Md Amir

A failing O2 sensor usually triggers a Check Engine Light, drops fuel economy, causes rough idling, and may produce a sulfur smell from the exhaust.

A failing fuel pump typically causes engine sputtering at high speeds, rising temperature, loss of power under stress, or a loud whining noise from the tank.

A bad fuel filter usually causes difficulty starting, engine sputtering while accelerating, rough idling, and a whining noise from the fuel pump.

A bad coil pack causes engine misfires, rough idling, a flashing Check Engine light, and poor fuel economy due to incomplete combustion in the cylinders.

A bad catalytic converter typically causes a rotten egg smell, rattling noises from under the vehicle, sluggish engine performance, and a triggered Check

Slow engine cranking, dim headlights, a rapid clicking noise during ignition, and a bloated casing are clear indicators that a car battery is dying.

A bad brake booster usually causes a stiff pedal that requires extreme force to stop, often accompanied by a hissing noise near the floorboard.

Slow engine cranking, dim headlights at idle, and a swollen case are primary signs your car battery is failing or needs immediate replacement.

Dimming headlights, a dashboard battery warning light, and a burning rubber smell are the most common indicators that your alternator is failing.

You can identify a bad alternator by checking for dimming headlights, listening for whining noises, or testing if the voltage drops while the engine runs.