The mass airflow sensor (MAF) on a 2014 Nissan Altima is located in the intake air duct between the air filter box and the throttle body. It’s a small rectangular sensor mounted inline on the plastic intake tube, usually easy to reach from the engine bay.
Location in the engine bay
In the 2014 Altima, whether you have the 2.5L four-cylinder or the 3.5L V6, the MAF sensor sits along the intake tube that connects the air box to the throttle body. It’s typically mounted on the side of the duct toward the passenger side of the engine compartment and has an electrical connector plugged into it.
How to identify it at a glance:
- Rectangular sensor mounted directly on the plastic intake pipe
- Electrical connector attached to the sensor with a multi-pin plug
- Located between the air filter housing (air box) and the throttle body
- Usually labeled or described in service guides as the MAF sensor
In most configurations, this placement is consistent across the 2.5L and the 3.5L engines, though the surrounding hoses and routing may vary slightly by trim level.
Access and replacement
Before inspecting or replacing the MAF sensor, ensure you take basic safety steps: turn off the engine, remove the key, and for extra precaution disconnect the negative battery terminal to prevent electrical shorts. The following steps describe a typical replacement process:
Follow these steps to locate and access the MAF sensor on the Altima's intake tube:
- Open the hood and locate the air intake box on the passenger side of the engine bay
- Trace the plastic intake tube from the air box toward the throttle body to find the MAF sensor mounted in the duct
- Disconnect the electrical connector by depressing the locking tab and pulling the plug away from the sensor
- Remove the mounting screws or clamps securing the sensor to the duct, then carefully slide the sensor out
- Install the new MAF sensor, secure it with the screws/clamps, reconnect the electrical connector
- Reconnect the negative battery terminal, start the engine, and confirm normal operation
After replacement, clear any stored diagnostic trouble codes and take the car for a test drive to verify there are no lingering issues. If the check engine light returns or performance problems persist, a broader intake or engine diagnostic may be required.
Summary
The 2014 Nissan Altima’s MAF sensor is located in the intake duct between the air filter box and the throttle body, on the passenger side of the engine bay. It’s a small rectangular sensor with an electrical connector, and replacement involves removing the sensor from the intake tube and installing a new one with basic hand tools. Always follow safety precautions and verify operation after reassembly.