# 8149186 Thermostat | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta 86 degree C thermostat from the Cooling System group, weighing 0.234 kg and listed for 41 applications across the TAD, TD, TWD, TMD, TID and TAMD series. It supersedes part number 1676306.

## 🚤 Compatibility

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

Full model list at the end of this description.

## ⚙️ Key Features

-   86 degree C opening temperature
-   0.234 kg
-   Supersedes 1676306
-   41 applications across six engine series
-   Quantity varies by assembly, most commonly one

## 🔌 Function

Opens at its rated temperature to let coolant flow to the cooler, holding the engine at its designed operating temperature.

## ⚠️ Common Signs of Failure

-   Engine running cold or slow to warm up, with the thermostat stuck open
-   Overheating and coolant loss with the thermostat stuck shut
-   Temperature gauge swinging up and down in normal running
-   Corrosion or scale locking the valve
-   Perished or split rubber seal around the thermostat

## 🛠️ Service Notes

-   Thermostat 8149182 is the 82 degree C version listed for the D series, so check the rating stamped on the thermostat being removed before ordering
-   Fit a new seal or gasket and check the coolant condition while the housing is open
-   Bleed the cooling system and check the temperature stabilises on a test run

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   8149186 → Supersedes 1676306 → Supersedes 1544683

### OEM / Related Numbers

-   1676306 earlier number superseded by this part
-   1544683 earlier number superseded by this part

### Other-Brand OEM Numbers

-   Mahle: THD 1 86
-   Wahler: 4619.86
-   Gates: TH51785G1

### Aftermarket / Verified Equivalents

-   Febi Bilstein: 11495
-   DT Spare Parts: 2.15071
-   Calorstat by Vernet: CT16953.86

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V, TAD1030VE
-   Volvo Penta TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
-   Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
-   Volvo Penta TAD1630G, TAD1630GE, TAD1630P
-   Volvo Penta TD121G-87, TD121GP, TD121GPB
-   Volvo Penta TWD1210G, TWD1210P, TWD1210PB
-   Volvo Penta TAD1031G, TAD1031GE
-   Volvo Penta TAD1631GE, TAD1631G
-   Volvo Penta TAMD122A, TAMD122A/C
-   Volvo Penta TWD1211P, TWD1211G
-   Volvo Penta TAD1032GE
-   Volvo Penta TAD1230G
-   Volvo Penta TAD1231GE
-   Volvo Penta TAD1232GE
-   Volvo Penta TD100G
-   Volvo Penta TD1030VE
-   Volvo Penta TD1210G
-   Volvo Penta TMD122A
-   Volvo Penta TWD1030ME
-   Volvo Penta TWD1031VE
-   Volvo Penta TWD1230ME

## Details

- **Price:** 198.69 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 198.69 AUD | In stock |

## Images

- 8149186 Thermostat | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8149186-thermostat-genuine-volvo-penta)
> Updated: 2026-09-06