870685 Starter Switch | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta starter switch from the Starting System group, weighing 0.127 kg and listed for 30 applications across the MB, AQ, MD, BB, B and AQD engine series.

🚤 Compatibility

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

Full model list at the end of this description.

⚙️ Key Features

• 0.127 kg
• 30 applications across six engine series
• Starting System group

🔌 Function

Closes the starting circuit when operated, energising the starter solenoid to crank the engine.

⚠️ Common Signs of Failure

• Intermittent or dead cranking when the key is turned
• Key stiff, or failing to return from the crank position
• Starter continuing to turn after the key is released
• Heat, smell or discolouration at the switch
• Terminals arced, corroded or loose behind the panel

🛠️ Service Notes

• The other starter switch listed here is 870621 at 0.22 kg, covering a similar engine spread — check the terminal layout and mounting before ordering
• Isolate the batteries first, and rule out a flat battery, poor earth or corroded main cable before replacing the switch

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• BOSCH 0 342 309 005

📦 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 100S, 110S
• Volvo Penta AQ165A
• Volvo Penta AQD2B
• Volvo Penta AQD21A
• Volvo Penta B20
• Volvo Penta BB165A
• Volvo Penta MB10A
• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD21A
• Volvo Penta MD3B