22637542 Relay | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta relay from the Lighting group, weighing 0.045 kg and superseding part number 873740, whose 194 applications across D, TAMD, AD, TMD, HS and KAMD series engines it covers. Very broad fitment makes it a practical stock item.

⚙️ Key Features

• Lighting group part
• 0.045 kg
• Supersedes 873740
• Covers 194 applications across D, TAMD, AD, TMD, HS and KAMD series engines
• Very broad fitment, so a practical stock item

🔌 Function

Switches a circuit under the control of a low-current signal, so a small switch or control output can carry a much larger load.

⚠️ Common Signs of Failure

• Circuit dead, or working only sometimes
• Relay chattering or buzzing instead of pulling in cleanly
• Contacts burnt, pitted or welded together, so the circuit stays live
• Burnt smell or discolouration at the relay or its base
• Terminals corroded, or the relay loose in its holder

🛠️ Service Notes

• The number it replaces, 873740, was catalogued earlier as a wiring harness, so older records against that number may describe it differently
• Check the supply, earth and connector before condemning the relay - a corroded terminal gives exactly the same intermittent behaviour
• Find why contacts burnt before fitting a new relay, as an overloaded or shorted circuit will destroy the replacement too

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 22637542 → Supersedes 873740 → Supersedes 860339 → Supersedes 846762

OEM / Related Numbers

• 873740 earlier number superseded by this part
• 873551 earlier number superseded by this part
• 873532 earlier number superseded by this part
• 873550 earlier number superseded by this part
• 873552 earlier number superseded by this part
• 860339 earlier number superseded by this part
• 846762 earlier number superseded by this part

📦 Condition

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