Denso 234-4132 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4132

This Denso OE Style oxygen sensor is a direct-fit, heated downstream replacement built for specific Subaru applications. It is engineered for accurate exhaust feedback, stable engine management, and a first-time fit on the listed Subaru Baja, Legacy, and Outback models.

The Denso 234-4132 is built to OE-style dimensions and connector layout, with a threaded mounting design, 4-wire configuration, female connector, and 18.11-inch wiring harness length. This part cross-references Bosch 15814 and NTK 24598 for the same application.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for listed Subaru applications
• 4-wire, female connector configuration
• Threaded mounting with 0.708-inch thread diameter
• 18.11-inch wiring harness length for proper routing
• OE Style replacement built to match factory fit and function

OE Style Construction

Denso’s OE Style line is built around exact replacement fitment for vehicles that require a direct-match sensor. The sensor uses precision-built components and Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting consistent exhaust signal quality and long service life. For Subaru owners searching for a downstream oxygen sensor for 1999-2006 Subaru Legacy, 2000-2003 Subaru Outback, or 2003-2006 Subaru Baja, the Denso 234-4132 is a direct-fit option.

What This Sensor Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings sent to the engine control system
• Reduced fuel economy caused by a failing sensor
• Rough or inconsistent engine performance from inaccurate feedback
• Emissions test failures tied to sensor response issues

Installation Notes and Fitment

• Fits 2003-2006 Subaru Baja, Downstream, OE Style
• Fits 2004 Subaru Legacy, Downstream, Canada & Exc. Calif.; OE Style
• Fits 2004 Subaru Outback, Downstream, Canada & Exc. Calif.; OE Style
• Fits 1999-2003 Subaru Legacy, Downstream, OE Style
• Fits 2000-2003 Subaru Outback, Downstream, OE Style
• Fits 1999 Subaru Legacy, Downstream, Excluding California.; OE Style

Verify the connector style, thread size, and downstream location before installation. The specific-fit design helps simplify replacement on Subaru Legacy, Subaru Outback, and Subaru Baja applications listed above. The Denso 234-4132 is intended for direct replacement where the original sensor uses the same OE-style configuration.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and consistent performance. The brand’s OE-style engineering focus supports proper fitment, dependable signal output, and long-term durability in the listed Subaru applications.