# 423121 Inspection Cover | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta inspection cover in the alternative version, marked Alt, from the Engine group, weighing 0.616 kg and listed for 101 applications across the MD, TMD, TAD, TD, TWD and TID series engines.

## 🚤 Compatibility

-   **Engine Family:** MD, TMD, TAD, TD, TWD, TID, D, TAMD

Full model list at the end of this description.

## ⚙️ Key Features

-   Alternative version, marked Alt
-   0.616 kg
-   101 applications across six engine series

## 🔌 Function

Closes the inspection aperture in the engine, sealing the opening used to reach the internals.

## ⚠️ Common Signs of Failure

-   Oil weep or misting around the cover flange
-   Cover bowed or bent around the fixing holes
-   Gasket crushed or breaking up
-   Fixing threads pulled in the block

## 🛠️ Service Notes

-   Inspection cover 423120 is the standard version at 0.583 kg, only 33 grams lighter, so weight is no guide and the standard or alternative marking decides it
-   Renew the cover gasket at the same time

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TD100G-85, TD100A, TD100CHC, TD100G, TD100GG, TD100GGP, TD100HP, TD100HPB, TD100GG-85, TD100GP, TD100GP-85, TD100CRC
-   Volvo Penta TID121KG, TID121KGP, TID121KP, TID121L, TID121LG, TID121LGP, TID121LP, TID121FG, TID121K, TID121K-87
-   Volvo Penta TD120C, TD120A, TD120G, TD120GG PP, TD120HPP, TD120GG, TD120BHC, TD120BRC
-   Volvo Penta TD121G-87, TD121GGP-87, TD121G, TD121GG, TD121GGP, TD121GP, TD121CHC, TD121CRC
-   Volvo Penta TID100KG, TID100KGP, TID100K, TID100K-87, TID100KGP-87, TID100KP, TID100KP-87, TID100KPB-87
-   Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B, TAMD122P-C
-   Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V, TAD1030VE
-   Volvo Penta MD100A, MD100B, MD100B-CC
-   Volvo Penta TWD1210G, TWD1210P, TWD1210V
-   Volvo Penta TWD1211V, TWD1211P, TWD1211G
-   Volvo Penta D100A, D100B
-   Volvo Penta TAD1031G, TAD1031GE
-   Volvo Penta TAD1230G, TAD1230V
-   Volvo Penta TAMD102A, TAMD102D
-   Volvo Penta TAMD120A, TAMD120B
-   Volvo Penta TID120FG, TID120HPP
-   Volvo Penta TMD100A, TMD100C
-   Volvo Penta TMD120A, TMD120B
-   Volvo Penta TWD1230ME, TWD1230VE
-   Volvo Penta D120A
-   Volvo Penta TAD1032GE
-   Volvo Penta TAD121CHC
-   Volvo Penta TAD1231GE
-   Volvo Penta TAD1232GE
-   Volvo Penta TAMD103A
-   Volvo Penta TAMD121D
-   Volvo Penta TD1010G
-   Volvo Penta TD1030VE
-   Volvo Penta TD1210G
-   Volvo Penta TMD102A
-   Volvo Penta TMD121C
-   Volvo Penta TMD122A
-   Volvo Penta TWD1010G
-   Volvo Penta TWD1030ME
-   Volvo Penta TWD1031VE
-   Volvo Penta TWD1231VE

## Details

- **Price:** 222.05 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 222.05 AUD | In stock |

## Images

- 423121 Inspection Cover | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/423121-inspection-cover-genuine-volvo-penta)
> Updated: 2026-09-21