Walker 250-21070 Oxygen Sensor - Upstream

Walker OE Oxygen Sensor for Suzuki Swift

Walker Products OE 250-21070 is a specific-fit oxygen sensor engineered for upstream placement on select Suzuki Swift applications. It is built to provide ECU feedback for air-fuel monitoring, helping maintain proper engine management on 1989 and 1993-1994 Swift models.

Walker Products OE focuses on original-equipment-style replacement sensors for vehicle-specific fitment and diagnostic response. For Suzuki Swift oxygen sensor replacement, this part number 250-21070 is matched to the upstream position and uses a threaded mounting design with a female connector.

Key Features

• Specific-fit oxygen sensor for upstream installation
• Fits 1989 Suzuki Swift, upstream
• Fits 1993-1994 Suzuki Swift, upstream
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• 15.28 in. wiring harness length and 20-gauge wire
• Radiused polygon connector shape with female terminal
• Overall length: 18.82 in.

Detailed Description

Walker Products OE 250-21070 is an oxygen sensor for upstream engine management feedback on select Suzuki Swift models. It is designed for the Bank 1 Sensor 1 location where the ECU relies on sensor input to monitor exhaust oxygen content and adjust fuel control. This makes it a direct-fit choice for drivers searching for a 1989 Suzuki Swift upstream oxygen sensor or a 1993-1994 Suzuki Swift front oxygen sensor replacement.

Walker Products OE is the brand line for OE-style replacement sensors and related engine management components. The line is built around application-specific fitment, so the connector, harness length, mounting style, and sensor configuration align with the intended vehicle position. Part number 250-21070 is a non-heated oxygen sensor with a threaded mount and female connector.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 1989 Suzuki Swift or a 1993-1994 Suzuki Swift with an upstream Bank 1 Sensor 1 oxygen sensor requirement before ordering. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation, since damaged wiring can shorten sensor life and affect signal quality. Verify the threaded mounting size and connector style match the original unit.

Quality Assurance

Walker Products is an automotive ISO 9001/TS 16949 certified company with a long history in engine management and fuel system components. Part number 250-21070 is manufactured as an OE-style replacement sensor for the specified application and position.