21421475 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta wiring harness built with the connector keying, conductor sizes, branch lengths and terminal sealing required by the engine or vessel electrical system assigned to part number 21421475.

🚤 Compatibility

Typically suits:

• Volvo Penta D13B-A MP
• Volvo Penta D13B-H MP
• Volvo Penta D13B-G MP
• Volvo Penta D13B-B MP

• Engine Family: D

⚙️ Key Features

• Factory connector and circuit allocation
• Marine- and industrial-grade insulation
• Carries power, sensor, actuator and communication circuits
• Application-specific branch lengths
• Exact engine and option configuration controls fitment

🔌 Function

The harness distributes power and carries sensor, actuator and control signals between the engine and its electronic system.

⚠️ Common Signs of Failure

• Intermittent starting or running faults
• Several unrelated circuit codes
• Open- or short-circuit readings
• Corroded or pushed-back terminals
• Heat, oil or abrasion damage

🛠️ Service Notes

• Compare the new harness with the old one before fitting — check the connector types, the number of pins and the branch lengths, and lay it out alongside the old loom to confirm every branch reaches its component
• Disconnect the batteries before unplugging or fitting a harness, and support the loom as you work so its weight never hangs on a connector or a bulkhead grommet
• Route it along the original path and secure it with the original clips and ties, clear of hot exhaust surfaces, sharp edges and anything that moves; leave a service loop at each connector rather than pulling a branch tight
• Push every connector home until the lock latches and protect the joints with a marine dielectric grease — an intermittent electrical fault is far more often a partly seated or salt-corroded pin than a broken wire
• Renewing the harness is the right repair where insulation is chafed, brittle or oil-soaked, or where corrosion has tracked inside the connector bodies; patch repairs in a damp engine bay tend to fail again, and any single conductor that is repaired should be joined with tinned marine cable of the same gauge, a proper crimp and adhesive-lined heat-shrink

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21421475 → Supersedes 21377518

OEM / Related Numbers

• 21377518 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging