O2 Oxygen Sensor Upstream Downstream for Acura TL CL (2000-2003) 3.2L

Direct-Fit O2 Oxygen Sensor Kit for 2000-2003 Acura TL,CL (UA5 / YA4)

What it Does: This upstream and downstream oxygen sensor kit monitors exhaust oxygen levels on the 2000-2003 Acura TL,CL (UA5 / YA4) J32A1 / J32A2 3.2L V6 to regulate closed-loop fueling and catalyst efficiency.

The Stock Acura TL,CL Sensor Drift & Heater Failure

On the UA5 and YA4 chassis with the J32A1 / J32A2 3.2L V6, factory sensors suffer extreme thermal cycling and exhaust carbon fouling. Over time, ceramic zirconia elements develop micro-cracks while internal heater coils burn out, triggering P0135 and P0141 open-circuit faults. Slow voltage switching (P0133) forces open-loop fuel enrichment, hurting MPG and accelerating catalyst wear.

Common Symptoms of a Failing OEM Oxygen Sensor

• Check Engine Light (DTCs): Codes P0135, P0141, or P0133 from heater failure or sluggish response.
• Fuel Trim Deviations: Skewed feedback triggering P0171/P0172, rough idle, and rich exhaust odor.
• Emissions & MPG Loss: Failed smog inspection, poor fuel economy, and catalytic converter overheating.

The Direct-Fit Heated Zirconia Oxygen Sensor Solution

Replacing both sensors as a matched pair restores crisp closed-loop fueling and post-catalyst monitoring. Laser-welded stainless housings, porous PTFE filters, and fast-response zirconia ceramic elements resist thermal shock and exhaust contamination. Direct-fit 4-wire harnesses and weatherproof connectors plug straight into the J32A1 / J32A2 3.2L V6 loom without splicing, replacing 234-4099, 234-4367, and 234-4355.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• 2000-2003 Acura TL 3.2L
• 2001-2003 Acura CL 3.2L

Frequently Asked Questions & Fitment Warnings

Does this fit the UA5 / YA4 TL,CL?

Yes. Direct fit for 2000-2003 Acura TL (UA5) and 2001-2003 CL (YA4) J32A1 / J32A2 3.2L V6 engines. Excludes Honda Accord 3.0L and Civic.

Will this clear P0135 or P0141 codes?

Yes. Fresh zirconia elements and heaters resolve P0135, P0141, and P0133 faults when wiring and exhaust seals are intact.

Are connectors plug-and-play for installation?

Yes. Direct-fit plugs replace 234-4099, 234-4367, and 234-4355 without splicing; torque properly into clean bungs.

The Acura Precision Standard

Built for JDM V6 responsiveness, this matched sensor kit restores crisp throttle response and optimal air-fuel flow efficiency. Keep your UA5 or YA4 operating cleanly with reliable ECU feedback.