BELKEBIR Oxygen Sensor Kit for 2007-2011 Honda Civic 1.8L L4 — Upstream & Downstream Pair

A matched pair of upstream and downstream BELKEBIR oxygen sensors engineered to replace factory O2 sensors on 2007–2011 Honda Civic 1.8L L4 models for reliable emissions monitoring and restored engine performance.

This BELKEBIR two-piece oxygen sensor kit includes both the upstream (pre-cat) and downstream (post-cat) sensors designed as direct replacements for OE numbers such as 234-9124, 234-4350, 36531-RNA-J01 and 36532-RNA-A01. Each sensor is manufactured with durable materials and calibrated to provide accurate air/fuel feedback to the engine computer. Whether you’re troubleshooting a check engine light, fixing a drivability issue, or simply servicing an older Civic, these sensors are sized and wired to simplify installation and bring emissions readings back to specification.

How will these sensors affect my Civic’s drivability?

Replacing failing oxygen sensors often restores smoother idle, crisper throttle response, and steadier acceleration by returning correct oxygen readings to the ECU. The upstream sensor helps the engine maintain the correct air/fuel ratio, while the downstream sensor verifies catalytic converter efficiency.

• Upstream sensor (pre-cat) provides real-time air/fuel data to the ECU.
• Downstream sensor (post-cat) monitors catalytic converter performance.
• Accurate readings reduce hesitation, surging, and rough idling.
• Direct-fit connectors and thread sizes minimize installation errors.

Are these BELKEBIR sensors compatible with my 2007–2011 Honda Civic?

These sensors are manufactured to match the fit and electrical connections for Civic DX, EX, EX-L, LX and LX-S 1.8L L4 variants produced between 2007 and 2011. Cross-referenced OE part numbers are provided so you can confirm compatibility before purchase.

• Fits 2007–2011 Honda Civic 1.8L L4 models (DX, EX, EX-L, LX, LX-S).
• Replaces OE numbers 234-9124 (upstream) and 234-4350 (downstream).
• Included part numbers like 36531-RNA-J01 and 36532-RNA-A01 for verification.
• Check your vehicle’s year, engine code, and existing sensor connector before ordering.

What materials and performance should I expect from these replacements?

BELKEBIR sensors are constructed with durable ceramic sensing elements and platinum-coated junctions to resist high temperatures and prolonged exhaust exposure. The result is a robust sensor that delivers repeatable voltage signals for the engine control unit and sustained service life under normal driving conditions.

• Platinum and ceramic internal construction for high-temperature durability.
• Stable sensor output to support accurate engine tuning and emissions control.
• Corrosion-resistant housing and gasket to protect the sensor thread area.
• Designed to meet typical OE performance and fitment standards.

How difficult is the installation process for these O2 sensors?

Installation is straightforward for anyone familiar with basic automotive maintenance and common hand tools. The sensors use standard threaded fittings and vehicle-specific connectors for a direct swap; some jobs may require an oxygen sensor socket or penetrating lubricant to remove the old unit.

• Direct-fit electrical plug matches factory harness—no splicing required.
• Threaded installation fits existing bung on the exhaust system.
• Typical tools: socket set, oxygen sensor socket, penetrating oil, jack stands.
• Allow warm-down time and follow torque specs to avoid damage.

Who is this for: This BELKEBIR two-sensor kit is intended for DIY mechanics, independent repair shops, and Civic owners seeking an OE-style replacement for failing or aged oxygen sensors on 2007–2011 Honda Civics with the 1.8L L4 engine. If you want to resolve emissions-related fault codes, improve fuel feedback to the engine, or restore smoother running without expensive dealer pricing, this matched upstream and downstream set is a practical, cost-effective choice. Always confirm your vehicle’s model year and existing part numbers before purchase to ensure proper fitment.