21492847 Relay Bracket | Genuine Volvo Penta Part

🔧 Product Description

A mounting bracket used to support relay sockets, relays and associated electrical-distribution hardware on Volvo Penta D4 and D6 engines.

🚤 Compatibility

• Engine Family: D
• HP Range: 145-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Supports relay and fuse equipment
• Maintains wiring and connector alignment
• Reduces electrical-component vibration
• Correct D4 and D6 engine mounting profile
• Designed for the matching relay box and sockets
• Quantity varies by assembly, most commonly one

🔌 Function

The bracket secures the relays and sockets so electrical contacts remain stable under engine vibration.

⚠️ Common Signs of Failure

• Relay box moving or rattling
• Loose relay sockets
• Intermittent faults caused by component movement

🛠️ Service Notes

• At 18 grams this is a light stamped bracket rather than a substantial mounting plate — check it for cracking or elongated holes rather than expecting it to bend, since thin steel like this fails by fatigue cracking, not gradual distortion
• It carries relay box 21494263, so if the box or its relays have been vibrating loose, check this bracket's fixings and the panel it mounts to at the same time

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21492847 → Supersedes 21392273 → Supersedes 3587174

OEM / Related Numbers

• 21392273 earlier number superseded by this part
• 3587174 earlier number superseded by this part
• 3587172 - Relay socket
• 21400091 - Relays
• 3171420 - Relays
• 21494263 - Relay box
• 23559411 - Related wiring harnesses
• 23748284 - Related wiring harnesses
• 21426987 - Speed monitor

📦 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
• Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13C4-B MP, D13C5-B MP, D13C1-A MH, D13C2-A MH, D13C3-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP
• Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G
• Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta D8A6-A MH, D8A6-A MG, D8A7-A MP, D8A8-A MP
• Volvo Penta D11B2-A MP, D11B1-A MP