24170981 Relay | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta relay from the Cables and Fuses group, weighing 0.085 kg and listed for 29 applications across D and TWD series engines. It supersedes 21918597, catalogued earlier as a control unit.

🚤 Compatibility

• Engine Family: D, TWD
• HP Range: 300-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Relay from the Cables and Fuses group
• 0.085 kg
• Supersedes 21918597, catalogued earlier as a control unit
• Listed for 29 applications across D and TWD series engines

🔌 Function

Uses a small control current to switch a much larger load, keeping the heavy current off the switch or control unit that commands it.

⚠️ Common Signs of Failure

• The circuit it feeds does nothing, with no click when it should switch
• Intermittent operation that improves if the relay is tapped
• Buzzing or chattering when the load comes on
• Burnt smell or a discoloured casing
• Pitted, burnt or welded contacts found on strip-down

🛠️ Service Notes

• It supersedes 21918597, which was listed earlier as a control unit - check what the position actually calls for before ordering
• Swap with a known-good identical relay to confirm the fault first
• Check the base terminals and the load circuit for heat damage; a relay that burns out usually has an overloaded or corroded circuit behind it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 24170981 → Supersedes 21918597

OEM / Related Numbers

• 21918597 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
• Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1683GE-B