Thermostat – Toyota Diesel 1989–2004
Fits Toyota Hiace, Land Cruisers, Prado, Hilux - KZH & LH Series Diesel Models
Keep your Toyota diesel operating at the correct temperature with a high-quality replacement thermostat. Whether you're restoring factory cooling performance or upgrading your 1KZ-TE with a lower-temperature thermostat, this thermostat is engineered for reliable operation and long service life.
⚠️ Important
The 76°C (169°F) Low Temperature Thermostat is available ONLY for KZH (1KZ-TE) models.
All LH Series (2L, 2LT, 2LTE, 3L & 5L) engines receive the OEM factory temperature thermostat only.
Please select your engine and thermostat option before ordering.
Don't see your engine listed? We carry thermostats for virtually every Toyota engine from Hiace to Land Cruisers, to Prado, to Hilux. Simply contact us with your VIN and we'll confirm the correct part.
Available Options
KZH Models (1KZ-TE)
Choose from:
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82°C (180°F) – OEM Temperature
- Factory operating temperature.
- Recommended for stock vehicles and everyday driving.
-
76°C (169°F) – Low Temperature Upgrade
- Begins opening approximately 6°C (11°F) sooner than the factory thermostat.
- Recommended for:
- Heavy towing
- Mountain driving
- Hot climates
- Larger tire setups
- Modified or higher-performance 1KZ-TE engines
- Vehicles with upgraded cooling systems
LH Models (2L, 2LT, 2LTE, 3L & 5L)
All LH Series engines are supplied with the OEM factory temperature thermostat to maintain proper engine operating temperature.
A lower-temperature thermostat is not available for LH models through this listing.
What's Included
Key Features
-
OE Manufactured
- Precision engineered for proper fit, sealing, and dependable performance.
-
Reliable Cooling Performance
- Helps regulate coolant flow and maintain proper engine operating temperature.
-
Durable Construction
- Designed to withstand continuous heat cycling and long service life.
-
Direct Replacement
- Installs in place of your original thermostat with no modifications required.
Why Choose the 76°C Thermostat?
The optional 76°C thermostat for KZH 1KZ-TE models allows coolant to begin circulating earlier than the factory 82°C thermostat. It is a popular upgrade for owners who regularly tow, drive in hot climates, climb long grades, or have modified engines.
Please note: A lower-temperature thermostat is not a fix for an overheating engine. If your vehicle overheats due to a blocked radiator, worn fan clutch, failing water pump, or other cooling system issues, those problems must be repaired separately.
Vehicle Compatibility
Toyota Dyna
LH80, LY50, LY51, LY60, LY61, LY100, LY101, LY102, LY111, LY112, LY121, LY122, LY131, LY132, LY151, LY152, LY161, LY162, LY201, LY202, LY211, LY212, LY220, LY225, LY230, LY235, LY240, LY270, LY280, LY290
Toyota Hiace
KZH100, KZH100G, KZH106, KZH106G, KZH106W, KZH110, KZH110G, KZH116, KZH116G, KZH120, KZH120G, KZH126, KZH126G, KZH132, KZH132V, KZH138, KZH138V, LH100, LH100G, LH102, LH102V, LH103, LH103V, LH104, LH105, LH107, LH107G, LH107W, LH108, LH109, LH109V, LH110, LH110G, LH112, LH113, LH113K, LH113V, LH114, LH115, LH117, LH117G, LH118, LH119, LH119V, LH120, LH120G, LH123, LH123V, LH125, LH129, LH129V, LH140, LH140G, LH154, LH162, LH162V, LH164, LH166, LH168, LH168V, LH172, LH172K, LH172V, LH174, LH176, LH178, LH178V, LH182, LH182K, LH184, LH186, LH188, LH188K, LH20, LH20B, LH20V, LH24, LH30, LH30B, LH30V, LH32, LH42, LH50, LH50B, LH50G, LH50V, LH51, LH51B, LH51G, LH51V, LH56, LH56V, LH60, LH60B, LH60G, LH60V, LH61, LH61B, LH61G, LH61V, LH61VH, LH66, LH66V, LH70, LH70B, LH70V, LH71, LH71B, LH71G, LH71V, LH80, LH85, LH90, LH95, LXH12, LXH18, LXH22, LXH28, LY101, LY111, LY151, LY161, RH11, RH20B, RH20G, RH20V, RH22B, RH22G, RH22V, RH25, RH30B, RH30V, RH32B, RH32V, RH42B
Toyota Regius Ace
KZH100, KZH106, KZH110, KZH116, KZH120, KZH126, KZH132, KZH138, LH100, LH102, LH103, LH107, LH109, LH110, LH113, LH115, LH117, LH119, LH120, LH123, LH125, LH129, LH140, LH162, LH162V, LH168, LH168V, LH172, LH172K, LH172V, LH178, LH178V, LH182, LH182K, LH184, LH186, LH188, LH188K
Toyota Grand Hiace / Granvia / Regius / Touring Hiace
KCH10, KCH10W, KCH12, KCH16, KCH16W, KCH40, KCH40W, KCH46, KCH46W, LXH43, LXH49
Engine Compatibility
KZH Models
LH Models
Additional compatible engines include: 5LE, L, 1NZ-FE, 18R, 1GE, 21R, 21RC, 3T, 4M, 5M, 5ME, 5R, 12R, 12RM, 20R, 22R, 1JZ-FSE, 2JZ-FSE.
Need Help?
Not sure which thermostat is correct for your vehicle? Send us your VIN before ordering and we'll confirm the correct part for your engine.
For compatibility with specific vehicles, always verify using your VIN or OEM part number before purchasing.
