This NTK direct fit oxygen sensor (stock number 24409) is a heated, 4-wire sensor that reports exhaust oxygen content to the engine computer. It has an 18 mm thread and a 20 in wiring harness and plugs into the factory connector without splicing. Mounted downstream of the catalytic converter, it monitors converter efficiency for the engine computer.
Specifications
| Type | Direct fit oxygen sensor |
| Brand Line | NTK (NGK sensor line) |
| Sensor Type | Heated |
| Position | Downstream |
| Fit | Direct fit, factory connector |
| Thread | 18 mm |
| Wire Count | 4 |
| Wire Length | 20 in |
| Engines | 2.0L L4 |
| Quantity | 1 |
| Part Number | 24409 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2004 | Acura | RSX | Base |
| 2002-2004 | Acura | RSX | Type-S |
| 2002-2005 | Honda | Civic | Si |
Is this an NGK or an NTK sensor?
- NTK is the oxygen and air fuel ratio sensor line of NGK Spark Plugs; the sensor and box carry the NTK name.
Which position does this sensor fit?
- It fits the downstream position, after the catalytic converter.
Do I need to splice wires to install it?
- No. It is a direct fit sensor that plugs into the factory connector.
How many sensors does my vehicle need?
- It is sold individually. Vehicles with more than one sensor position need one sensor for each position being replaced.
Shipping
- Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- 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 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
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