Denso 234-4618 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4618

Denso 234-4618 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is made for downstream use on select Saturn models and supports accurate exhaust feedback for consistent engine operation.

Key Features

• OE Style replacement oxygen sensor from Denso
• Heated sensor design with 4-wire configuration
• Specific fit for direct application matching
• Female connector with threaded mounting type
• Wiring harness length: 27.80
• Thread diameter: 0.708

Product Details

Denso 234-4618 is manufactured and tested to OE standards for precise fit and dependable performance. The sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable engine performance and fuel efficiency over time. This part cross-references Bosch 13055 and NTK 21538 for the same application. It is a direct replacement for downstream oxygen sensor service on 1996-1999 Saturn SC1, Saturn SC2, Saturn SL, Saturn SL1, Saturn SL2, Saturn SW1, and Saturn SW2.

What This Sensor Helps Address

• Check engine light caused by a failing downstream oxygen sensor
• Rough or inconsistent fuel control from inaccurate exhaust readings
• Reduced fuel economy linked to worn sensor response
• Slow sensor switching or degraded exhaust feedback
• OE-style replacement needs on Saturn SC1, SC2, SL, SL1, SL2, SW1, and SW2 models

Installation Notes and Tips

• Compatible With 1996-1999 Saturn SC1, downstream
• Compatible With 1996-1999 Saturn SC2, downstream
• Compatible With 1996-1999 Saturn SL, downstream
• Compatible With 1996-1999 Saturn SL1, downstream
• Compatible With 1996-1999 Saturn SL2, downstream
• Compatible With 1996-1999 Saturn SW1, downstream
• Compatible With 1996-1999 Saturn SW2, downstream
• Verify connector style, thread diameter, and harness length before installation
• Use the threaded mounting point and specific-fit design for direct replacement service

Quality Assurance

Denso builds this OE Style oxygen sensor to strict original-equipment standards and tests each unit for replacement accuracy and fit consistency. The design focuses on reliable sensor response and long service life in demanding exhaust conditions.