# 21876480 Sensor | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine electronic pressure sensor used in selected Volvo Penta TAD5 and TAD7 engine-monitoring systems. listed for D7A-TA-HE marine diesel engines (also D5A/D7A/D7C series contacts-and-sensors group).

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D5A-B TA
-   Volvo Penta D5A-T
-   Volvo Penta D5A-TA
-   Volvo Penta TD720VE PP
-   Volvo Penta TD520VE
-   Volvo Penta D7A-B TA
-   Volvo Penta D7A-T
-   Volvo Penta D7A-TA
-   Volvo Penta D7C-B TA
-   Volvo Penta D7C-TA
-   Volvo Penta MD2010
-   Volvo Penta MD2010B

-   **Engine Family:** D, TD, MD
-   **HP Range:** Approximately 160-330 HP
-   **Year Range:** Approximately 2005 - 2021
-   **Serial Range:** For engine mounted heat exchanger., SN11184144-

## ⚙️ Key Features

-   Factory-calibrated electrical characteristics
-   Sealed engine-grade connector or housing
-   Supports control, monitoring and protection functions
-   Model- and software-specific operation where applicable
-   Engine type: Four- or six-cylinder turbocharged industrial diesel
-   Also supersedes Volvo part numbers 881667 and 881965

## 🔌 Function

Converts the assigned operating condition into an electrical signal or processes that signal for the engine-control, display and protection system.

## ⚠️ Common Signs of Failure

-   Incorrect, unstable or missing data
-   Implausible-signal or communication fault code
-   Engine warning, derate or shutdown
-   Open circuit, short circuit or internal electronic failure

## 🛠️ 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

### OEM Supersession Chain

-   21876480 → Supersedes 874650

### OEM / Related Numbers

-   874697 earlier number superseded by this part
-   874650 earlier number superseded by this part
-   866838 - related earlier Volvo Penta pressure-sensor reference

## 📦 Condition

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

## Details

- **Price:** 639.65 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 639.65 AUD | In stock |

## Images

- 21876480 Sensor | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21876480-sensor-genuine-volvo-penta)
> Updated: 2026-10-07