **Audi 650 AU1M18 Rear Body Wire Harness (2018 A4)** is a high-quality, factory-original replacement component designed to ensure seamless electrical connectivity and optimal functionality for the rear body control module and associated systems in the 2018 Audi A4. This meticulously engineered harness is crafted to maintain the precise wiring layout and routing required for the rear body electronics, including the rear door locks, liftgate release, rear window defogger, and other critical control circuits. Built with durable, corrosion-resistant materials, this harness is engineered to withstand the demanding conditions of daily driving, providing reliable performance even in harsh environments. The wiring is meticulously organized with color-coded connectors and terminal points, ensuring easy installation and compatibility with the vehicle s existing electrical system. Whether replacing a damaged or worn-out harness or upgrading for enhanced reliability, this genuine Audi part guarantees a perfect fit and seamless integration with the rear body control module, ensuring all electrical functions operate with precision and efficiency. Ideal for professional installers and DIY enthusiasts alike, this harness is a testament to Audi s commitment to quality and performance, delivering a dependable solution for maintaining the integrity of your vehicle s rear body electronics.

### **Pros and Cons of buying a Audi 650 AU1M18 Rear Body Wire Harness (2018 A4)**

1. **Compatibility and Fitment** The harness is specifically designed for the 2018 Audi A4 (AU1M18 platform), ensuring a proper fit without modification. This reduces the risk of electrical issues caused by improper wiring.

2. **Quality and Reliability** Audi s wiring harnesses are built to meet strict automotive standards, offering durable materials and proper insulation. A genuine or high-quality aftermarket harness should provide long-term reliability.

3. **Prevents Electrical Problems** A faulty or damaged rear body harness can cause issues like malfunctioning rear lights, sensors, or even electrical shorts. Replacing it proactively can prevent costly repairs down the line.

4. **Improves Safety and Functionality** The rear harness controls critical components such as brake lights, turn signals, rear sensors (if equipped), and sometimes the rear spoiler or liftgate motor. A working harness ensures all these systems operate correctly.

5. **Easier Installation (If Genuine or Well-Sourced)** Some aftermarket harnesses come with clear wiring diagrams or installation guides, making the replacement process smoother for those with basic electrical knowledge.

6. **Prevents Future Corrosion or Wear** Over time, wiring can degrade due to exposure to moisture, heat, or vibration. Replacing it early can avoid progressive failure in the harness.

7. **Potential Resale Value** If you plan to sell the car later, having a fully functional harness can make the vehicle more appealing to buyers concerned about electrical reliability.

1. **Cost** A genuine Audi harness can be expensive, often costing between **$300 $600 **, depending on the source (dealer vs. aftermarket). Aftermarket options may be cheaper but could vary in quality.

2. **Installation Complexity** The rear body harness is part of the car s electrical system, and improper installation can lead to short circuits, fused connections, or even damage to other components. If you re not experienced with automotive wiring, professional installation is recommended.

3. **Potential for Counterfeit Parts** If purchasing from an unknown seller, there s a risk of receiving a low-quality or fake harness that doesn t meet Audi s specifications, leading to premature failure.

4. **Time-Consuming Replacement** The process involves disconnecting the rear body control module (RBCM), removing the old harness, and carefully routing the new one. This can take **2 4 hours** for a DIYer, depending on access and tools.

5. **Additional Components May Be Needed** In some cases, the replacement may require new connectors, crimp tools, or even a new RBCM if it s damaged. These extras can add to the cost.

6. **Warranty Concerns** If the car is still under warranty, replacing the harness with an aftermarket part may void certain coverage, depending on the manufacturer s policies.

7. **Not Always the Root Cause** If the issue is intermittent (e.g., lights flickering), the problem might not be the harness itself but rather a faulty connection, sensor, or ground. A thorough diagnosis is needed before replacement.

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### **Conclusion**

Buying and replacing the **Audi 650 AU1M18 rear body wire harness (2018 A4)** is a **necessary repair** if the harness is confirmed faulty, as it prevents a cascade of electrical failures. The decision to proceed depends on the severity of the symptoms (e.g., non-functional rear lights, sensor errors) and whether the harness is the confirmed cause.

If the harness is **genuine or from a reputable aftermarket supplier**, the benefits (reliability, safety, functionality) outweigh the costs. However, if the issue is minor or the harness is only suspected to be faulty, further diagnostics (e.g., checking connections, testing the RBCM) may be warranted before committing to a replacement.

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### **Recommendation**

1. **Confirm the Issue** Before purchasing, verify that the harness is indeed the problem. Use an **OBD-II scanner** to check for error codes related to rear lighting, sensors, or the RBCM. A mechanic can also perform a **visual inspection** of the harness for burns, fraying, or loose connections.

2. **Choose the Right Harness**

- **Genuine Audi Part** (e.g., from Audi, Audi Specialty Equipment, or a trusted dealer) ensures compatibility but is expensive.

- **High-Quality Aftermarket** (e.g., **Audi Parts Shop, Euro Car Parts, or reputable online sellers**) offers a cost-effective alternative if sourced carefully.

- Avoid **cheap eBay or Amazon listings** unless the seller has verified reviews and return policies.

3. **Professional Installation** If you lack experience with automotive wiring, have a **qualified electrician or Audi specialist** perform the replacement. This ensures proper crimping, routing, and testing to avoid future issues.

4. **Consider a Full System Check** If replacing the harness, take the opportunity to inspect other related components (e.g., RBCM, fuses, ground connections) for potential failures.

5. **Budget for Extras** Account for additional costs like **new connectors, crimp tools, or a new RBCM** if needed. Some harnesses may require **reprogramming** after installation, which may incur extra fees.

6. **Document the Work** Keep records of the replacement, including **photos, receipts, and any error codes cleared** after the fix. This helps with future diagnostics or warranty claims.

If the harness is **confirmed bad and the issue is critical**, replacing it is a **wise investment** to restore proper function and prevent further damage. However, **only proceed after thorough diagnosis** and with the right part and installation method to ensure long-term reliability. If unsure, consult an Audi specialist before purchasing.

Details:

Very happy customer, excellent value and service. Quality, Assured Parts All are Quality Tested Inspected. Please disregard other fitment charts they may not be correct. Free shipping only applies to items you keep.

Please compare part numbers BEFORE purchasing. Easy to find parts that don't require a mechanics knowledge. Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold. Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver.

Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. More Parts: 1 Year Warranty. Model: A4 AUDI. If something is wrong with an order, we certainly do want to help you.

REAR BODY WIRE HARNESS OEM 2018 A4 AUDI: BUMPER PARKING SENSOR Included: Hassle-free 1 Year Warranty Our Part #: 9688610.

specifications tusilap:

• for models: A4, 650
• for makes: Audi
• for years: 2018
• model: A4-audi
• part type: Wire Harness
• conditions options: Rear Bumper Parking Sensor Harness
• genuine oem: Yes
• ipn: 650.au1m18
• warranty: 1 Year

payments tusilap:

• other
• wallet: Google-pay
• credit card: Discover

returns tusilap:

• paid by: Buyer
• time: 60 Days
• policy: Returns Accepted

offer tusilap:

• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: February 19, 2026
• best offers: True

general tusilap:

• Commercial Truck Parts > Lighting > Wiring Fuses
• condition: Used

shipping tusilap:

• type: Fixed
• class: Freight
• cost: $35.00
• service: Flat Rate Freight

seller tusilap:

• # reviews: 22972
• city: Rancho Cordova, California
• rating: 97.1%

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