Genuine Denso Oxygen Sensor 234-4122

Ensure optimal fuel efficiency and emissions compliance with the Denso Oxygen Sensor 234-4122 (SKU 22-294). This premium OEM-quality oxygen sensor is engineered by Denso to accurately measure exhaust oxygen content and provide critical feedback to the engine control unit, ensuring optimal air-fuel ratio, maximum fuel efficiency, and emissions control. Designed for Honda Civic ES/EU with D17A2/D17Z1 engines and Honda Integra DC with K20A2/K20A3/K20Z1 engines, this sensor ensures dependable engine management system performance and long service life for your Honda.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

Key Features & Benefits

• Genuine Denso Quality - OEM-grade component built to exacting standards
• Honda Civic & Integra Application - Fits Civic ES/EU and Integra DC models
• Multiple Engine Compatibility - Supports D17A2, D17Z1, K20A2, K20A3, K20Z1 engines
• Precise O2 Measurement - Accurately measures exhaust oxygen content
• Optimal Air-Fuel Ratio - Ensures correct fuel mixture for all conditions
• Maximum Fuel Economy - Precise feedback maximizes fuel efficiency
• Emissions Compliance - Maintains proper emissions control system operation
• Catalytic Converter Protection - Prevents rich running that damages catalysts
• Reliable Operation - Consistent performance in all conditions
• Long Service Life - Durable construction for extended reliability

Technical Specifications

• Denso Part Number: 234-4122
• SKU: 22-294
• Component Type: Oxygen Sensor (O2 Sensor / Lambda Sensor)
• Primary Application: Honda Civic ES/EU, Honda Integra DC
• Weight: 0.2 kg (approximate)

Vehicle Compatibility

This Denso oxygen sensor is compatible with the following Honda models and engines:

Honda Civic:

• Honda Civic ES (D17A2 engine)
• Honda Civic ES (D17Z1 engine)
• Honda Civic EU (D17A2 engine)
• Honda Civic EU (D17Z1 engine)

Honda Integra:

• Honda Integra DC (K20A2 engine)
• Honda Integra DC (K20A3 engine)
• Honda Integra DC (K20Z1 engine)

Always verify fitment for your specific vehicle and engine configuration.

CLICK HERE TO CHECK IF THIS FITS YOUR VEHICLE.

OEM Part Number Cross-Reference

This Denso oxygen sensor replaces the following OEM part numbers:

• 234-4122 (Denso)
• 36531PLRA01 (Honda)
• 36532PNDA01 (Honda)
• 36532PRBA11 (Honda)
• 36532PRBA01 (Honda)
• EGO-294 / EGO294

Common Symptoms of Faulty Oxygen Sensors

• Check engine light with O2 sensor codes (P0130, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0139, P0140, P0141)
• Poor fuel economy
• Rich or lean running condition
• Rough idle or engine hesitation
• Failed emissions test
• Black smoke from exhaust (rich condition)
• Catalytic converter damage from prolonged rich running
• Loss of power during acceleration
• Engine stumbling or misfiring

What Does an Oxygen Sensor Do?

The oxygen sensor (also known as an O2 sensor or lambda sensor) is a critical component of your vehicle's engine management and emissions control system. Mounted in the exhaust system, the sensor measures the amount of oxygen remaining in the exhaust gases after combustion. The engine control unit (ECU) uses this real-time data to continuously adjust the fuel injection system to maintain the ideal air-fuel ratio (stoichiometric ratio of 14.7:1 for petrol engines). Upstream (pre-cat) sensors provide primary feedback for fuel control, while downstream (post-cat) sensors monitor catalytic converter efficiency. A properly functioning oxygen sensor is essential for optimal fuel economy, emissions compliance, and catalytic converter longevity.

Why Choose Genuine Denso Oxygen Sensors?

Genuine Denso oxygen sensors are designed to meet or exceed original equipment specifications, ensuring accurate exhaust gas measurement, reliable operation, and long service life. As a world-leading automotive supplier and original equipment manufacturer for Honda and other major automakers, Denso engine management components are built to exacting standards with precision engineering and quality materials. Using genuine Denso oxygen sensors ensures proper fitment, maintains your vehicle's engine management system integrity, and provides the reliability you need for worry-free driving.

Installation Notes

Professional installation is recommended for best results. Oxygen sensor replacement requires disconnecting the battery, locating the sensor in the exhaust system, disconnecting the electrical connector, and carefully removing the old sensor using an oxygen sensor socket. Apply anti-seize compound to the threads of the new sensor (if not pre-applied). Install the new sensor and torque to manufacturer specifications (typically 40-55 Nm). Reconnect the electrical connector. Clear any diagnostic trouble codes and allow the engine to reach operating temperature to complete the sensor's closed-loop learning cycle. Test drive to verify proper operation and fuel economy improvement.

Why Choose LM15 Motorsport?

We supply genuine Denso engine management components with fast shipping across Australia. Every oxygen sensor is carefully inspected to ensure you receive an authentic Denso component for reliable engine management system performance. Our team has extensive experience with Honda vehicles and can provide expert advice on engine management system maintenance and troubleshooting.

Need help with fitment or installation? Contact our expert team for advice specific to your Honda Civic ES/EU D17A2/D17Z1 or Integra DC K20A2/K20A3/K20Z1 oxygen sensor requirements.