Walker 250-21030 Oxygen Sensor - Upstream

Brand	Walker 250-21030
Position	Upstream
Connector Gender	Male
Connector Shape	Radiused Polygon
Mounting Type	Threaded
Overall Length	6.61
Sensor Type	Non Heated
Thread Diameter	14.0
Universal Or Specific Fit	Specific
Wire Gauge Measurement	20
Wire Quantity	1
Wiring Harness Length	3.07
Product line	Walker Products OE
Fits	Saturn · 6 vehicles

OE replacement. Engineered as a direct-fit oxygen sensor for specific applications.

Threaded mount. Installs securely with a 14.0 mm thread diameter.

Non-heated design. Provides the diagnostic feedback the ECU requires.

$51.21Free shipping

In stock · usually ships same day before 1pm CST

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OE Oxygen Sensor for Saturn SC2, SL2, SW2

Walker Products OE 250-21030 is a specific-fit oxygen sensor for 1994 Saturn SC2, SL2, and SW2 upstream applications. Built as an OE-style replacement, it is matched to the vehicle’s application and ECU feedback requirements for California-ESV emissions vehicles.

Key Features

Specific-fit oxygen sensor for upstream placement
Non-heated sensor design
Threaded mounting type with 14.0 mm thread diameter
Radiused polygon male connector
3.07 wiring harness length with 20-gauge wire
Overall length: 6.61

Walker Products OE Line

Walker Products OE focuses on engine management and oxygen/air-fuel sensors engineered for direct replacement use. Part number 250-21030 is built for the listed application and position, helping maintain the diagnostic signal the ECU expects from the upstream sensor on 1994 Saturn SC2, SL2, and SW2 models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

Check engine light related to upstream oxygen sensor faults
Poor engine performance caused by incorrect exhaust feedback
Increased fuel consumption from inaccurate air-fuel readings
Higher exhaust emissions from a failing sensor
Stored ECU fault codes tied to the sensor circuit

Installation Notes

Verify the connector shape, thread diameter, and upstream position before installation. Inspect the sensor wiring harness and connector for physical damage, since damaged wiring can shorten service life and affect sensor output. Confirm the vehicle is a 1994 Saturn SC2, SL2, or SW2 with California-ESV emissions equipment before ordering.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates under ISO 9001/TS 16949 quality systems. Part number 250-21030 is produced as an OE replacement for the specified application and fitment position.

This part fits 6 vehicles

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

Year	Make	Model	Liters	Cylinders	Fuel Type	Position	Notes
1994	Saturn	SC2	1.9L	L4	GAS	Upstream	Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
1994	Saturn	SC2	1.9L	L4	GAS	Upstream	California emissions ESV vehicles oxygen sensor; Walker Products OE
1994	Saturn	SL2	1.9L	L4	GAS	Upstream	Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
1994	Saturn	SL2	1.9L	L4	GAS	Upstream	California emissions ESV vehicles oxygen sensor; Walker Products OE
1994	Saturn	SW2	1.9L	L4	GAS	Upstream	Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE
1994	Saturn	SW2	1.9L	L4	GAS	Upstream	California emissions ESV vehicles oxygen sensor; Walker Products OE
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