# 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

## Details

- **Price:** 465.18 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 465.18 AUD | In stock |

## Images

- 870685 Starter Switch | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/870685-starter-switch-genuine-volvo-penta)
> Updated: 2026-09-21