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Spectra MP129 Manifold Absolute Pressure Sensor
| Brand | Spectra MP129 |
|---|---|
| Fits | INFINITI and Nissan · 24 vehicles |
OE specifications. Meets or exceeds OE fit, form, and function.
Manifold absolute pressure sensor. Measures intake manifold pressure for precise engine control.
Cross-references Eastern Catalytic 50508, Standard Ignition AS81 and 5S2449 for the same application. See all 11.
Spectra MP129 Manifold Absolute Pressure Sensor
The Spectra MP129 manifold absolute pressure sensor is built for direct replacement service on select Nissan and INFINITI applications. It is engineered to meet or exceed OE specifications for fit, form, and function, helping restore accurate intake manifold pressure signal output for proper engine management.
Key Features
- Manifold absolute pressure sensor for emission control and engine management systems
- OE-style fit, form, and function for straightforward replacement
- Direct-fit application coverage for select Nissan and INFINITI vehicles
- Cross-references Standard Ignition AS81 for the same application
- Part number MP129 for catalog and service identification
Detailed Description
Use the Spectra MP129 when servicing a faulty MAP sensor on vehicles such as the 1997-2001 INFINITI Q45, 1998-2000 Nissan Frontier, 1997-2000 Nissan Pathfinder, and 1997-1999 Nissan Altima. It also covers additional applications including the 1999-2002 INFINITI G20, 1998-2000 INFINITI QX4, 2000 Nissan Xterra, and 2001 Nissan Maxima. This part cross-references Standard Ignition AS81 for the same application.
What It Helps Address
- Erratic engine load readings
- Rough idle or hesitation related to manifold pressure input
- Check engine light concerns tied to MAP sensor performance
- Fuel delivery and air-fuel ratio issues caused by incorrect pressure data
- Driveability problems on Nissan and INFINITI models with a failing sensor
Installation Notes and Tips
Verify connector style, mounting location, and engine application before installation. Confirm the vehicle match against the listed fitment for MP129, and inspect the intake system for vacuum leaks or wiring damage that could affect sensor readings after replacement.
Quality Assurance
Spectra states that this manifold absolute pressure sensor is manufactured to meet or exceed OE specifications for fit, form, and function.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | INFINITI | G20 | 2.0L | L4 | N/A | — |
| 2001 | INFINITI | G20 | 2.0L | L4 | N/A | — |
| 2001 | INFINITI | Q45 | 4.1L | V8 | N/A | — |
| 2001 | Nissan | Maxima | 3.0L | V6 | N/A | — |
| 2000 | INFINITI | G20 | 2.0L | L4 | N/A | — |
| 2000 | INFINITI | Q45 | 4.1L | V8 | N/A | — |
| 2000 | INFINITI | QX4 | 3.3L | V6 | N/A | — |
| 2000 | Nissan | Frontier | 2.4L | L4 | N/A | — |
| 2000 | Nissan | Pathfinder | 3.3L | V6 | N/A | — |
| 2000 | Nissan | Xterra | 2.4L | L4 | N/A | — |
| 1999 | INFINITI | G20 | 2.0L | L4 | N/A | — |
| 1999 | INFINITI | Q45 | 4.1L | V8 | N/A | — |
| 1999 | INFINITI | QX4 | 3.3L | V6 | N/A | — |
| 1999 | Nissan | Altima | 2.4L | L4 | N/A | — |
| 1999 | Nissan | Frontier | 2.4L | L4 | N/A | — |
| 1999 | Nissan | Pathfinder | 3.3L | V6 | N/A | — |
| 1998 | INFINITI | Q45 | 4.1L | V8 | N/A | — |
| 1998 | INFINITI | QX4 | 3.3L | V6 | N/A | — |
| 1998 | Nissan | Altima | 2.4L | L4 | N/A | — |
| 1998 | Nissan | Frontier | 2.4L | L4 | N/A | — |
| 1998 | Nissan | Pathfinder | 3.3L | V6 | N/A | — |
| 1997 | INFINITI | Q45 | 4.1L | V8 | N/A | — |
| 1997 | Nissan | Altima | 2.4L | L4 | N/A | — |
| 1997 | Nissan | Pathfinder | 3.3L | V6 | N/A | — |
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