A-Premium Downstream O2 Oxygen Sensor for Honda & Acura — 4-Blade Heated, Direct-Fit (Rear)

A-Premium downstream O2 oxygen sensor is a direct-fit, 4-blade heated replacement engineered to restore accurate exhaust oxygen readings on many Honda and Acura V6 and some L4 models.

This downstream (rear) oxygen sensor is built for owners and technicians who need a reliable plug-and-play replacement without modifying harnesses or exhaust hardware. It uses a heated sensing element and a threaded mount for straightforward installation and includes a 4-blade (4-terminal) connector to match factory wiring. The part is matched to common OEM reference numbers, making it suitable across numerous model years and trims for both Acura and Honda vehicles.

Which vehicles and positions does this A-Premium sensor fit?

The sensor supports multiple downstream positions (rear and some front/rear applications depending on year and model). Compatibility covers a broad list of Acura MDX, RDX, RL, TL, TLX, ZDX and Honda Accord, Crosstour, Odyssey, Pilot, Ridgeline, Passport and more, across various years and engine sizes.

• Fits downstream rear applications for many 3.5L and 3.7L V6 Acura/Honda models (MDX, RLX, RDX, TLX, TL, ZDX).
• Covers downstream front or rear positions on earlier MDX, RL and TL model years and selected TSX models.
• Includes newer model coverage such as RDX 22–23 L4 and Accord 22 L4 where listed.
• Reference numbers matched: 36542-R70-A01, 250-24785 and 2344461 for easier cross-checking.

How does this sensor help performance and diagnostics?

As a downstream sensor, it monitors the catalytic converter’s efficiency and helps the vehicle’s ECU verify emissions control. Replacing a failing sensor can clear emission-related fault codes and ensure the engine management system has correct feedback for long-term adjustments.

• Heated element speeds warm-up for quicker, stable readings after cold starts.
• Accurate feedback aids catalytic converter monitoring and emissions diagnostics.
• Four-terminal connector matches factory harnesses to avoid splicing.

What are the technical specs and installation details?

The A-Premium sensor is a threaded, heated oxygen sensor with a male connector and a 4-blade terminal configuration. It ships singly in a protective box and is intended to be installed in the downstream position specified for each vehicle; basic hand tools and an oxygen sensor socket are usually sufficient for replacement.

• Terminal quantity: 4-blade (4-pin) male connector for direct-fit wiring.
• Sensor type: heated zirconia-style oxygen sensor for reliable response.
• Mounting type: threaded—fits factory sensor ports without adapters.
• Package: one oxygen sensor, boxed for shipping protection.

Can I swap this sensor myself or should a shop install it?

Many owners with basic mechanical skills can replace an oxygen sensor using an oxygen-sensor socket and standard hand tools. However, ease depends on vehicle ground clearance and sensor accessibility; seized sensors or corroded threads may require penetrants, heat, or professional tools.

• Typical DIY time: 30–90 minutes depending on access and rust.
• Use anti-seize on threads only if recommended by the installer; avoid contaminating the sensing tip.
• After replacement, clear codes and perform a short drive cycle to confirm correct operation.

Who is this for: This A-Premium downstream O2 sensor is intended for vehicle owners, independent mechanics, and repair shops seeking a cost-effective, direct-fit replacement for downstream oxygen sensing on compatible Honda and Acura models. Choose this sensor if you need a heater-equipped, threaded unit with a 4-blade connector that matches common OEM reference numbers and aims to restore proper emissions monitoring and ECU feedback without wiring changes.