# 3843751 Sensor | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta sensor from the Ignition and Control Systems group, weighing 0.095 kg and listed for 5 applications across V series engines. It supersedes part number 3857696, which was catalogued earlier as an idle air control valve. Fits Volvo Penta 4.3L, 5.0L and 5.7L GXi/OSi petrol marine engines (variants B-N, e.g.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta 4.3GXiE-225-R
-   Volvo Penta 4.3GXiE-M
-   Volvo Penta 4.3GXiE-P
-   Volvo Penta 4.3GXiE-Q
-   Volvo Penta V6-225-E-A

-   **Engine Family:** V
-   **HP Range:** 225 HP

## ⚙️ Key Features

-   Ignition and Control Systems group
-   0.095 kg
-   Supersedes 3857696, catalogued earlier as an idle air control valve
-   5 applications across the V series

## 🔌 Function

Measures its parameter at the point it is fitted and reports it to the control system, so fuelling and idle control respond to real conditions.

## ⚠️ Common Signs of Failure

-   Erratic or hunting idle
-   Fault code stored against the sensor circuit
-   Poor starting or stalling when the throttle closes
-   Corrosion or damp in the connector
-   Reading absent or clearly out of range on a diagnostic check

## 🛠️ Service Notes

-   The number this replaces was catalogued as an idle air control valve, so confirm which component your parts list actually shows before ordering
-   Check the loom and connector first, and renew the seal or O-ring when fitting

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3843751 → Supersedes 3857696

### OEM / Related Numbers

-   3857696 earlier number superseded by this part

### Aftermarket / Verified Equivalents

-   Crusader: R084003
-   Mercruiser: 803149

## 📦 Condition

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

## Details

- **Price:** 609.66 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 609.66 AUD | In stock |

## Images

- 3843751 Sensor | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3843751-sensor-genuine-volvo-penta)
> Updated: 2026-10-07