# 3887305 Idler Pulley | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta idler pulley of the single type, from the Alternator, Charging, Electric Motor, Electric Drives group, weighing 0.544 kg and listed for 35 applications across D and TAD series engines. It is also included in kit 21676635 and supersedes part number 3809502.

## 🚤 Compatibility

-   **Engine Family:** D, TAD

Full model list at the end of this description.

## ⚙️ Key Features

-   Single type
-   Also included in kit 21676635
-   Supersedes 3809502
-   0.544 kg, 35 applications across D and TAD series engines
-   Quantity varies by assembly, most commonly one

## 🔌 Function

Guides and tensions the drive belt, taking up its route without driving anything itself.

## ⚠️ Common Signs of Failure

-   Squealing, chirping or rumbling from the belt drive
-   Bearing rough, tight or noisy when spun by hand
-   Grease weeping from the bearing seal
-   Belt tracking off the pulley, or with polished edges
-   Pulley face grooved or the rim chipped

## 🛠️ Service Notes

-   It is also supplied inside kit 21676635, so check whether the kit is the better buy for the job
-   Renew the belt and check the tensioner and the other pulleys at the same time

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3887305 → Supersedes 3809502 → Supersedes 20503093

### OEM / Related Numbers

-   3809502 earlier number superseded by this part

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D9A2J, D9A2G, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2A, D9A2C, D9A2E
-   Volvo Penta D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
-   Volvo Penta D11B4-A MP, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-C (IPS)
-   Volvo Penta TAD1640-42GE-B, TAD1640GE
-   Volvo Penta TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642GE, TAD1642VE
-   Volvo Penta TAD1643VE
-   Volvo Penta TAD1650GE
-   Volvo Penta TAD1651GE
-   Volvo Penta TAD1660-62VE
-   Volvo Penta TAD1662VE EU5
-   Volvo Penta TAD1670-72VE

## Details

- **Price:** 497.77 AUD
- **Vendor:** Volvo Penta
- **Type:** Belts, Pulleys & Tensioners
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 497.77 AUD | In stock |

## Images

- 3887305 Idler Pulley | Genuine Volvo Penta Part
- 3887305 Idler Pulley | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3887305-idler-pulley-genuine-volvo-penta)
> Updated: 2026-09-19