NGK NTK Direct-Fit Oxygen Sensor - Acura NSX / Legend 1991-2003

This is NTK's OE identical direct fit oxygen sensor, the same narrow-band zirconia design NGK supplies to manufacturers as original equipment. It is a heated 4 wire sensor with a blade terminal connector, M18 x 1.5 threads, a 7/8 in hex and a 22 in harness, so it seats in the factory bung and plugs into the factory connector with no splicing. The ceramic element carries a 3 stage contaminant resistant plasma jet and deposit trap overcoat that guards the sensing tip against poisoning. Accurate closed loop feedback to the ECU is what keeps fuel trims correct and the OBDII catalyst efficiency monitor from setting a code.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy