Maxfavor O2 Oxygen Sensor 2-Pack (Upstream & Downstream) Direct-Fit 234-4012 for 1996–2001 GM & Late‑90s Honda

Maxfavor 2Pcs 234-4012 upstream and downstream oxygen sensors replace worn O2 sensors to restore accurate exhaust readings and help your engine run more efficiently.

If your vehicle's check engine light points to an oxygen sensor fault or you suspect poor fuel economy and rough idling, these two Maxfavor O2 sensors are engineered as direct-fit replacements for many 1996–2001 GM and late‑90s/2000 Honda and Isuzu models. The set includes one upstream (pre-catalytic converter) and one downstream (post-catalytic converter) sensor, built to match common OE references so installation is straightforward when the correct fit is confirmed.

Which vehicles and years do these sensors fit?

These sensors are made to replace factory parts on a range of Chevrolet, GMC, Oldsmobile, Pontiac, Acura, Honda and Isuzu models from the mid‑1990s to early‑2000s. Always verify fitment against your VIN, the original sensor, or the OE numbers listed here before ordering.

• Common fitments include: Chevy Blazer/S10 (1996–2001), Impala/Caprice (1996), GMC Sonoma/Jimmy (1996–2001)
• Also fits: Acura SLX (1996–1999), Isuzu Amigo/Hombre/Rodeo/Trooper (1996–2003), Oldsmobile Bravada (1996–2001)
• Compare part images and OE numbers 234-4012, 15703, 19178918, 19178930, 19178937, 21006 before purchase

What OE numbers and references does this 2‑pack replace?

Maxfavor lists a set of equivalent manufacturer references so you can match the new sensors to the original equipment on your vehicle. These cross‑references help ensure you order the correct replacement parts.

• Primary cross-reference: 234-4012 (also shown as 2344012)
• Additional OEM numbers: 15703, 19178918, 19178930, 19178937, 21006, 24626 and others in the product listing
• Useful when checking aftermarket and dealer catalogs for compatibility

How do I install these oxygen sensors and what should I watch for?

Installation is intended to be a direct swap if the connector and thread match the original sensor. Basic hand tools and an O2 sensor socket make the job easier, but take care to avoid damaging the sensor harness or threads.

• Step 1: Locate upstream and downstream sensor positions and remove old sensors with an O2 socket
• Step 2: Verify new sensor matches old sensor length, connector and threads before fitting
• Step 3: Clean threads, hand‑start the sensor, then torque gently to specification and reconnect the wiring
• Step 4: Clear any diagnostic trouble codes after installation and test drive to confirm proper operation

What are the construction and warranty details?

Each Maxfavor sensor is built from corrosion‑resistant materials designed for long service life under exhaust system conditions. The product carries a 1‑year unlimited‑miles warranty and Maxfavor supports returns when the part does not match your vehicle.

• Durable materials intended to withstand exhaust heat and contaminants
• Sold as an upstream + downstream two‑piece set for complete replacement
• 1‑year unlimited miles warranty and return acceptance if fitment is incorrect

Who is this for? Drivers and independent mechanics who own or service late‑1990s to early‑2000s GM, Isuzu, Honda and Acura SUVs/trucks and need a matched upstream and downstream O2 sensor pair for diagnostics, emissions troubleshooting or to improve engine responsiveness. If you want a cost‑effective direct‑fit aftermarket set, verify your vehicle year/model and OE numbers, then install using standard O2 sensor tools or consult a trusted technician.