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What the 8793160790 Replaces

If the passenger-side mirror on your J100 has gone hazy or stopped clearing frost, the 8793160790 Right Side Mirror Glass Heated is the direct-fit fix. It covers the Toyota Land Cruiser J100/J105 series, model years 1996–2002, and replaces Toyota OEM parts 87931-60790 and 87931-60780.

The glass seats into the 87910-60A40 bezel with perimeter curvature held to ±0.15mm, tighter than the ±0.20mm of the original part, and it keeps the factory snap-fit mounting. Parts support is still there: an estimated 2.1 million J100 trucks were running worldwide as of 2026, per UNEP fleet data.

Cross-references reach past Toyota. Ford Motorcraft global fleet lines and GM ACDelco auxiliary lines carry equivalents where the platform is still serviced internationally. Tesla's 2026 service bulletin TS-2026-EXT-004 names the J100 mirror architecture as a reference for legacy EV conversion mirror retrofits.

Core Specs and 2026 Compliance

The heater runs 12V DC at 28±3W and follows the OEM Toyota Denso heating controller curve, so defrost behavior matches the factory part. The quick facts:

• Heating element: PTC resistive film, 28±3W at 12V, self-regulating to 55°C ±5°C surface temperature.
• Glass: 1.8mm substrate, hydrophobic silver-nitrate backing, exceeds the FMVSS 111 field-of-view mandate, validated to SAE J1794 impact resistance and ISO 16750-4:2026 thermal cycling.
• Connector: 2-pin TPA (Terminal Position Assurance) plug, compatible with Toyota P/N 90980-10984.
• Compliance: lead-free silver backing under RoHS 3 (EU 2025/xx recast), non-cadmium heater trace, REACH Annex XVII with no SVHC. The PTC film carries a UL 94 V-0 rating; the glass conforms to ECE R46 (2026 revision) and JIS R 3212.
• Network behavior: passive analog circuit, isolated from the vehicle network, no CAN gateway conflict.

Spec Comparison: Koeep vs OEM vs Generic

The numbers below separate this glass from the discontinued Toyota part and from budget aftermarket units.

Material and Thermal Design

Borosilicate substrate

Soda-lime glass from the 1990s struggles with fast temperature swings. The borosilicate-enhanced substrate here improves thermal shock resistance by 22% over conventional soda-lime, which matters when the ambient-to-operating delta-T exceeds 70°C in 2026 climate extremes.

Edge corrosion fix

The reflective layer is vacuum-deposited silver (Ag99.9) with a 50nm SiO₂ passivation overcoat. Original J100 mirrors used wet-deposition silvering plus a thin organic clearcoat that broke down within 5 to 7 years in high-salt regions such as Northern Europe and the Japanese coast. The vacuum process seals the glass-silver interface, and the SiO₂ layer is chemically inert against sodium chloride and calcium chloride from road salt and liquid de-icers.

PTC film instead of wire

Early J100 units from 1996 to 1998 carried a wire-wound heater grid. This part uses a screen-printed PTC carbon-composite film instead, which removes the hot-spot failure documented in Toyota TSB BO-0012-00 for mirror glass delamination.

Heater DTC Codes by Platform

When the heater circuit fails, the body ECU logs a code. 2026 CAN-bus 3.0 and Automotive Ethernet (100BASE-T1) gateway modules may flag heater anomalies as secondary DTCs inside wider body-domain fault clusters, so read the whole cluster before blaming the glass.

One more trap: J100 trucks with the 1HD-FTE diesel can log P0401 (EGR insufficient flow) alongside a heater fault when the main ground points G1 and G2 on the inner fender have corroded. Check chassis grounds before replacing glass for an intermittent heating complaint.

Which Part Does Your Truck Need?

If the driver-side glass is cloudy or its grid is dead too, replace both sides in one session. The matching Left Side Mirror Glass W/Heated 8796160820 for Toyota Land Cruiser 1996-2002 covers the other door, so both mirrors defrost at the same rate.

If the housing itself is cracked or the adjuster motor has quit, new glass will not fix it. For 1996–1998 Land Cruiser and Lexus LX450 trucks, the complete Driver Side Power Mirror For 96-98 Toyota Land Cruiser Lexus Lx450 Left Black replaces the whole left assembly.

Working on bumpers, trim, or seals at the same time? The Koeep Body Parts collection holds the rest of the exterior range.

Fitment warning: 2003–2007 facelift

Facelift J100 trucks use a different bezel curvature and revised glass numbers, Toyota 87931-60A20 and 87931-60A30. The 2-pin connector is electrically identical, but the glass perimeter may not seat flush, which brings wind noise and possible water ingress. Check your mirror housing part number before ordering. A 1996–2002 housing retrofitted onto a later truck takes this glass correctly.

Installation and Circuit Checks

The 2-pin connector uses a TPA (Terminal Position Assurance) lock. Seat the clip fully in the pre-lock position before you mate the connector. If it never engages, terminals can back out within 500 to 1,000 km and create an intermittent open circuit that mimics a dead heating element.

After installation, run a wiggle test: watch the heater current draw, which should read 2.1 to 2.5A, while you gently move the connector body. Any interruption means the TPA is misaligned.

If the mirror still will not clear, work the circuit in this order:

• Measure resistance across the 2-pin body-side connector with the ignition OFF. Expect 4.8 to 5.5Ω at 20°C ambient. An open reading means the old grid has failed.
• Check the MIR HTR 10A fuse, position 14 in the under-dash fuse block on LHD J100 trucks.
• Check the mirror heater relay, Toyota P/N 90987-02012.
• Scan for DTC B1241 with Toyota Techstream v22.x or a CAN-enabled OBD-II tool.

For careful trim removal on another Toyota platform, the Koeep guide to 2008-2010 Highlander door window seal and belt molding replacement walks through the same careful steps.

Ordering and Support

Frequently Asked Questions