# 20528477 Sensor | Genuine Volvo Penta Part

## 🔧 Product Description

This genuine Volvo Penta sensor is an OEM service component used in the Camshaft / Cam-Gear Position Sensor. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 9-litre TAD9 electronic diesel application. Technical identification: Camshaft speed/position sensor; 2-pole connector; DT replacement lead length 1020 mm. In service, it measures the specified engine speed, position, pressure or temperature condition and sends the corresponding signal to the instrument or engine-control system. Selection must be confirmed by OEM part number 20528477, the exact model/product number, serial number and installed assembly configuration.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD940GE
-   Volvo Penta TAD941GE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Genuine Volvo Penta OEM sensor
-   OEM part number 20528477
-   Technical distinction: Camshaft speed/position sensor; 2-pole connector; DT replacement lead length 1020 mm
-   Inspect the connector and target/port, install to the specified depth and torque, then verify live-data response and stored fault codes.

## 🔌 Function

Measures the specified engine speed, position, pressure or temperature condition and sends the corresponding signal to the instrument or engine-control system. Inspect the connector and target/port, install to the specified depth and torque, then verify live-data response and stored fault codes.

## ⚠️ Common Signs of Failure

-   Fault codes, alarms or an implausible live-data/instrument reading
-   Intermittent signal loss caused by vibration, heat or connector movement
-   Poor starting, derating or unstable engine control
-   Open circuit, short circuit or out-of-range resistance/voltage
-   Corroded terminals, damaged wiring or a cracked sensor body

## 🛠️ Service Notes

-   Note how the sensor sits and how its lead is routed before removing it, and support the harness so refitting does not leave the cable strained or rubbing
-   Turn the sensor with a spanner on its hex only — never lever or twist it by the connector body or the wiring, which breaks the internal joint even when the sensor looks undamaged
-   Renew the O-ring or sealing washer where one is fitted, and do not add thread sealant unless the manual for your engine specifies it; sealant on the threads can break the earth path of a sensor that earths through its body
-   Tighten to the figure in the workshop manual for your engine — overtightening distorts the housing and shifts or destroys the sensing element
-   Make sure the connector is clean, dry and fully latched home and check the pins for corrosion and spread — a poor connector accounts for a great many faults blamed on the sensor — then run the engine and confirm the reading or warning lamp behaves sensibly before returning the boat to service

## 🔄 Supersession & Cross Reference

### Other-Brand OEM Numbers

-   Bosch: 0 281 002 458

### Aftermarket / Verified Equivalents

-   DT Spare Parts: 2.25085
-   Cojali: 21200016

## 📦 Condition

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

## Details

- **Price:** 314.25 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 314.25 AUD | In stock |

## Images

- 20528477 Sensor | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20528477-sensor-genuine-volvo-penta)
> Updated: 2026-10-08