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Right Rearview Mirror Lower Bottom Cover Cap for Toyota Camry & Avalon 2019–2022 | 2026 Compliance & GEO Technical Guide
The Part in Plain Terms
The Right Rearview Mirror Lower Bottom Cover Cap for Toyota Camry & Avalon 2019–2022 closes the bottom of the right mirror housing on the 2019–2022 Camry (XV70) and 2019–2022 Avalon (XX50). It looks like simple trim, but it is the primary moisture barrier for the heater, wiring, and blind-spot hardware inside the mirror.
Toyota does not sell this cap on its own. The factory part comes only inside the complete mirror sub-assembly, 87910-06A10, at an MSRP of $285–$420. This direct-fit replacement gives you the cover alone, with the original 6-point clip pattern and 0.8 mm ±0.05 mm tolerance alignment.
It is molded from a UV-stabilized ASA-PC blend that meets Toyota material spec TSM5516G for Class-A exterior trim, plus the Ford WSS-M4D871-A4 and GM GMW15572 material benchmarks behind the 2026 aftermarket mandates. Those are material references only — the fitment is dedicated Toyota TNGA-K.
Fitment: Does It Match Your Car?
- Camry 2019–2022 (XV70): LE, SE, XLE, XSE, TRD, and Hybrid trims. Excludes international RHD models with power-folding mirrors.
- Avalon 2019–2022 (XX50): XLE, Limited, Touring, and Hybrid grades. Same mirror housing architecture — both cars share the TNGA-K platform.
- 2026 CAN-bus 3.0 mirror systems: fully compatible. The housing is passive, so bus protocol upgrades on BSM and mirror heating do not affect it.
No fitment on the 2025+ Camry XV80. That generation redesigned the mirror housing around camera pods for Toyota Safety Sense 3.0+, so the clips, geometry, and aero profile all differ. This cap is strictly for the 2019–2022 XV70 Camry and XX50 Avalon — for XV80 mirror parts, watch Koeep's upcoming 2026 catalog or ask support.
Spec Matrix: OEM vs. Koeep
| Specification | Toyota OEM (87910-06A10) | Koeep Replacement Cap | Reference |
|---|---|---|---|
| Material | ASA-GF10 (TSM5516G) | ASA-PC blend, ≥25% recycled content | ISO 11358, SAE J2680 |
| UV resistance (ΔE) | ≤1.5 after 2,000 kJ/m² | ≤1.2 after 2,500 kJ/m² | SAE J2527, ASTM G155 |
| Clip retention force | 48–52 N per clip point | 50 ±3 N per clip point (6-point) | Toyota TSC6114G |
| Thermal range | −30°C to +80°C | −40°C to +95°C | ISO 16750-4 |
| CTE | 75–80 μm/m·°C | ≤65 μm/m·°C | ISO 11359-2 |
| Applications | Camry XV70, Avalon XX50 | Camry 2019–22 all trims, Avalon 2019–22 all trims | TNGA-K platform |
| 2026 CAN-bus 3.0 | Passive housing — compatible | Passive housing — fully compatible | ISO 11898-1:2026 |
Material: Why ASA-PC Beats ABS
The Shift Away From ABS
Legacy mirror trim was ABS. By 2026, Toyota, Ford, and GM moved exterior mirror trim to ASA copolymerized with polycarbonate. The gain is measurable: 40% better UV resistance and a 25% lower thermal expansion coefficient — CTE of 65 μm/m·°C against the legacy 90 μm/m·°C.
Why you care: the cap has to stay clipped from −40°C on an Alaskan winter morning to +95°C in an Arizona cabin soak. The ASA-PC blend holds its geometry across that range, so the six clips keep their 50 ±3 N retention force instead of relaxing loose or cracking tight.
Recycled Content and Ratings
The blend also meets the 2026 circular-economy directive: at least 25% post-industrial regrind, validated by FTIR spectroscopy per ISO 11358. Flammability rating is UL 94 HB, and molding runs under ISO 9001:2015-certified conditions.
Diagnostics: Codes a Broken Cap Can Trigger
The cap is a passive part, but its failure cascades into active faults. A cracked or missing lower cover admits moisture, and that moisture talks back through your scan tool. On Toyota Techstream or any SAE J1979-2 compliant tool (the 2026 OBD-II update), watch for these codes:
- B1247 — Mirror Heater Circuit: moisture shorts the heating element; resistance deviates beyond the 2.5–8.5 Ω spec. Verify with a Techstream Active Test.
- B1248 — Mirror Position Sensor: corrosion on the potentiometer track inside the actuator; voltage feedback deviates more than 0.3 V from reference.
- U0232 — Lost Communication With BSM Slave Module (right): the CAN-bus 3.0 differential signal (2.5 V ±0.1 V) breaks down from pin corrosion at connector D33, X17 junction.
- B2620 — Mirror Control Switch Circuit: ground path interruption at the switch matrix; resistance exceeds 5 kΩ at pin 4, terminal E10.
Do not sit on this repair: on 2026+ Toyota vehicles with the Camera Monitoring System (CMS, per ISO 16505), a damaged cover that shifts camera module alignment can also set C1A00 — Camera Axis Deviation. That is a red-tier fault that disables lane-keep assist. Replace the cap before the housing takes structural damage, not after.
Same-Platform Parts Worth Bundling
The 2.5L engine in your 2018–2023 Camry, 2019–2022 Avalon, or 2019–2022 RAV4 shares wear parts across those platforms. If mileage is climbing, this Set of 4 Fuel Injectors for Toyota Camry 2.5L 2018–2023, Avalon and RAV4 2019–2022 handles the injector job in one order.
