BELKEBIR Oxygen Sensor Pair for 2007-2011 Honda Civic 1.8L — Upstream & Downstream O2 Sensors, OEM Fit

If your Civic is running rich or lean, triggering a check engine light or failing emissions checks, a worn oxygen sensor pair can be the root cause. This BELKEBIR 2-piece set includes both the upstream (front) and downstream (rear) sensors built to match the form, fit and electrical characteristics of the original equipment for 2007–2011 Honda Civic DX, EX, EX-L, LX and LX-S models with the 1.8L L4 engine.

How do these replacement O2 sensors fit my specific Civic?

Each sensor is manufactured to the OEM footprint and connector shape so installation is straightforward for the compatible model years listed. Confirm your vehicle’s chassis year and engine code before ordering to ensure correct match.

• Fits Honda Civic 2007–2011 with 1.8L L4 (DX, EX, EX-L, LX, LX-S)
• Upstream part numbers equivalent: 234-9124, 36531-RNA-J01 and related OE codes
• Downstream equivalents: 234-4350, 36532-RNA-A01 and matching OE references
• Connector and thread size designed to mirror factory sensor for drop-in replacement

What performance changes can I expect after installing these sensors?

Replacing faulty oxygen sensors helps your engine computer receive accurate exhaust oxygen data, allowing better air–fuel balancing. That can reduce rough idling, improve throttle response and restore fuel economy lost to sensor degradation.

• Improved fuel efficiency by enabling correct fuel trim adjustments
• Smoother acceleration and reduced hesitation during throttle input
• More consistent combustion that can lower visible emissions
• Quicker sensor response for more precise engine management

What are these sensors made of and how durable are they?

BELKEBIR sensors use durable ceramic sensing elements and platinum wiring to withstand high exhaust temperatures and corrosive conditions. Built with long-life materials, they’re intended to deliver steady performance over many miles under normal driving conditions.

• Ceramic sensing element for accurate oxygen voltage generation
• Platinum internal wiring resists oxidation at high temperatures
• Heat-resistant housing and protective sleeve to endure exhaust exposure
• Sealed design to reduce moisture and contamination ingress

How difficult is the installation and what should I prepare?

Installation is manageable for most DIYers with basic hand tools and safety precautions, though some vehicles may need brief vehicle lifting for access. If you’re not comfortable with automotive repair, a certified mechanic can complete the swap quickly using standard oxygen sensor tools.

• Typical tools: O2 sensor socket, ratchet, penetrating oil and jack stands if needed
• Allow engine and exhaust to cool before working to avoid burns
• Clear and secure electrical connectors to avoid wiring damage
• Reset engine codes after replacement or run readiness checks as required

Who is this for: This BELKEBIR sensor pair is intended for Honda Civic owners (2007–2011, 1.8L L4) who need a reliable upstream and downstream oxygen sensor replacement to restore engine efficiency and emissions performance. Choose this set if you want OE-compatible fitment, durable materials, and a simple route to resolving O2-related fault codes and drivability issues.