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NTK 24551 Oxygen Sensor - Downstream or Upstream
| Brand | NTK 24551 |
|---|---|
| Position | Upstream and Downstream |
| Wiring Harness Length | 9.0000 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Thread Diameter | 18.000 |
| Mounting Type | Flange |
| Product line | Direct Fit Oxygen Sensor |
| Fits | Chevrolet and Toyota · 16 vehicles |
Direct-fit design. Specific-fit replacement for OE-style oxygen sensor applications.
Heated sensor. 4-wire construction helps the sensor reach operating temperature quickly.
OE-level testing. Manufactured and tested to meet or exceed OE specifications.
Cross-references Bosch 12051, Bosch 15534 and Carlson 13392 for the same application. See all 22.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct-fit oxygen sensor
NTK 24551 is a direct-fit heated oxygen sensor built for specific import and domestic applications. It uses a 4-wire design, a flange mount, and a 9-inch harness for OE-style replacement on supported vehicles.
Key features
- Heated oxygen sensor for faster operating response.
- Specific-fit design for direct replacement applications.
- 4-wire configuration with 18 mm thread diameter.
- Flange mounting style for OE-style installation.
- 9-inch wiring harness length.
Detailed description
NTK 24551 is part of the Direct Fit Oxygen Sensor line from NTK, a brand within the NGK family of products. NTK focuses on streamlined coverage for import and domestic applications, and its oxygen sensors are manufactured with ceramic expertise and tested during production to meet OE-level expectations for fit, form, and function. This part is used in applications such as 1990-1992 Toyota Land Cruiser, 1989-1991 Toyota Pickup, 1988 Toyota Corolla, and 1988 Chevrolet Nova. It also fits earlier Toyota Land Cruiser applications, including 1981-1985 and 1986-1987 models, with application-specific notes. The part number 24551 is also referenced in OE-style replacement listings for these vehicles.
What it can solve
- Faulty oxygen sensor readings.
- Check engine light concerns related to sensor performance.
- Air-fuel ratio control issues.
- Emissions test failures caused by sensor degradation.
- Slow sensor response from an aging heated sensor.
Installation notes and quality
Compatible With specific upstream and downstream applications listed in the fitment table. Match the mounting type, thread diameter, wire count, and harness length to the original sensor before installation. Fitment includes Toyota Land Cruiser, Toyota Pickup, Toyota Corolla, and Chevrolet Nova applications. NTK states that these oxygen sensors are extensively tested during manufacturing to support quality and reliability that meet or exceed OE specifications.
| Year | Make | Model | Body Type | # Doors | Drive Type | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| 1992 | Toyota | Land Cruiser | — | — | — | 4.0L | L6 | — | Upstream | Cylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1991 | Toyota | Land Cruiser | — | — | — | 4.0L | L6 | — | Upstream | Cylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1991 | Toyota | Pickup | — | — | RWD | 2.4L | L4 | — | Downstream | B1S2; Calif. Emissions; Long Bed; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1990 | Toyota | Land Cruiser | — | — | — | 4.0L | L6 | — | Upstream | Cylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1990 | Toyota | Pickup | — | — | RWD | 2.4L | L4 | — | Downstream | B1S2; Calif. Emissions; Long Bed; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1989 | Toyota | Pickup | — | — | RWD | 2.4L | L4 | — | Downstream | B1S2; Calif. Emissions; Long Bed; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1988 | Chevrolet | Nova | — | — | — | 1.6L | L4 | — | Upstream | OE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor |
| 1988 | Toyota | Corolla | — | — | — | 1.6L | L4 | — | Upstream | OE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor |
| 1987 | Toyota | Land Cruiser | — | — | — | 4.2L | L6 | — | Upstream | OE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor |
| 1986 | Toyota | Land Cruiser | — | — | — | 4.2L | L6 | GAS | Upstream | OE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit Oxygen Sensor |
| 1985 | Toyota | Land Cruiser | — | — | — | 4.2L | L6 | GAS | Upstream | w/OE # 89465-60030; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1985 | Toyota | Land Cruiser | — | — | — | 4.2L | L6 | GAS | Upstream | w/OE # 89425-69035; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1984 | Toyota | Land Cruiser | — | — | — | 4.2L | L6 | GAS | Upstream | w/OE # 89425-69035; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1983 | Toyota | Land Cruiser | Sport Utility | 4 Door | — | 4.2L | L6 | GAS | Upstream | Equivalent OE design oxygen sensor; Direct Fit Oxygen Sensor |
| 1982 | Toyota | Land Cruiser | Sport Utility | 4 Door | — | 4.2L | L6 | GAS | Upstream | Equivalent OE design oxygen sensor; Direct Fit Oxygen Sensor |
| 1981 | Toyota | Land Cruiser | Sport Utility | 4 Door | — | 4.2L | L6 | GAS | Upstream | Equivalent OE design oxygen sensor; Direct Fit Oxygen Sensor |
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