# 21574984 Dosage Valve | Genuine Volvo Penta Part

## 🔧 Product Description

Electronically controlled SCR dosing valve rated at approximately 9 kg/h. It meters and atomises AdBlue/DEF into the exhaust stream upstream of the SCR catalyst on Volvo Penta TAD11 and TAD13 industrial engines.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD1371-75VE
-   Volvo Penta TAD1170-72VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Exact TAD1170-1172VE and TAD1371-1375VE fitment
-   9 kg/h calibrated dosing capacity
-   Electronically controlled injector
-   Multiple documented aftermarket alternatives
-   Designed for urea/DEF and hot exhaust service
-   Engine type: Electronically controlled industrial diesel with SCR

## 🔌 Function

Injects a precisely metered DEF spray so the SCR catalyst can reduce nitrogen-oxide emissions.

## ⚠️ Common Signs of Failure

-   SCR efficiency or NOx fault codes
-   DEF crystallisation around the nozzle
-   Engine derate or emissions warning
-   Incorrect DEF consumption
-   Open-circuit, short-circuit or poor spray pattern

## 🛠️ Service Notes

-   Treat the exhaust aftertreatment system as clean work, and let nothing but the correct grade of exhaust fluid near the lines
-   Depressurise the dosing system and let the exhaust cool before removing the valve, and expect some fluid spillage — rinse it off with water before it dries into crystals
-   Clean crystal deposits off the mounting seat and the exhaust boss, and fit the new gaskets, sealing rings or sleeve supplied with the valve
-   Tighten the mounting fixings evenly and to the figures in the workshop manual for your engine, then check the fluid line union for leaks
-   Afterwards, clear the stored fault codes and run the dosing system check with Volvo Penta diagnostic equipment so the system primes and delivery is confirmed

## 🔄 Supersession & Cross Reference

### Other-Brand OEM Numbers

-   VOE21574984

### Aftermarket / Verified Equivalents

-   Olsson Parts: 119513
-   SRP: DV-74984
-   AUGER: 109941

## 📦 Condition

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

## Details

- **Price:** 1214.81 AUD
- **Vendor:** Volvo Penta
- **Type:** Injectors & Injection
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1214.81 AUD | In stock |

## Images

- 21574984 Dosage Valve | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21574984-dosage-valve-genuine-volvo-penta)
> Updated: 2026-09-06