Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on OEM Hyundai/Kia EPC listings and verified aftermarket cross-reference data, part number 29640-2FRF0 is a NOx sensor used in Hyundai/Kia Euro 6 diesel SCR (AdBlue) systems, mainly on 2.0 CRDi / 2.2 CRDi diesel SUV platforms (Santa Fe / Sorento generation depending on SCR calibration and market variant).

Confirmed applications include:

• Hyundai Santa Fe IV (TM / TMA) 2.0 CRDi Euro 6 SCR
• Kia Sorento III (UM) 2.0 / 2.2 CRDi Euro 6 SCR
• Hyundai/Kia shared SCR diesel SUV architecture

Fitment is strictly based on OE number matching:
29640-2FRF0

📌 Verified evidence:

• OEM replacement listings confirm 29640-2FRF0 is a Hyundai/Kia NOx sensor assembly used in SCR exhaust systems (SNS0812A family equivalent in multiple listings)
• Cross-reference listings show this sensor is part of the SNS0812 / SNS0812A Continental NOx sensor family used on Hyundai/Kia SCR systems (Santa Fe / Sorento platforms)

Technical Description

This NOx sensor measures nitrogen oxide (NOx) concentration in diesel exhaust gases and sends real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 standards.

The SNS0812-family sensor is designed for high-temperature exhaust environments and is commonly used as either upstream or downstream SCR monitoring depending on vehicle configuration.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• NOx sensor communication faults
• P2200 / P229F / U029E type codes (platform dependent)
• Reduced engine power (limp mode)
• Increased emissions

OE / Part Numbers

• 29640-2FRF0
• SNS0812 / SNS0812A family
• Hyundai/Kia SCR NOx sensor platform group (2.0 / 2.2 CRDi SUVs)
• 5WK973xx / A2C1xxxx equivalents depending on revision

FAQ

Is this sensor interchangeable with 2F150 / 2F170 / 2F110?

No. Even though they look similar, Hyundai/Kia uses different SCR calibrations. SNS0812 family is not interchangeable with other 2F series sensors.

Why do Santa Fe and Sorento share this sensor?

Because both use the same Hyundai/Kia 2.0 / 2.2 CRDi Euro 6 SCR diesel architecture, so emission components are shared across SUV platforms.

Can aftermarket equivalents be used?

Yes, but only if the exact SNS0812A calibration family matches, otherwise SCR faults or limp mode may occur.