O2 Oxygen Sensor Upstream Downstream for Hyundai Azera Santa Fe (2010-2018) 3.3L 3.5L

Direct-Fit O2 Oxygen Sensor Kit for 2010-2018 Hyundai Azera,Santa Fe (HG/CM/DM)

What it Does: This 4-piece oxygen sensor kit replaces upstream and downstream sensors on the 2010-2018 Hyundai Azera and Santa Fe (HG, CM, DM) with G6DC 3.5L V6 and G6DH 3.3L V6 engines to restore closed-loop fuel trim precision.

The Stock Hyundai Azera,Santa Fe Sensor Failure

High exhaust temperatures, carbon fouling, and thermal cycling degrade the zirconia sensing element and internal heater circuits on factory HG, CM, and DM sensors. As the G6DH 3.3L V6 and G6DC 3.5L V6 age, sulfur deposits poison the platinum electrodes, causing sluggish 0.1V–0.9V switching. When heater resistance spikes or response drops, the ECM loses closed-loop control and logs P0133, P0153, or heater fault codes.

Common Symptoms of a Failing OEM Oxygen Sensor

• Check Engine Light / DTCs: Sluggish response or failed heaters trigger P0133, P0153, P0171/P0174, or P0420/P0430.
• Delayed Voltage Switching: Fouled electrodes slow fuel-trim corrections under load, causing hesitation and rough idle.
• Poor Fuel Economy & Emissions: Default open-loop fueling over-enriches exhaust, lowering MPG and failing emissions inspections.

The Direct-Fit Ceramic Oxygen Sensor Solution

This matched 4-sensor kit replaces OEM numbers 234-4456, 234-4458, 234-4571, and 234-4572 across both exhaust banks simultaneously. Each unit features a laser-welded stainless housing, ceramic zirconia element, and PTFE breather filter to resist moisture and thermal shock. Factory-length harnesses with OEM locking connectors deliver accurate ECM millivolt feedback and fast heater warm-up. Installing a matched set prevents bank-to-bank trim imbalances without splicing.

What's Included

• 2 Upstream Oxygen Sensors
• 2 Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2012-2017 Hyundai Azera (3.3L V6)
• 2010-2012 Hyundai Santa Fe (3.5L V6)
• 2013-2018 Hyundai Santa Fe (3.3L V6)

Frequently Asked Questions & Fitment Warnings

Does this fit the HG/CM/DM Azera,Santa Fe?

Yes. This is a direct fit for the 2010-2018 Hyundai Azera,Santa Fe equipped with the G6DH 3.3L V6 or G6DC 3.5L V6 engine. Excludes 4-cylinder models, 2019 Santa Fe XL, and Kia applications; confirm your engine displacement before ordering.

Will this clear P0133/P0153 or P0420/P0430 codes?

Yes, if sensors are faulty. Replacing all four restores upstream switching for P0133/P0153 and downstream monitoring for P0420/P0430 when catalytic converters remain healthy.

Are factory connectors included for plug-and-play installation?

Yes. All four sensors feature pre-terminated OEM plugs for direct bolt-in installation using a standard 22mm O2 socket.

The Hyundai Precision Standard

Engineered to restore factory ECM fuel-trim accuracy and eliminate persistent check engine lights across daily-driven V6 platforms. Precision ceramic elements maintain emissions compliance and dependable closed-loop operation.