{"product_id":"volvo-penta-wiring-harness-21542305","title":"Volvo Penta Wiring Harness 21542305 | OEM Engine Electrical Harness","description":"\u003ch2\u003eVolvo Penta Wiring Harness — Part #21542305\u003c\/h2\u003e\n\n\u003cp\u003eThis is the genuine OEM main engine wiring harness for Volvo Penta D4 and D6 marine diesel engines. It provides the primary electrical backbone connecting engine sensors, control modules, fuel system components, and the EVC (Electronic Vessel Control) network. Built to factory specifications with marine-grade wiring, UV-resistant insulation, and corrosion-resistant terminals for reliable performance in saltwater environments.\u003c\/p\u003e\n\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 21542305\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Volvo Penta\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Wiring Harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine Electrical \/ EVC Network\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New OEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta D4 series marine diesel engines (EVC-equipped)\u003c\/li\u003e\n\u003cli\u003eVolvo Penta D6 series marine diesel engines (EVC-equipped)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment is serial-number dependent\u003c\/strong\u003e — confirm engine model, serial number, and parts diagram position before ordering. Harness routing and connector configurations vary by engine generation and build specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Marine-grade wiring with UV and abrasion-resistant insulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e Corrosion-resistant connectors rated for marine environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Proper gauge conductors for reliable current delivery to all engine circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Direct OEM replacement — no modification required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEstimated Weight:\u003c\/strong\u003e Approx. 1.2 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Confirm diagram position and harness routing in your engine's parts documentation before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e This harness is the right replacement when electrical diagnostics have traced intermittent faults, sensor dropouts, or EVC communication errors back to the main engine harness rather than an individual sensor or connector. It's also the correct part for engines that have suffered water intrusion into the harness, chafing damage from poor routing, or corrosion at multiple connector points that makes individual repair impractical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Issues:\u003c\/strong\u003e At this price point, customers understandably want to be certain before ordering. The most common situation we see is a harness that has been partially repaired over time — splices, taped sections, and corroded connectors that keep causing new faults. If you're chasing electrical gremlins that keep moving around, a full harness replacement is often more cost-effective than continued piecemeal repairs. Always confirm the part number against your engine serial number — D4 and D6 harnesses can look similar but are not interchangeable.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cp\u003eReplace this harness when electrical diagnostics confirm harness-level faults, when corrosion or physical damage is found at multiple points, or when the harness has been compromised by water intrusion or heat damage. Inspect all connectors, routing clips, and grounding points during replacement.\u003c\/p\u003e\n\n\u003ch3\u003eService Interval\u003c\/h3\u003e\n\u003cp\u003eWiring harnesses are not a scheduled replacement item. Inspect the harness and all connectors at each major service interval for chafing, corrosion, cracking insulation, or loose connections. Replace on condition when damage is found.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this is the correct harness for my engine?\u003c\/strong\u003e\u003cbr\u003eA: Match by engine model and serial number against the Volvo Penta parts diagram for your specific engine build. D4 and D6 harnesses share similar connectors but are not interchangeable. Send us your serial number and we'll confirm before you order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can individual sections of the harness be repaired instead of replacing the whole unit?\u003c\/strong\u003e\u003cbr\u003eA: Minor repairs to individual connectors or short sections are possible, but Volvo Penta recommends full harness replacement when damage is extensive or when multiple fault points are present. A compromised harness can cause difficult-to-diagnose intermittent faults that a full replacement resolves cleanly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to reprogram anything after replacing the harness?\u003c\/strong\u003e\u003cbr\u003eA: The harness itself is passive — it carries signals but does not store data. No reprogramming is required for the harness alone. However, if any control modules were disconnected during the process, verify EVC network communication after reinstallation.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-wiring-harness-21138239\"\u003eVolvo Penta Wiring Harness 21138239\u003c\/a\u003e — related engine harness\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-wiring-harness-21138237\"\u003eVolvo Penta Wiring Harness 21138237\u003c\/a\u003e — related engine harness\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-wiring-harness-21292450\"\u003eVolvo Penta Wiring Harness 21292450\u003c\/a\u003e — related engine harness\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-breakout-harness-sku-88890016\"\u003eVolvo Penta Breakout Harness 88890016\u003c\/a\u003e — diagnostic breakout harness\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-temperature-sensor-21531072-oem-d11-d13-d16-engine-temp-sensor\"\u003eVolvo Penta Temperature Sensor 21531072\u003c\/a\u003e — sensor connected via this harness\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/volvo-penta-connector-kit-oem-electrical-connector-set\"\u003eVolvo Penta Connector Kit — OEM Electrical Connector Set\u003c\/a\u003e — replace connectors during harness service\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43563988287524,"sku":"21542305","price":3418.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ef5642ad-4079-489f-a0b8-5f23c27e01e1.png?v=1772667070","url":"https:\/\/marisolmarine.com\/products\/volvo-penta-wiring-harness-21542305","provider":"Marisol Marine Company","version":"1.0","type":"link"}