OE 39210-25110 — Oxygen sensor assembly for Hyundai / Kia

The Related OE References table above lists the alternates we see most often in trade inquiries. Cross-references work because the engineering envelope is shared across the electrical & sensors family — always confirm dimensions and connector layout before you swap.

Position depends on the platform. On most Hyundai / Kia applications the oxygen sensor assembly sits on the electrical & sensors assembly and can be reached from the engine bay or the underbody without removing the dashboard. Torque figures and disassembly order are given in the workshop manual for each model.

OEM means the part was produced for the vehicle maker's assembly line; aftermarket means it is made independently to the same engineering drawing. For a oxygen sensor assembly the practical gap is usually tooling age and packaging rather than fit, provided the tolerance class matches.

Report it with the order number and packing-list line plus photographs. Because every carton is photographed before loading, we can trace the batch immediately and settle the claim against the inspection record instead of arguing from memory.

Four variables explain most of the spread: material grade, whether the goods are new production or clearance stock, packing format, and whether the quote is ex-works or landed. Ask for the material certificate alongside the price — that is what makes a comparison like-for-like.

For a short distance at reduced load, usually yes — but the risk compounds. A degraded oxygen sensor assembly transfers stress to neighbouring components, so a small repair can grow into a full electrical & sensors rebuild. Book the replacement once the symptom is repeatable.