Vehicle Fitment
The AFH45M-46 MAF sensor is compatible with several Nissan applications.
Nissan Sentra
- 1991 Nissan Sentra 1.6L
- 1992 Nissan Sentra 1.6L
- 1993 Nissan Sentra 1.6L
- 1994 Nissan Sentra 1.6L
Nissan D21 Pickup
- 1990 Nissan D21 2.4L
- 1991 Nissan D21 2.4L
- 1992 Nissan D21 2.4L
- 1993 Nissan D21 2.4L
Supported Trim Levels
- Base
- XE
- E
- SE
- GXE
- Limited Edition
Always verify your OEM part number before ordering.
OEM Cross Reference Numbers
This sensor replaces several factory and aftermarket part numbers:
- AFH45M-46
- AFH45M46
- AFH55M10
- AFH55M-10
- 16119-73C00
- 16119-73C0A
- 16017-86G02
- N5401005
Cross-referencing part numbers helps ensure proper compatibility.
Common Symptoms of a Bad MAF Sensor
A faulty MAF sensor can create a variety of drivability issues.
Rough Idle
Incorrect airflow readings can cause unstable engine operation at idle.
Poor Fuel Economy
The ECU may command excessive fuel delivery when airflow data becomes inaccurate.
Hesitation or Lack of Power
Throttle response often suffers when fuel calculations are incorrect.
Check Engine Light
Many MAF-related failures trigger diagnostic trouble codes.
Hard Starting
Incorrect fuel mixture calculations can make starting more difficult.
Stalling
Severe sensor failure may cause the engine to stall unexpectedly.
DIY – How To Guide
Learn how to test your Nissan MAF using this Sentra guide.
Key Features
OEM-Style Performance
Designed to provide airflow readings that closely match original factory specifications.
Fast Signal Response
Quick response times allow the ECU to react rapidly to changing engine conditions.
Improved Fuel Efficiency
Accurate airflow measurement helps optimize fuel delivery.
Computer Tested
Each sensor is tested to help ensure reliable operation before installation.
Direct Replacement Design
No special modifications are required for installation.
Installation Overview
One advantage of replacing a MAF sensor is its simplicity.
Most owners can complete installation in approximately 10 to 15 minutes using basic hand tools.
Basic Installation Steps
- Disconnect the battery.
- Remove the electrical connector.
- Remove mounting hardware.
- Install the new sensor.
- Reconnect wiring.
- Reconnect battery.
- Clear diagnostic codes if necessary.
Many vehicles automatically relearn sensor values after installation.
Why Replace a Faulty MAF Sensor?
Ignoring a failing MAF sensor can create larger issues over time.
Benefits of replacement include:
- Improved engine performance
- Better throttle response
- Restored fuel economy
- Reduced emissions
- Smoother idle quality
- More accurate ECU fuel calculations
Considering the relatively low replacement cost, a MAF sensor can often solve expensive-looking drivability issues for a fraction of dealership diagnostic fees.
Pros and Cons
Pros
- Direct OEM replacement
- Fast installation
- Improves fuel economy
- Restores throttle response
- Computer tested
- Affordable repair solution
- Compatible with multiple Nissan applications
Cons
- Limited to specific Nissan models
- Requires correct part number verification
- May not solve issues caused by vacuum leaks or other engine problems
Final Verdict
The AFH45M-46 Mass Air Flow Sensor provides an affordable and effective solution for restoring performance in 1990-1994 Nissan Sentra and 1990-1993 Nissan D21 applications.
With direct-fit installation, OEM-compatible operation, and the ability to resolve common drivability problems such as rough idle, poor fuel economy, and hesitation, it’s one of the simplest repairs that can make a noticeable difference in vehicle performance.
For owners of aging Nissan vehicles experiencing airflow sensor issues, replacing a faulty MAF sensor is often one of the smartest maintenance investments you can make.
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