O2 Oxygen Sensor Upstream Downstream for Kia Sorento (2007-2009) 3.3L 3.8L

Direct-Fit O2 Sensor Kit for 2007-2009 Kia Sorento (BL)

What it Does: This 4-piece oxygen sensor kit monitors exhaust oxygen levels on the BL 2007-2009 Kia Sorento (G6DB 3.3L / G6DA 3.8L) so the ECM can regulate fuel trims and catalyst efficiency.

The Stock Kia Sorento Sensor Failure

On the BL Sorento, factory oxygen sensors endure severe thermal cycling, moisture, and exhaust soot inside the Bank 1 and Bank 2 exhaust manifolds. Over time, zirconia sensing elements crack from thermal shock while internal heater circuits burn out from prolonged heat soak on the G6DB 3.3L and G6DA 3.8L V6 engines. Sluggish voltage switching forces open-loop fueling and triggers P0133, P0153, P0135, or downstream catalyst codes P0420 and P0430.

Common Symptoms of a Failing OEM Oxygen Sensor

• Check Engine Light / DTCs: Triggers P0133, P0135, P0153, or catalyst faults P0420/P0430.
• Rich Fueling: Open-loop fueling causes tailpipe soot, fuel odor, and spark plug fouling.
• Drivability Loss: Hesitation under load, poor mileage, and failed OBD-II emissions readiness.

The Direct-Fit Zirconia O2 Sensor Solution

Replacing all four sensors as a matched set restores balanced Bank 1 and Bank 2 closed-loop fuel control across upstream and downstream positions. Each sensor uses a laser-welded stainless steel housing, porous shield, and fast-light-off ceramic heater element built to resist exhaust moisture and thermal fatigue. Direct-fit harnesses and factory connectors provide plug-and-play installation matching 392103C300, 392103C800, 392103C900, 392103C920, 392103C820, 392103C830, and 392103C860 with zero splicing.

What's Included

• 2 Upstream Oxygen Sensors
• 2 Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2008-2009 Kia Sorento 3.3L (G6DB) — Upstream & Downstream
• 2007-2009 Kia Sorento 3.8L (G6DA) — Upstream & Downstream

Frequently Asked Questions & Fitment Warnings

Does this fit the BL Sorento?

Yes. Direct fit for 2008-2009 Sorento G6DB 3.3L and 2007-2009 Sorento G6DA 3.8L. Excludes 2007 3.3L and 3.5L engines; confirm engine before ordering.

Will this clear P0133/P0135 or P0420/P0430 codes?

Yes, if sensor-related. Upstream units fix P0133/P0153/P0135 faults; downstream units clear P0420/P0430 unless the converter substrate failed.

Is any splicing required for installation?

No. Direct-fit OEM connectors plug into factory harnesses; inspect bung threads and torque to spec.

The Kia Precision Standard

Built for emissions precision and accurate ECM feedback on the BL platform. Replacing all four sensors restores closed-loop fueling and CEL-free operation.