2014-2017 Acura RLX Quarter Panel: BSI, Hybrids, and Weld-On Replacement Guide
This guide covers the critical compatibility checks for Blind Spot Information (BSI), trim packages, and the structural challenges of replacing a quarter panel on the 2014-2017 Acura RLX.
- This is a professional, weld-on structural repair; it is not a DIY-friendly bolt-on part.
- Compatibility is complex. You must verify if the vehicle has Blind Spot Information (BSI), and which trim/powertrain it has (Hybrid, Krell audio) to get the correct inner and outer panels.
- The part only fits 2014-2017 Acura RLX models. Panels from the redesigned 2018+ models are not compatible.
- Using a salvaged (used) quarter panel has safety implications that must be discussed with your body shop to ensure they can follow OEM-approved welding procedures.
Symptoms of a Damaged Quarter Panel
Since the quarter panel is a static body component, "failure" is always the result of physical damage or corrosion. Symptoms are typically obvious and visual.
- Visible Body Damage: This includes dents, dings, deep scratches, and creases from impacts. Minor cosmetic damage may not affect vehicle function, but severe damage can compromise structural integrity.
- Rust and Corrosion: Look for bubbling paint or visible rust, especially around the wheel arch, along the bottom edge near the side skirt, and at any seams. Surface rust can often be repaired, but rust that has perforated the metal requires panel replacement.
- Poor Alignment of Adjacent Parts: If a collision has deformed the quarter panel, you may notice that the trunk lid, rear door, or bumper cover no longer aligns correctly. This indicates a structural shift that needs professional assessment.
- Blind Spot Information (BSI) System Warnings: An impact to the rear corner can damage or misalign the BSI radar sensor mounted behind the panel. This will typically trigger a warning message on the dashboard and disable the system.
Variant and Compatibility Differences (2014-2017)
Verifying the correct quarter panel assembly for a 2014-2017 RLX is complex. The 2018 model year introduced a major body redesign, so panels from 2018-2020 models will not fit. For the correct 2014-2017 generation, you must verify several options on the vehicle.
Blind Spot Information (BSI) System
The most critical variation is whether the vehicle is equipped with the Blind Spot Information (BSI) system. Panels for BSI-equipped cars have specific mounting brackets for the radar sensors. A panel without these brackets cannot be used on a BSI-equipped car without extensive modification. You can identify a BSI-equipped car by looking for an indicator light on the inside of the front A-pillars or on the side mirrors.
Inner vs. Outer Panels and Trim Packages
The full quarter panel is an assembly of inner and outer structures. These can vary based on the vehicle's trim and powertrain.
- Hybrid vs. Non-Hybrid: The RLX Sport Hybrid and standard front-wheel-drive models may have different inner structural panels to accommodate hybrid system components.
- Trim and Audio Systems: High-end trims with the Krell premium audio system or the Advance Package may have different inner panel configurations or mounting points.
- Wheel Size: Part descriptions often mention 18-inch or 19-inch wheels. This is typically an indicator of the trim level (e.g., Tech vs. Advance) and helps differentiate which panel is needed.
Pro Tip: The only way to guarantee compatibility is to match the part number from the existing panel or have a dealership run the vehicle's VIN to determine the exact part required.
Buying a Used 2014-2017 RLX Quarter Panel
A used OEM quarter panel can be a cost-effective option, as it ensures factory-grade steel and proper contours. However, because this is a structural, weld-on part, inspection is critical.
Physical Inspection Checklist
- Check for Previous Repairs: Look for signs of body filler (Bondo), sanding marks, or an inconsistent finish on the back side of the panel. A magnet should stick firmly to all areas; if it doesn't, filler is likely present.
- Inspect for Hidden Rust: Carefully check the seams, wheel arch lip, and lower edges for any signs of corrosion that may have been painted over.
- Verify All Brackets are Intact: For BSI-equipped cars, ensure the radar sensor mounting brackets are present and undamaged. Check all other mounting tabs and points for the bumper and tail light.
- Examine the Cut: A used quarter panel will be cut from a donor vehicle. Inspect the cut areas. A panel with more of the surrounding structure attached gives the body shop more material to work with, but may increase shipping costs.
Warning: Many professional collision repair organizations advise against using salvaged weld-on panels. This is because the original spot welds must be drilled out, and installing a used panel often requires creating larger welds than the factory specifies, which can alter crash performance. Always discuss the use of a recycled quarter panel with your chosen body shop to ensure they are comfortable with the installation and can follow OEM-approved procedures.
Replacement and Installation
Professional Installation Required: This is not a DIY project. The quarter panel is a structural component of the vehicle that is welded to the unibody chassis.
Replacement requires specialized tools and expertise found only in a professional auto body shop.
