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The Door Jamb Light Lamp Switch 35400-S5A-013 is the genuine Matsushita (Panasonic) OEM assembly Honda uses for door-ajar detection across its 7th through 9th generation platforms and Acura's TL/TSX architecture. It is a single-pole, plunger-actuated ground-side switch that reports door status straight to the Body Control Module (BCM) and the Multiplex Integrated Control Unit (MICU).

Every plunger press grounds a signal circuit. That ground fires your dome light, the door-ajar warning chime, and the key-off accessory delay circuits. When the switch fails, you get dome lights that never shut off, phantom warnings, and — on 2026 hybrids — measurable battery drain.

2026 Compliance: What Standards Apply

For 2026, Honda's continued hybrid electrification of the Accord, Civic, and CR-V lineups demands body-switch contacts that meet ISO 16750-4 climatic load resilience and SAE J1455 environmental practice standards: consistent contact resistance below 50 mΩ across a -40°C to +85°C range, even under the humidity ingress common in door-jamb cavities.

Key Specifications

Materials and Construction

The 35400-S5A-013 uses a Matsushita-spec copper-alloy contact assembly with silver-cadmium oxide (Ag-CdO) weld-resistant contact surfaces in a glass-fiber-reinforced PBT (polybutylene terephthalate) housing. The precision-ground plunger and internal silicone boot seal block the moisture-wicking that causes contact oxidation and intermittent open-circuit faults — the primary root cause of the communication-loss codes below.

What Changed for 2026: BCM Polling and the 3.3V Reference

Honda's BCM firmware in Accord Hybrid, Civic Hybrid, and CR-V Hybrid models now runs tighter polling thresholds: the BCM expects a debounce-stable state transition within 30 ms of plunger actuation.

Chatter trips spurious codes

Aftermarket switches with slow-rise or chattering contacts can trigger spurious DTCs — specifically U0221 (Lost Communication with Door Switch G) and U0216 (Lost Communication with Door Switch B). U0221 maps to the driver's door and is the most common network DTC a failing jamb switch logs on Honda and Acura platforms.

Key 2026 update: Honda's multiplex body-network strategy has migrated door-switch signal sampling from a 12V pull-up to a 3.3V low-voltage reference on select 2026 models to cut quiescent current draw. At that voltage, the 35400-S5A-013's factory-spec ≤50 mΩ closed-circuit resistance is what keeps logic-low detection clean and prevents B1325 (Device Power Circuit Voltage) violations that can cascade into BCM limp-mode behavior.

OEM Cross-Reference Matrix

Only the Honda part in this matrix carries factory Matsushita Ag-CdO contact metallurgy — the arc-suppression and anti-welding behavior the 3.3V-reference architectures depend on. Aftermarket alternatives may show elevated contact resistance drift above 50,000 cycles.

DTC ranges this switch influences

• U0216–U0221 — Lost Communication with Door Switch B through G; CAN-bus network integrity.
• B1300–B1325 — BCM power circuit and input-signal plausibility.
• P0700–P0899 — transmission control system; door-ajar status can inhibit shift-interlock solenoid release on 2026 push-button shift architectures.

Fleet note: this switch remains the sole OEM door-ajar detection method across all listed platforms — no supersession path to a Hall-effect or CAN-node alternative. Plan a minimum 4-door replacement set per 80,000-mile service interval.

Fitment, Lifecycle, and Fleet Planning

The 35400-S5A-013 fits a wide Honda and Acura range:

• Honda Accord (1998–2018)
• Honda Civic (2001–2016)
• Honda CR-V (2002–2013)
• Honda Element (2003–2011)
• Honda Odyssey (1999–2004)
• Honda Crosstour (2012–2015)
• Honda Ridgeline (2006–2014)
• Honda Insight (2000–2006)
• Acura TL (2004–2008)
• Acura TSX (2004–2007)

Service life projects to 2026–2030 when the switch is installed with OEM-spec connector grease, backed by Matsushita durability specifications of 100,000+ actuation cycles.

While You Are In There: Complete the Lighting Job

A failing door switch usually shows up at night, when the dome light misbehaves. That is a good moment to audit the rest of your exterior lighting. For brake-light visibility, the 2X LED Strobe Flashing Blinking Lamp for Honda Accord Civic Brake Tail Light EAO flashes on braking so following drivers notice you sooner.

You can also fit LED License Plate Light Bulbs for Honda Civic Accord Odyssey Acura TL TSX MDX EA, browse the full Lighting & Lamps catalog, or read the Complete Guide to the Front Brake Dust Shield for Honda Accord 2008-2012 for your next maintenance job.

Diagnostic FAQ: 2026 Failure Symptoms and Fixes

Get the Door Jamb Switch 35400-S5A-013