870621 Starter Switch | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta starter switch from the Starting System group, weighing 0.22 kg and listed for 27 applications across the AQ, BB, MD, B, MB and AQD engine series.

🚤 Compatibility

• Engine Family: AQ, BB, MD, B, MB, AQD

Full model list at the end of this description.

⚙️ Key Features

• 0.22 kg
• 27 applications across six engine series
• Starting System group
• 12 V system
• Rated 13 A
• M22x1 thread

🔌 Function

Makes the starting circuit when it is turned, feeding the starter solenoid so the engine can be cranked.

⚠️ Common Signs of Failure

• Key turns but nothing happens, or starting is intermittent
• Key sticking, feeling gritty, or not springing back from the crank position
• Starter keeps running after the key is released
• Burning smell or heat at the switch body
• Corroded or arced terminals on the back of the switch

🛠️ Service Notes

• A second starter switch, 870685 at 0.127 kg, is listed here for a similar engine spread — they are different switches, so check the terminal arrangement and order by part number
• Isolate the batteries before working on the starting circuit, and check the battery, cables and earth before condemning the switch

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• BOSCH 0 342 315 001

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
• Volvo Penta AQ170B, AQ170C, AQ170A
• Volvo Penta BB115A, BB115B, BB115C
• Volvo Penta BB170B, BB170C, BB170A
• Volvo Penta MB20A, MB20B, MB20C
• Volvo Penta AQ115A, AQ115B
• Volvo Penta AQD21A, AQD21B
• Volvo Penta MD21B, MD21A
• Volvo Penta 100S, 110S
• Volvo Penta AQ165A
• Volvo Penta B20
• Volvo Penta BB165A