News

What the 96373-6CA9A Mirror Cap Is — and What It Fits

The 96373-6CA9A is the front right side mirror cap cover for the 2019–2020 Nissan Altima. If your cap cracked in a parking scrape, faded in the sun, or snapped a clip, this is the replacement. Order the Front Right Side Car Mirror Cap Cover (96373-6CA9A) direct from Koeep.

This is a passive cosmetic part: no electronics, no coding. The cap is molded to the OEM contour within a ±0.3mm tolerance band, so it stays integrated with the Intelligent Around View Monitor (IAVM) sensor housings Nissan deploys on its 2025–2026 platforms.

Koeep has re-validated the part against the 2026 aftermarket compliance benchmarks:

• SAE J576 for polymeric exterior components
• ISO 16750-4 for thermal cycling endurance
• NHTSA FMVSS 111 rear-visibility field-of-view requirements
• SAE J726:2026 supply-chain traceability — inventory aligned as of May 2026

96373-6CA9A Specification Sheet

Why ASA-GF20: The Material Behind the Fit

The cap uses an Acrylonitrile Styrene Acrylate (ASA) matrix reinforced with 20% glass fiber. ASA-GF20 is the 2025–2026 benchmark material for non-structural exterior trim across Toyota, Ford, and GM platforms — not just Nissan.

Glass fiber controls expansion. CLTE runs 45–55 μm/m·°C, nearly identical to the OEM cap's specification, so you get zero gap-creep across the full -40°C to +105°C operational range.

UV and color stability

Accelerated weathering per SAE J2527 (2026 revision, enhanced UV-B spectrum) holds ΔE color shift below 1.5 after 3,000 xenon-arc hours. In practice, the cap keeps color harmony with adjacent panels through the 2026–2030 service-life projection. A hindered amine light stabilizer (HALS) package meets Nissan's 10-year Florida-equivalent exposure benchmark.

Clip retention under thermal shock

The snap-fit clips are molded from hydrolysis-stabilized PA66-GF15 and sustain over 85 N of clamping force after 1,000 thermal-shock cycles from -40°C to +90°C per ISO 16750-4:2026. Commodity clips on unfilled nylon-6 measure 45–60 N after the same test.

Koeep vs. Commodity Aftermarket vs. Dealer OEM

Here is what the price gap buys. Commodity caps are unfilled ABS off legacy tooling at $12–$18. The dealer cap is OEM-spec ASA-GF20 at $78–$145. The Koeep cap runs $22–$38 with the same polymer class as the dealer part.

Bottom line: the dealer part wins narrowly on tolerance and retention but costs $78–$145. The commodity cap saves about $10 up front and typically needs replacing within 2–4 years.

DTC and BCM Notes for Installers

The 96373-6CA9A is DTC-neutral — no active electronics, so the cap cannot generate a code. The risk is mechanical: a badly seated cap can disturb the blind-spot monitoring (BSM) radar reflector or the side camera on 2024–2026 Altima mirror housings.

DTC ranges to know on 2019–2026 Altima (L34)

• U1000–U1300: CAN-bus faults between the BCM and door-zone modules. Verify connector seating at the mirror harness after the swap.
• B1155–B1165: Mirror heater circuit faults. Confirm element continuity before reinstalling the cap, if equipped.
• C1A00–C1A99: Camera/radar alignment codes on IAVM models. Recalibrate if the side-camera housing moves beyond 0.5° angular deviation.
• P0400–P0499: EGR range codes — unrelated, but often misdiagnosed when mirror vibration loosens engine-bay sensor connectors on 2.5L PR25DD engines.

Blind-spot monitoring and camera codes

The cap is radio-transparent to the 24 GHz and 77 GHz signals used by Nissan's 2024–2026 BSM systems. The failure mode is seating: a loose lower clip channel can shift the rearward edge by 1.5–2.0 mm and partially occlude the radar reflector window.

Nissan TSB NTB25-014 (revised January 2026) flags intermittent BSM codes C1A11–C1A15 when aftermarket caps go on with clip damage. Run a 360° walk-around test and verify both LED telltales before the car returns to service.

Worst-case codes from a bad install

Misalignment on IAVM-equipped cars can set C1A03 (Side Camera Misalignment — Right), U1232 (Lost Communication with Multi-Function Camera Module), or B1160 (Mirror Motor Position Sensor Correlation), usually within 3–5 ignition cycles.

Scan with a CONSULT-IV+ on 2026 firmware v6.2.1 or later, run the Around View Monitor Aiming routine, and clear stored camera offsets. Full DTC map: Nissan ESM Section MIR-32 (2026 revision).

Installation, Trims, and Paint

Tools and calibration

One toolset: trim-panel removal tools. No CAN-bus recalibration is needed, and the passive cap causes no signal interference with Nissan's V-CAN 3.0 architecture.

Heated and auto-dimming mirrors

The cap is structurally identical across heated and non-heated configurations — the heating element mounts to the mirror glass substrate and backplate, not the cosmetic cap.

On 2026 Altima SR and SL trims with auto-dimming electrochromatic glass, seat the dimming connector fully before snapping the cap on. Trapped wiring can push misalignment past 0.5 mm and trigger B1158 (Mirror Heater Circuit Range/Performance).

2026-compliant paint procedure

The cap ships in factory-grade primer formulated for direct topcoat. Work in this order:

• Topcoat with PPG Envirobase High Performance or Axalta Cromax Pro waterborne systems — both stay inside EPA 40 CFR Part 59 VOC limits (≤3.5 lbs/gal for basecoats).
• Apply one adhesion-promoter wipe (3M 06396 or equivalent) only if the cap was stored beyond 12 months post-manufacture.
• Flash off 10 minutes at 22°C ambient.
• Clearcoat with PPG EC520 (2K urethane, 2026 HAPs-compliant).
• Bake 30 minutes at 60°C — never above 70°C. ASA-GF20 hits glass-transition onset near 108°C, and prolonged heat above 75°C can micro-warp the upper clip anchor points.

Cross-Reference Numbers and Matching Parts

Match a number before you order. The factory part number 96373-6CA9A cross-references with Nissan OEM SKU 96373-6CA0A and aftermarket interchange codes NI1320234 and AM-385612760. Koeep carries it as the Front Right Side Car Mirror Cap Cover, Fits 19-20 Nissan Altima.

Want to skip the paint booth? Koeep also stocks a white-color right-side mirror cap cover and a white-color left-side mirror cap cover for the same 19–20 Altima fitment.

For the wider catalog, browse the Body Parts collection at Koeep. Working on the fog lights of the same car? The complete guide to the Nissan Altima fog light assembly 26155-6CA0A covers installation, benefits, and maintenance.

Lifecycle: shelf life is 36 months factory-sealed at 15–30°C, ≤60% RH. Demand stays in the sustainment phase through 2026–2030 as the L34 Altima fleet moves from insurance collision cycles to secondary-owner maintenance — a high-turnover SKU through the L34's 2030 model-year sunset.

FAQ: 96373-6CA9A Troubleshooting and Fitment