Stant 48258 Engine Coolant Thermostat

Brand	Stant 48258
Bypass Plate Diameter (in)	1.1
Flange Diameter (Without Seal) (in)	2.12
Freight Class	70
Height from Flange to Bottom (in)	1.3
Height from Flange to Top of Bridge (in)	0.68
Temperature (F)	180 degrees
Product line	OE Exact Thermostat
Fits	INFINITI · 4 vehicles

OE exact design. Original equipment design for a direct-fit thermostat replacement.

Stainless steel assembly. Engineered for smooth performance and long service life.

180-degree thermostat. Helps regulate engine coolant temperature precisely.

$16.75Free shipping

In stock · usually ships same day before 1pm CST

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OE Exact Thermostat for Infiniti G20

The Stant OE Exact Thermostat 48258 is an engine coolant thermostat built to match original equipment design for 1999-2002 INFINITI G20 applications. It uses a stainless steel assembly and durable materials to support smooth coolant flow control and long service life.

Key Features

OE Exact Thermostat line for OE-style fit and function
180 Degrees F opening temperature
Stainless steel assembly engineered for consistent operation
Bypass plate diameter: 1.1 in.
Flange diameter without seal: 2.12 in.
Height from flange to bottom: 1.3 in.
Height from flange to top of bridge: 0.68 in.

Product Details

Stant 48258 is designed for drivers servicing the cooling system on a 1999-2002 INFINITI G20. As part of the OE Exact Thermostat product line, it follows original equipment design targets for fit and temperature control, with a 180 Degrees F rating that helps regulate engine operating temperature. The stainless steel assembly and durable construction are specified to deliver smooth performance in everyday cooling system use. This part number, 48258, is a direct-fit thermostat choice for INFINITI G20 cooling system maintenance.

This part cross-references OE replacement applications for the same vehicle platform, including 14818.

Common Issues It May Address

Engine running too cool or taking too long to reach operating temperature
Temperature fluctuations during normal driving
Cooling system service on a 1999-2002 INFINITI G20
Thermostat replacement when the original unit no longer regulates flow correctly
Restoring proper coolant temperature control after wear-related thermostat issues

Installation Notes and Tips

Verify the thermostat housing, flange dimensions, and temperature rating before installation. Match the 180 Degrees F specification to the vehicle’s cooling system requirements, and inspect the sealing surfaces and coolant condition during service. For 1999-2002 INFINITI G20 repairs, confirm the replacement part number 48258 against the removed thermostat and vehicle service information before reassembly.

Quality Assurance

Stant OE Exact Thermostat parts are built to original equipment design standards using durable materials and a stainless steel assembly for consistent operation. Part number 48258 is intended for 1999-2002 INFINITI G20 applications listed in the fitment data.

This part fits 4 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Position	Notes
2002	INFINITI	G20	N/A	Temperature 180 Degrees; Part Replacement Replaced by 14818; OE Temperature; OE Exact Thermostat
2001	INFINITI	G20	N/A	Temperature 180 Degrees; Part Replacement Replaced by 14818; OE Temperature; OE Exact Thermostat
2000	INFINITI	G20	N/A	Temperature 180 Degrees; Part Replacement Replaced by 14818; OE Temperature; OE Exact Thermostat
1999	INFINITI	G20	N/A	Temperature 180 Degrees; Part Replacement Replaced by 14818; OE Temperature; OE Exact Thermostat
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