SDYYDS Oxygen Sensor Kit for 2006–2015 Honda Civic 1.8L L4 — 2-Piece Upstream & Downstream O2 Sensors, Direct-Fit

If your Civic’s check engine light points to oxygen sensor faults, this matched upstream and downstream pair from SDYYDS is engineered as a direct-fit replacement for the 2006–2015 1.8L L4 models. The kit includes both part numbers commonly referenced for this application, offering plug-and-play wiring, OE-compatible performance, and a one-year warranty for peace of mind. These sensors help the engine control module measure exhaust oxygen content so the fuel trim can be adjusted efficiently.

How will these sensors fit my 2006–2015 Honda Civic 1.8L?

Each sensor is designed to match the original equipment dimensions and electrical connector style used on the specified Civic years and engine. They install in the same upstream and downstream locations without cutting or splicing the factory harness.

• Direct-fit replacements for upstream (pre-catalyst) and downstream (post-catalyst) positions
• Interchange part numbers: 234-9124 (upstream) and 234-4350 (downstream)
• Compatible with 2006–2015 Honda Civic 1.8L L4 models
• Plug-and-play connectors match factory harness—no modifications needed

What performance characteristics can I expect from this SDYYDS O2 sensor pair?

These sensors are built to provide reliable voltage and resistance responses consistent with OE behavior, helping the ECU maintain appropriate fuel mixture and catalytic converter operation. While sensors don’t increase horsepower, correct readings support efficient combustion and emission control.

• OE-style response profiles for accurate air-fuel feedback
• Durable construction intended for typical exhaust conditions
• Improves the ECU’s ability to adjust fuel trims and idle stability
• Manufactured and tested for consistent electrical characteristics

How easy is installation and what precautions should I take?

Installation is straightforward for anyone with basic mechanical skills and common hand tools; the sensors are plug-and-play so you replace each sensor one-for-one. Observe standard safety steps like working on a cooled exhaust and using anti-seize where applicable.

• Remove old sensor, unplug factory connector, and install new sensor in the same orientation
• Use a proper oxygen sensor socket or wrench for removal and tightening
• Ensure threads are clean; apply anti-seize if manufacturer instructions recommend it
• Clear any diagnostic trouble codes after installation to verify the repair

What warranty and support come with the SDYYDS sensor set?

The kit includes a one-year warranty against manufacturing defects and seller support to assist with fitment questions or issues. SDYYDS commits to responding within 24 hours for customer service inquiries to help troubleshoot or replace items when needed.

• 1-year limited warranty from SDYYDS
• Customer support reply promised within 24 hours
• Service guarantee for fitment guidance and post-sale assistance
• Documentation of interchange part numbers to simplify returns or diagnostics

Who is this for: This SDYYDS two-piece oxygen sensor kit is aimed at DIY mechanics, independent shops, and Honda Civic owners (2006–2015 with the 1.8L L4 engine) who need a reliable upstream and downstream replacement that fits like OE, restores correct exhaust sensing, and comes with seller support and a one-year warranty. If you’re troubleshooting O2-related codes or replacing aging sensors, this kit provides the matched components required for a full repair.