870846 Glow Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 12 V glow plug from the Engine group, for production order 3124096, weighing 0.084 kg and listed for 2 applications across the MD and AQD engine series. It supersedes 870680.

🚤 Compatibility

Typically suits:

• Volvo Penta MD21A
• Volvo Penta AQD21A

• Engine Family: MD, AQD
• Serial Range: 12V, MO-3124096/XXXX

⚙️ Key Features

• 12 V
• For production order 3124096
• 0.084 kg
• Supersedes 870680

🔌 Function

Heats the combustion chamber before cranking so a cold engine will fire and run cleanly from the first turns.

⚠️ Common Signs of Failure

• Hard starting from cold, easy starting when warm
• White smoke and rough running for the first half minute
• Preheat lamp behaving abnormally or the circuit fuse blowing
• Plug tip swollen, blistered or burnt away on removal
• Open circuit or a short measured across the plug

🛠️ Service Notes

• This plug carries the production order 3124096 reference — check it against the engine build before ordering
• Test all the plugs rather than replacing one; a single failed plug usually means the others are at the end of their life too
• Free a seized plug carefully with penetrating oil and heat cycles — snapping one off in the head is a cylinder-head-off job

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 870846 → Supersedes 870680

OEM / Related Numbers

• 870680 earlier number superseded by this part

Other-Brand OEM Numbers

• Bosch: 0 250 200 055
• Champion: CH65
• Champion: CH65002
• Delphi: HDS225
• Valeo: 345167

Aftermarket / Verified Equivalents

• Beru: GV107
• Beru: GV108
• Hidria: H0611
• Kessel-Spada: C9194
• Kessel-Spada: C9534

📦 Condition

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