Denso Oxygen Sensor 234-4574 direct-fit replacement - OE connector, US-made

The Denso 234-4574 Oxygen Sensor is a direct-fit replacement lambda sensor designed to monitor exhaust oxygen levels and help your vehicle maintain efficient engine operation.

This original-equipment-style sensor from Denso measures the oxygen content in exhaust gases and sends that information to the engine control module (ECM). The ECM uses that data to adjust air–fuel ratios, which supports stable idling, smoother throttle response and consistent combustion. Built to Denso specifications in the United States, the 234-4574 arrives in compact packaging for quick install and minimal handling.

How does this sensor fit my vehicle and installation process?

The 234-4574 is manufactured as a direct-replacement oxygen sensor and follows Denso’s OE connector and thread specifications, so it typically bolts into the existing sensor port without modification. Installation requires basic hand tools and access to the exhaust port where the original sensor is located. Always verify compatibility with your vehicle’s year, make and model before ordering.

• Direct-fit design matching OE connector and thread
• Standard sensor wiring harness for most compatible vehicles
• Compact package dimensions: 4.6 L x 15.2 H x 5.6 W cm
• Lightweight for easy handling: 0.115 kg package weight

What measurable benefits can I expect from replacing the oxygen sensor?

Replacing a worn or faulty oxygen sensor restores accurate exhaust oxygen readings to the ECM, enabling better control of the engine’s air–fuel mixture. While outcomes depend on the vehicle’s overall condition, a functioning sensor supports consistent combustion and can help the engine run as intended. It’s a component-level replacement rather than a performance part.

• Restores accurate oxygen measurement to the ECM
• Supports stable idling and consistent engine response
• Contributes to the engine’s designed fuel-management strategy

What are the product specifications and origin details?

The Denso 234-4574 ships in a compact, lightweight package and meets Denso’s quality standards. It lists precise packaging dimensions and weight for shipping and storage, and it is produced in the United States. These specifics help when planning installation, returns or part inventory.

• Package dimensions: 4.6 L x 15.2 H x 5.6 W centimeters
• Package weight: 0.115 kilograms
• Country of origin: United States
• Manufacturer: Denso, an OE supplier

How do I verify compatibility before purchase?

Confirm compatibility by checking your vehicle’s parts catalog, the OEM part number cross-reference or your service manual. You can also compare the connector style and thread pitch of the existing sensor to ensure a proper direct-fit replacement. When in doubt, consult a technician or Denso’s fitment guides.

• Compare OEM part numbers or vehicle fitment charts
• Verify connector style and thread dimensions
• Contact a technician or use Denso’s compatibility resources

Who this is for: The Denso 234-4574 is intended for vehicle owners, DIY mechanics and professional technicians seeking a reliable direct-replacement oxygen sensor that meets OE-style specifications. It’s suitable for anyone requiring a compact, lightweight sensor made by an established OEM supplier and manufactured in the United States. Choose this part when you need a like-for-like sensor swap to restore accurate exhaust oxygen readings and support the vehicle’s fuel-management system.