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NTKPart #: 25669
NTK 25669 Air / Fuel Ratio Sensor - Upstream
⚙️ 11 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$181.51Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Direct Fit 4-Wire A/F Sensor, Upstream
🚗Fitment: Mazda, 3 and 3 Sport
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Air / Fuel Ratio Sensor options
NTK 25669 Air / Fuel Ratio Sensor - Upstream
| Brand | NTK |
| Part Number | 25669 |
| Position | Direct Fit 4-Wire A/F Sensor, Upstream |
| Wiring Harness Length | 18.0 |
| Sensor Type | Heated |
| Thread Length | 0.38 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Thread Diameter | 18.000 |
| Mounting Bracket Included | No |
This part fits 11 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2009 | Mazda | 3 | 2.3L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2009 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2009 | Mazda | 3 Sport | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2008 | Mazda | 3 | 2.3L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2008 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2007 | Mazda | 3 | 2.3L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2007 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2006 | Mazda | 3 | 2.3L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2006 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2005 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
| 2004 | Mazda | 3 | 2.0L | L4 | Upstream | Front Sensor; Located in Manifold; B1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
15918234-908575-3493LF63188G1B9USG1661
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.