- Difficulty: 5 out of 5
- Process: The technician must first remove the rear glass, bumper, tail light, and interior trim. The damaged panel is then removed by drilling out dozens of factory spot welds and cutting through specific structural points. The new or used panel is carefully fitted, clamped, and welded into place using a combination of spot welds and MIG welds. Finally, the welds are ground down, seams are sealed, and the entire panel is prepped, primed, and painted to match the vehicle.
- Labor Time: The labor for a single quarter panel replacement can easily exceed 20-40 hours, not including painting.
Known Issues, TSBs, and Recalls
While there are no recalls or Technical Service Bulletins (TSBs) specifically for the quarter panels on the 2014-2017 Acura RLX, several vehicle-wide issues are worth noting:
- Recall for Fuel Pump Failure (NHTSA 23V-858): A widespread recall affecting many Honda/Acura models, including the RLX, involves a fuel pump that can fail and cause the engine to stall.
- Recall for Unexpected Braking (NHTSA 15V-301): The Collision Mitigation Braking System (CMBS) could misinterpret roadside objects and apply the brakes unexpectedly. A software update resolves this.
- Recall for Headlight Delamination (NHTSA 14V-792): The reflective film inside the headlights could peel, reducing light output.
Cost Comparison
Replacing a quarter panel is a labor-intensive job, and labor is the largest part of the total cost.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Outer Panel | $650 - $750 |
| New OEM Inner Panel Assembly | $1,200 - $1,800 |
| Used OEM Assembly (Salvage) | $400 - $1,000+ (Varies widely) |
| New Aftermarket | Not commonly available |
| Shop Labor & Paint | $2,000 - $5,000+ |
OEM Part Numbers
The following are some of the primary part numbers for the 2014-2017 Acura RLX. Superseded numbers are common. Always verify with a VIN.
| Component | Part Number | Notes |
|---|---|---|
| Right (Passenger) Outer Panel | 04636-TY2-A00ZZ / 04636-TY2-A10ZZ | Often specified for models with BSI and 19" wheels. |
| Left (Driver) Outer Panel | 04646-TY2-A00ZZ | |
| Right (Passenger) Inner Assembly | 64300-TY2-335ZZ | Supersedes 64300-TY2-305ZZ. Variations exist for trim/options. |
| Left (Driver) Inner Assembly | 64700-TY2-325ZZ | Supersedes 64700-TY2-305ZZ / -315ZZ. Variations for Hybrid, Krell audio, etc. |
| Right (Passenger) Wheel Arch Extension | 64320-TY2-305ZZ | |
| Left (Driver) Wheel Arch Extension | 64720-TY2-305ZZ |
Frequently Asked Questions (FAQ)
Can I replace an RLX quarter panel myself?
No. This is a structural, weld-on panel. Replacement requires specialized welding equipment, cutting tools, and bodywork expertise to ensure the vehicle's structural integrity and safety are maintained. This job should only be performed by a professional collision repair facility.
How do I know if my RLX has the Blind Spot Information (BSI) system?
Look for the BSI indicator lights. They are typically located on the interior side of the A-pillars (the pillars on either side of the windshield) or within the glass of the side mirrors themselves. When you start the car, these indicators should briefly illuminate.
Is a used OEM quarter panel better than a new aftermarket one?
For a structural part like this, new aftermarket options are rare and generally not recommended due to potential issues with fit, metal quality, and safety compliance. A used OEM panel guarantees the correct material and shape, but its use in a structural repair should be discussed with your body shop due to the complexities of re-welding a salvaged panel.
Why is the replacement cost so high if the part is only a few hundred dollars?
The high cost is due to the extensive labor involved. A technician must disassemble a large portion of the car's rear, drill out dozens of welds, precisely fit and weld the new panel, and then perform multi-stage paint work to match the factory finish. The process can take several days.
Technical Specifications
OEM Part Numbers: 04636-TY2-A00ZZ 04636-TY2-A10ZZ 04646-TY2-A00ZZ 64300-TY2-305ZZ 64300-TY2-335ZZ 64700-TY2-305ZZ 64700-TY2-315ZZ 64700-TY2-325ZZ 64320-TY2-305ZZ 64720-TY2-305ZZ
Material: Stamped Steel. Installation Method: Spot and MIG welding.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Acura RLX:
- Symptoms of a Damaged Quarter Panel
- Variant and Compatibility Differences (2014-2017)
- Blind Spot Information (BSI) System
- Inner vs. Outer Panels and Trim Packages
- Buying a Used 2014-2017 RLX Quarter Panel
- Physical Inspection Checklist
- Replacement and Installation
- Known Issues, TSBs, and Recalls
- Cost Comparison
- OEM Part Numbers
- Frequently Asked Questions (FAQ)
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