# 3854905 Sensor | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta sensor from the Ignition and Control Systems group, weighing 75 grams and listed for 26 applications. Knock (detonation) sensor assembly for Volvo Penta gasoline stern drive engines.

## 🚤 Compatibility

Full model list at the end of this description.

## ⚙️ Key Features

-   75 grams
-   26 listed applications
-   Ignition and Control Systems group

## 🔌 Function

Converts a running condition into an electrical signal the control system reads, so fuelling, ignition or protection can respond to it.

## ⚠️ Common Signs of Failure

-   Warning lamp or stored fault code
-   Rough running, hesitation or a stumble under load
-   Hard starting or an unexplained stall
-   Gauge or diagnostic reading that is clearly wrong
-   Corroded connector pins or a chafed sensor lead

## 🛠️ Service Notes

-   Four sensors in this group share the same plain name - 3854512 at 0.107 kg, 3854527 at 36 grams and 3855194 at 0.12 kg are the others, so order by part number
-   Check the connector and wiring for corrosion before replacing the sensor

## 🔄 Supersession & Cross Reference

### Aftermarket / Verified Equivalents

-   Sierra: 18-7679

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 5.7GSiI-A, 5.7GXi-A, 5.7GXi-B, 5.7GXiI-A, 5.7GXiI-B, 5.7Gi-A, 5.7GiI-A, 5.7GLPNCS, 5.7GiINCCCE, 5.7GiPNCACE, 5.7GiPNCSCE, 5.7GiPNCBCE, 5.7GIPNCMCE, 5.0GXi-A, 4.3GIJBYA, 4.3GIPBYCCE, 4.3GIPEFS, 4.3GIPLKDCE, 4.3GIPLKECE, 4.3GIPNCACE, 4.3GIPNCMCE, 4.3GIPNCSCE, 4.3GIPNCBCE, 4.3GIPWTRCE, 4.3GiJWTR, 4.3GXi-A

## Details

- **Price:** 300.65 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 300.65 AUD | In stock |

## Images

- 3854905 Sensor | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3854905-sensor-genuine-volvo-penta)
> Updated: 2026-10-07