Bosch 1928301083 Grey Silicone Single Wire Seal 

The Component: Genuine Bosch 1 928 301 083 automotive silicone single wire insulation seal. Compact 1.1A / Jetronic / EV1 / BDK Series individual terminal cavity moisture protection sleeve (Grey / VMQ Silicone / 3-Ring Ribbed Geometry / Component Alias Code: 1928301083 / Global Order Reference: 1-928-301-083).

Applications & Fitment: Engineered as an essential factory original equipment (OE) environmental barrier to safeguard critical low-voltage electrical terminals against water, engine fluids, atmospheric road salt, and fine dust penetration. Widespread across premium global automotive, heavy commercial, and motorsport wiring looms, it is the primary wire seal relied upon within Bosch engine management harnesses, including fuel pressure sensor plugs, camshaft/crankshaft position connectors, and injector clips. Sized precisely to slip over standard thin-wall automotive copper conductors before crimping, ensuring a pressurized, moisture-proof vacuum fitment once the terminal pin is fully seated inside the connector cavity shroud. Highly vulnerable to mechanical tearing or deformation if technicians attempt to reuse old hardened seals, crush them during manual non-profiled crimping operations, or accidentally pierce the silicone neck with sharp steel multi-meter diagnostic probes during field electrical fault-finding.

Technical Attributes:

- Manufacturer Part Number: 1 928 301 083 / 1928301083 (Brand: Bosch / Genuine Premium Automotive Class)

- Product Series Taxonomy: Compact 1.1A / Jetronic / EV1 / BDK Series Interconnect System Accessories

- Component Component Type: Single Wire Seal (SWS) / Individual Wire Insulation Grommet

- Target Wire Insulation Diameter Range: Precision engineered to accommodate thin-wall automotive conductors with an outer insulation diameter spanning 1.20mm up to 2.10mm (typically matching 0.35mm² to 0.75mm² wire cross-sections depending on insulation thickness)

- Cavity Matching Diameter: Designed for high-compression seating inside standard Bosch 3.4mm-3.5mm terminal entry bores

- Sealing Geometry: Triple-ring external rib deflection profile paired with an elongated stabilizing rear support neck for enhanced stress-relief at the wire exit path

- Structural Base Compound: High-performance, low-durometer VMQ Silicone Rubber engineering elastomer

- Color Profile: Factory Solid Grey (Color-coded for rapid workshop identification of sizing tiers)

- Environmental Resistance Level: Rated for absolute watertight, splashproof, and dustproof vacuum integrity; engineered to withstand direct exposure to engine oil, diesel fuel, and automotive solvents without swelling or degrading

- Operational Thermal Window: Severe-duty parameters engineered to handle brutal under-hood micro-climates from -40°C up to +130°C (with brief peak resilience margins up to +150°C)

- Associated Mating Components (Not Included): Fits seamlessly onto matching Bosch 2.8mm flat box receptacle contacts and 1.1mm/1.2mm/1.5mm pins prior to crimping; seats perfectly into matching Bosch housings such as the 1-928-403-110 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.