BELKEBIR Oxygen Sensor Kit for 2007-2011 Honda Civic 1.8L — Upstream & Downstream Direct-Fit

BELKEBIR's two-piece oxygen sensor kit supplies both upstream and downstream O2 sensors engineered as direct replacements for 2007–2011 Honda Civic 1.8L (DX/EX/LX) engine systems.

If your Civic is showing a check-engine light, running roughly, or failing emissions checks, replacing both oxygen sensors often restores accurate air–fuel monitoring and brings the engine management system back into balance. This pair is designed to match the original equipment fitment and electrical characteristics for the specified model years, simplifying installation and reducing diagnostics time.

Will these sensors fit my 2007–2011 Honda Civic 1.8L?

Yes — the kit is manufactured to match OE mounting, thread pitch, and connector style for Civic 1.8L L4 models listed in the compatibility range. Always verify your vehicle’s year, trim, and engine code before ordering to ensure proper match.

• Fits 2007–2011 Honda Civic DX, EX, EX-L, LX, LX-S 1.8L L4 models
• Upstream replaces OE numbers including 234-9124 and 36531-RNA-J01
• Downstream replaces OE numbers including 234-4350 and 36532-RNA-A01
• Direct-fit design for the factory sensor location and connector

How do these O2 sensors improve vehicle performance?

Oxygen sensors send critical exhaust composition data to the engine control unit so it can adjust fuel injection and ignition timing. Fresh, accurate sensors help the ECU maintain more consistent combustion, which can improve throttle response and reduce rough idling compared with degraded sensors.

• Restores accurate air–fuel ratio feedback to the ECU
• Improves throttle smoothness and engine responsiveness
• Helps stabilize idle and reduce engine hesitation
• Supports cleaner emissions by enabling correct fuel trims

What are the build and material specifications of these sensors?

The BELKEBIR sensors are constructed with durable internal elements and heat-resistant housings to match the operating demands of modern exhaust systems. Materials and assembly are chosen to withstand high exhaust temperatures and deliver consistent voltage signals over time.

• Precise ceramic sensing element for reliable O2 detection
• Platinum-grade contacts for stable signal conduction
• Heat-tolerant protective shroud and sealing to prevent contamination
• Pre-terminated connector and pigtail matching factory wiring

How easy is the installation and what should I prepare?

Installation is straightforward for anyone with basic automotive tools. The sensors thread into the exhaust manifold and downstream pipe in the factory locations; wiring plugs directly into the OEM harness. Use anti-seize on the threads if reinstalling or when specified, and follow torque specifications for proper sealing.

• Standard oxygen sensor socket or 7/8" (22mm) wrench required
• Disconnect battery before electrical connection work
• Allow exhaust to cool to avoid burns during removal/installation
• Clear diagnostic codes or run an OBD-II scan after replacement

Who is this for? This two-piece BELKEBIR O2 sensor kit is intended for Honda Civic owners, independent mechanics, and DIY enthusiasts who need direct-fit upstream and downstream sensors for 2007–2011 1.8L models. It’s suited to anyone replacing aging sensors to restore proper engine control, prepare a vehicle for inspection, or improve drivability after oxygen-sensor related faults. Confirm your vehicle’s year and engine before purchase to ensure compatibility, and consult a repair manual or technician for torque specs and diagnostic steps when needed.