Mass Air Flow Sensors

Purpose

Based on the air mass information, the engine control unit (ECU) is able to balance and deliver the correct fuel quantity to the engine. In diesel engines, the MAF sensor serves mainly to control the exhaust gas recirculation (EGR). The majority of MAF sensors come in two variations: hot-wire technology and hot-film technology. These MAF sensors have no moving parts and use electrical current to measure air mass.

Function

Situated between the intake manifold and the air filter, the MAF sensor is a vital part of the engine management system and determines the amount of air flowing into the intake system of diesel and petrol combustion engines. Based on the air mass information, the engine control unit is able to balance and deliver the correct fuel quantity to the engine. In diesel engines, the MAF sensor serves mainly to control the exhaust gas recirculation (EGR).

Position

The MAF sensor is located between the intake manifold and the air filter.

Cause for Replacement

MAF sensors can degrade in quality over time as well as becoming prone to failure if they get too dirty, which can be caused by exposure to dust, water and oil. Symptoms of a faulty MAF sensor to look out for include the ‘check engine light’ being turned on, reduced fuel economy, difficulty starting the engine, lean idling, black exhaust smoke, unstable engine running, engine power loss and engine misfiring.

The NTK Difference

Rigorously tested for quality and performance, NTK sensors are engineered to meet or exceed OE specifications.

• Dual aluminum wire bonding ensures a more reliable and longer lasting product
• Patented microcontroller technology design for more accurate temperature compensation
• A laser cut, ceramic cylinder, glass-coated sensor with platinum film increases the accuracy under different airflows and temperatures
• Available with full housing or a probe only option for easier installation depending on the application