21544456 Wiring Harness | Genuine Volvo Penta Part

🔧 Product Description

A dedicated engine harness connecting the exhaust overheat sensors to the control and alarm system on selected Volvo Penta V8 marine petrol engines.

🚤 Compatibility

• Engine Family: V
• HP Range: 225-320 HP

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta exhaust-temperature sensor harness
• Designed for the high-temperature exhaust-manifold area
• Factory-sealed marine connectors
• Correct branch lengths for port and starboard sensors
• Uses protective caps on sensor leads not required by the engine specification
• Engine type: V8 electronic-fuel-injected marine petrol

🔌 Function

Carries exhaust overheat sensor signals to the engine control module and alarm system.

⚠️ Common Signs of Failure

• False exhaust overheat alarm
• Overheat warning fails during testing
• Open- or short-circuit sensor code
• Heat-damaged wiring near the exhaust manifolds
• Corroded or loose sensor connectors

🛠️ 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 / Related Numbers

• 21544465 - protective cap for unused sensor leads
• 21544466 - alternate keyed protective cap

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta V8-270-CE-B, V8-300-A, V8-300-E-A, V8-300-B, V8-300-E-B, V8-300-CE-A, V8-320-CE-B, V8-300-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-CE-A, V8-225-CE-A, V8-225-CE-B, V8-270-A, V8-270-E-A, V8-270-B, V8-270-E-B, V8-270-CE-A
• Volvo Penta 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXiE-P, 5.7GXi-P, 5.7GiE-300-P, 5.7Gi-300-P, 5.7Gi-300-R, 5.7GiE-300-R, 5.0GXi-270-R, 5.0GXiE-270-R, 5.0GXiE-P, 5.0GXi-P