Sumitomo 6918-1780 8-Way Green TPA Lock Retainer

The Component: Genuine Sumitomo 6918-1780 automotive connector front terminal retainer. RS Series / HD Series 2.3mm (090) nominal sizing classification / 8-position dual-row secondary lock plate (Green / Heavy-Duty Nylon / Secondary Terminal Position Assurance (TPA) / Component Alias Code: 69181780 / Global Order Reference: 6918-1780).

Applications & Fitment: Designed as a critical, factory original equipment (OE) secondary locking component engineered to guarantee physical terminal position assurance (TPA) within multi-pin automotive wiring junctions. This 8-way green locking wedge insert snaps into the front face of matching Sumitomo 2.3mm (090) sealed housings—prevalent across global Japanese platforms, most notably throughout Nissan, Toyota, Suburba, and Honda engine wiring architectures—serving as the definitive security backup for high-vibration connections.

Most commonly encountered inside the primary 8-pin headlight plug assemblies, front radar modules, bumper harness intersections, and ignition-related sub-harness blocks. Its primary duty is to mechanically block terminal back-out and isolate crimped copper pins from alignment shifts caused by extreme powertrain vibration or harness pulling during assembly. Highly vulnerable to cracking, warping, or loss of locking tabs when field technicians attempt to roughly dig the retainer out of the plug body using inappropriate sharp picks or un-profiled metal blades during terminal re-pinning or field diagnostic repair tasks.

Technical Attributes:

- Manufacturer Part Number: 6918-1780 / 69181780 (Brand: Sumitomo Wiring Systems / Genuine Factory Automotive Class)

- Product Series Taxonomy: RS Series / HD Series 2.3mm (090 inch) Automotive Interconnect Accessories

- Component Typology: Terminal Position Assurance (TPA) Lock Plate / Rear Front Holder Retainer

- Configuration Compatibility: 8-Position / 8-Way Dual-Row 2x4 Matrix Layout Path

- Primary Retention Function: Acts as a secondary mechanical block that locks primary housing plastic lances into place, preventing accidental male or female pin terminal back-out

- Base Structural Compound: Premium engineering polyamide polymer with high tensile strength and elastic threshold memory

- Color Profile: Factory Solid Green (Color-coded for instant visual confirmation of terminal seating completion on the harness assembly bench)

- Environmental Defense Profile: Engineered to operate in completely submerged or high-pressure sealed spaces; unaffected by direct contact with engine lubricants, hydraulic fluids, brake cleaner, or road salt residue

- Operational Thermal Window: Severe-duty parameters certified for continuous exposure within structural micro-climates ranging from -40°C up to +120°C

- Associated Housing Compatibility (Female Plugs): Inserts directly into matching Sumitomo 8-way sealed female connector plug housings (such as the 6185-1171, 6185-5179, and 6185-5181 series)

- Associated Housing Compatibility (Male Caps): Inserts directly into matching Sumitomo 8-way sealed male inline connector cap shrouds (such as the 6188-5542 and 6188-5544 series)

- Commercial Access: Tiered B2B wholesale trade volume pricing breaks apply instantly inside your basket for independent tuning garages, loom remanufacturers, and trade auto-electrical stockists.