2023-2025 Acura Integra Quarter Panel: Why Base, A-Spec, and Type S Panels Don't Mix
This guide covers the critical differences between Integra trim level quarter panels and what to inspect on a used replacement before you buy.
- The quarter panels for Base and A-Spec trims are NOT interchangeable with the wider panels from the Type S model.
- Replacement is a major structural job that requires professional cutting, welding, and paint blending; it is not a bolt-on, DIY-friendly part.
- When buying a used panel, verify it is from the correct trim level and inspect it for prior repairs, rust, and ensure it has enough extra material for installation.
- Labor and paint costs for installation will significantly exceed the price of the panel itself.
Critical Compatibility Warning: Base/A-Spec vs. Type S
Warning: The single most important factor when purchasing a quarter panel for a 2023-2025 Acura Integra is the vehicle's trim level. The quarter panels for the Base and A-Spec models are NOT interchangeable with the Type S model.
The high-performance Integra Type S features wider, more pronounced fender flares to accommodate a wider track and larger wheels. The standard Base and A-Spec panels will not align with the body lines, bumper, or other components of a Type S, and vice-versa. Always verify the trim level of the donor vehicle before purchasing a used quarter panel.
Symptoms of Quarter Panel Failure
Failure of a quarter panel is almost always due to external factors, not mechanical breakdown. The symptoms are typically obvious:
- Collision Damage: Dents, deep scratches, creases, or buckling of the metal from an impact are the most common reasons for replacement. Severe damage can compromise the vehicle's structure, affect tire clearance, or create sharp edges.
- Corrosion or Rust: While less common on a new vehicle, rust can appear due to deep scratches that expose bare metal. On many Honda and Acura vehicles, a common area for future rust is the seam where the rear bumper cover meets the quarter panel, just ahead of the rear wheel. Trapped moisture and road salt can cause bubbling under the paint over time.
- Cosmetic Blemishes: Minor dings, paint chips, and scratches may not require a full panel replacement and can often be repaired by a body shop.
Buying a Used 2023-2025 Integra Quarter Panel
A used OEM quarter panel can be an excellent value, offering factory-grade steel and perfect fitment compared to often-problematic aftermarket parts. However, careful inspection is crucial. Since this part must be cut from a donor car, the quality of the salvage cut is as important as the condition of the panel itself.
Inspection Checklist:
- Confirm Trim Level: Re-verify it came from a Base or A-Spec model, not a Type S.
- Check for Hidden Repairs: Look at the panel from the back side. Check for any signs of previous bodywork, like grinder marks, mismatched seam sealer, or non-factory welds. Run a small magnet over the entire surface; a magnet will not stick to areas with thick plastic body filler (Bondo).
- Inspect for Rust: Thoroughly check the inner side of the panel, especially along the wheel arch lip and the lower section where it meets the rocker panel. Peel back any rubber trim if possible to look for hidden corrosion.
- Examine the Cut: The panel should be cut by the salvage yard with plenty of extra material around the edges. Body shops need this overlap to properly section the new panel in. A cut that is too close to the edge may render the panel useless. Discuss the required cut with your body shop beforehand.
- Look for Minor Damage: Check for small dents or dings that may not be obvious in photos. A straight panel with original paint is always the best starting point, even if it will be fully repainted.
Installation: A Job for Professionals
Difficulty: 5 out of 5. This is not a DIY project for the home mechanic. Replacement requires specialized tools and skills for cutting, welding, and professional paint finishing.
Replacing an Integra quarter panel is an invasive and labor-intensive process. A technician must:
- Remove the rear bumper, tail light, interior trim panels, and sometimes the rear glass.
- Carefully drill out spot welds and cut the damaged panel away from the car's unibody structure.
- Precisely fit the replacement panel, clamping it into place and verifying all gaps with the door, trunk, and bumper are correct.
- Weld the new panel onto the vehicle using specific techniques to avoid warping the metal.
- Grind the welds smooth, apply body filler as needed, and then use seam sealer to waterproof all joints to prevent future rust.
- Prime, sand, and paint the new panel, blending the new paint into the adjacent door and roof pillar for a perfect color match.
Because of this complexity, labor costs are significant and can often exceed the cost of the part itself.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $580 - $870 | Price from online Acura dealers. MSRP is on the higher end. |
| Used OEM | $700 - $1,300+ | Price varies based on condition and availability. May seem high but includes the specific cut needed by a body shop. |
| New Aftermarket | Not Available | Weld-in structural panels are rarely produced by the aftermarket for newer models due to complex stamping and fitment requirements. |
| Shop Labor & Materials | $1,500 - $3,500+ | Includes installation, body work, paint, and materials. Can be much higher if there is underlying structural damage. |
Known Issues, Recalls, and TSBs
While there are no recalls or Technical Service Bulletins (TSBs) specifically for the quarter panels of the 2023-2025 Acura Integra, the vehicle has been subject to several other safety campaigns. These do not affect the quarter panel itself but are important for owners to be aware of:
- NHTSA Recall 24V744000: Addresses a steering gearbox defect that can cause increased friction and steering effort.
- NHTSA Recall 24V859000 / 26V054000: Pertains to an improperly secured driver's seat cushion frame that may not restrain the driver properly in a crash.
- VSA Modulator Recall: A recall was issued for a valve in the Vehicle Stability Assist (VSA) modulator that could leak brake fluid, potentially causing unintended movement.
You can check if a specific vehicle is affected by these recalls by entering its VIN on the NHTSA website.
OEM Part Numbers
| Position | Part Number | Trim Level |
|---|---|---|
| Right / Passenger Side | 04636-3S5-A00ZZ | Base, A-Spec (Without Type S) |
| Left / Driver Side | 04646-3S5-A00ZZ | Base, A-Spec (Without Type S) |
Pro Tip: Before sending your car to the body shop, take detailed photos of the undamaged areas around the repair, such as the door gaps and trunk alignment. This gives you a baseline to compare against once the work is complete.
Frequently Asked Questions
Why can't I use a Type S quarter panel on my A-Spec Integra?
The Integra Type S has a wider body with flared fenders to cover its wider wheel track and more aggressive stance. The shape, curves, and dimensions of the quarter panel are physically different and will not align with the doors, bumper, or unibody of a Base or A-Spec model.
Can I install a quarter panel myself to save money?
It is strongly discouraged. Quarter panel replacement is a structural repair that requires cutting metal from the car's chassis and welding a new piece in. Improper installation can compromise the vehicle's structural integrity, lead to extensive rust, and result in poor fit and finish. This job should only be performed by a professional collision repair technician.
Does a used quarter panel need to be the same color as my car?
No. The replacement panel, whether new or used, will need to be fully prepped, primed, and painted by the body shop. They will then blend the new paint into the surrounding panels (like the door and roof) to ensure an invisible repair. Therefore, the original color of the used panel does not matter.
Is it better to repair or replace my damaged quarter panel?
This depends entirely on the severity of the damage. Minor to moderate dents and scratches can often be repaired by a skilled technician for less than the cost of replacement. However, if the panel is severely creased, torn, stretched, or has extensive rust, replacement is often the only option to restore the vehicle's structural integrity and appearance.
Technical Specifications
OEM Part Numbers: 04636-3S5-A00ZZ 04646-3S5-A00ZZ
Material: Stamped Steel. Installation: Weld-on.
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 Integra: