Beck/Arnley 143-0721 thermostat for the 1999-2004 Nissan Frontier V6 3.3L and other vehicles regulates coolant flow to hold the engine at its operating temperature. Also called an engine coolant thermostat, it stays closed while the engine warms up and opens to send coolant through the radiator.
- Application-specific construction
- Built from materials chosen for durability
Quick facts
- Part: Beck/Arnley 143-0721 thermostat
- Also called: engine coolant thermostat
- Fits: 1999-2004 Nissan Frontier V6 3.3L and other vehicles
- Condition: New
A Beck/Arnley thermostat that sticks open or closed can show up as overheating, a temperature gauge that stays low or weak heater output, though those signs can have other causes. Before replacing it, look over the hoses and the thermostat housing for coolant leaks, and check the coolant level only with the engine cool. If a stuck thermostat is the cause, this one replaces it.
Fits
This thermostat is listed for a wide range of Nissan, Infiniti and Mercury models. Besides the 1999-2004 Nissan Frontier V6 3.3L, it is a thermostat for the 1987-1995 Nissan Pathfinder V6 3.0L, the 1996-2000 Pathfinder V6 3.3L and the 1985-1994 Nissan Maxima V6 3.0L, and it matches OE form, fit and function. If your vehicle is not named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
- Quantity per vehicle: 1
- Engine codes listed: V6-3.0L, V6-3.3L, V8-4.1L
- Condition: New
In the box
One thermostat. Each listed vehicle takes one.
Interchange: 12T33D · 212000B000 · 21200V5015 · 21200V7205 · 21200V7206 · 21200V720A · 33737 · F7XY8575AA · 268180 · 13948 · S394180
This part cross-references / interchanges with the following part numbers:
12T33D, 212000B000, 21200V5015, 21200V7205, 21200V7206, 21200V720A, 33737, F7XY8575AA, 268180, 13948, S394180
Frequently Asked Questions
Is this the right Nissan Frontier thermostat for a 1999-2004 V6 3.3L?
Yes. Beck/Arnley 143-0721 is listed for the 1999-2004 Nissan Frontier V6 3.3L. Other models are covered in the "Vehicles it fits" section.
Does this work as a Nissan Maxima thermostat on a 1985-1994 V6 3.0L?
Yes. This thermostat is listed for the 1985-1994 Nissan Maxima V6 3.0L, and that engine takes one.
What do I get with this Beck/Arnley thermostat?
This listing is one thermostat. Each listed vehicle takes one.
How can I tell if the thermostat on my engine is sticking?
The engine may overheat, the temperature gauge may stay low, or heater output may drop. Other cooling problems can look the same, and a shop can test the system with the engine running.
Is 21200V7205 an interchange number for Beck/Arnley 143-0721?
Yes. 21200V7205 is one of the numbers Beck/Arnley 143-0721 replaces, along with 212000B000 and 21200V5015.