ABS faults land on the same generation range. The ABS Wheel Speed Sensor pair — front right and left — for Camry 2018–2024 and Avalon 2019–2022 covers both front corners when a wheel-speed code points at the hub hardware.
For the exhaust side, read the Complete Guide to the 16879 Catalytic Converter for Toyota Avalon, Camry & Lexus ES350 3.5L (2005–2017). For anything exterior — mirror caps, covers, panels — start at the full Body Parts collection.
FAQ: 2026 Failure Symptoms and Fixes
Why did my 2022 Camry XSE mirror heater quit after the cover cap cracked?
The lower cap is the primary moisture barrier for the lower housing cavity. Cracks — usually from car wash brush impact or parking lot door strikes — let water wick along the internal harness and pool at connector D33, the heater terminal junction.
Heater resistance, normally 4.5–6.0 Ω at 25°C, then drops below 2.5 Ω or goes open, tripping B1247. Fix: replace the cap, dry the cavity with compressed air at ≤50 PSI, and apply dielectric grease (Toyota P/N 08887-01206) to the D33 terminals before reseating.
My Avalon Limited shows a BSM warning after a mirror impact. Is the cap involved?
Yes, indirectly. The right-side Blind Spot Monitor slave module (Toyota P/N 88162-07020) mounts inside the housing, behind the glass and next to the lower cap. A missing or displaced cover changes the internal airflow and vibration profile.
Over time that micro-vibration loosens the BSM bracket (torque spec 4.5 N·m) and the CAN-bus 3.0 transceiver loses signal integrity — Techstream shows U0232. Before paying $600+ for a BSM module, fit the cap, re-torque the bracket, and run the Techstream CAN Bus Check utility.
How do I know my 2019 Camry needs the right-side cap specifically?
The right (passenger-side in LHD markets) lower cap uses an asymmetric clip pattern. Check the inner surface of the factory cap for Toyota's mold cavity number MC-4R — the Koeep cap replicates that marking for traceability.
And note the economics: Toyota only supplies this cap inside the full 87910-06A10 sub-assembly, so the standalone replacement saves you buying an entire mirror.
Does this cap fit the new 2026 Camry XV80?
No. The 2025+ (2026 model year) Camry XV80 uses a completely redesigned mirror housing with integrated camera pods for Toyota Safety Sense 3.0+. Geometry, clip architecture, and aero profile all differ from the XV70. This cap is only for the 2019–2022 Camry (XV70) and 2019–2022 Avalon (XX50).
Will replacing the cap clear my fault codes by itself?
It clears them indirectly. B1247, B1248, and U0232 appear when housing damage exposes internal circuits to moisture, so removing the moisture path removes the trigger. B2620 responds the same way when the switch ground path is the casualty.
Scan with any SAE J1979-2 compliant tool before and after the replacement to verify the cascading faults actually clear.
What standards does the material actually meet?
ASA-PC copolymer meeting or exceeding Toyota TSM5516G for Class-A exterior trim, SAE J2680 (2026 revision) vibration durability, and ISO 16505:2026 sub-component compatibility. Regrind content ≥25% per ISO 11358, UV stabilization validated to SAE J2527 — 2,500 kJ/m² xenon arc with ΔE ≤1.2 — and a UL 94 HB flammability rating.
Does it also fit a Ford Fusion or Chevy Malibu?
No. The material meets Ford WSS-M4D871-A4 and GM GMW15572 as benchmarks, and the comparisons reference Ford CD4 platform mirrors (2017–2023 Fusion) and GM E2XX mirrors (2018–2024 Malibu) — but that is clip-architecture benchmarking, not interchange. This cap is a dedicated Toyota TNGA-K fitment.
How long will this part stay available?
The Koeep SKU carries a projected service life of 2026–2030, aligned with the TNGA-K platform sunset. NHTSA Vehicles in Operation data shows the XV70 Camry and XX50 Avalon remain in active fleet circulation through 2030, so the part stays relevant for that window.
Seal the mirror before the moisture wins. Skip the $285–$420 full assembly — order the Right Rearview Mirror Lower Bottom Cover Cap for Toyota Camry & Avalon 2019–2022 and close the housing the same afternoon.
Need fleet pricing or a hard-to-find trim? Request a quote, email support@koeep.com, or message us on WhatsApp.
- Right Rearview Mirror Lower Bottom Cover Cap for Toyota Camry & Avalon 2019–2022 — Koeep product page
- Body Parts | Koeep Auto & Motorcycle Body Components
- Complete Guide to 16879 Catalytic Converter for Toyota Avalon, Camry & Lexus ES350 3.5L (2005–2017)
- Toyota right mirror sub-assembly 87910-06A10 (XV70 Camry / XX50 Avalon) — OEM cross-reference cited in the source article
- SAE J2680 (2026 revision), SAE J2527, ASTM G155, and SAE J1979-2 — vibration, UV-aging, and OBD-II test references from the source article
- ISO 16505:2026, ISO 11358, ISO 16750-4, ISO 11359-2, ISO 11898-1:2026 — durability and material standards from the source article
- Toyota material spec TSM5516G, clip-retention spec TSC6114G, and NHTSA Vehicles in Operation data — as cited in the source article
- 2019-2022 Camry mirror parts
- 2026 automotive mirror standards
- 87910-06A10
- ASA-PC mirror cover
- Avalon mirror cover replacement
- Camry XV70 exterior trim
- DTC B1247 mirror heater
- DTC U0232 BSM
- ISO 16505 mirror compliance
- Koeep Toyota mirror cap
- rearview mirror lower cover cap
- SAE J2680 2026
- Toyota Camry mirror cover
- Toyota mirror housing
- Toyota TNGA-K mirror