A MacPherson strut is a single suspension unit that combines the shock absorber, coil spring, and steering pivot into one assembly. It’s the default front suspension on most front-wheel-drive cars sold in the U.S.—including the Honda Civic, Toyota Camry, Ford Focus, and Chevrolet Cruze—because it’s compact, cheap to manufacture, and saves space under the hood….
Power steering uses either hydraulic pressure from a belt-driven pump or an electric motor to reduce the effort needed to turn the steering wheel. Hydraulic systems (HPS) are common on vehicles built before 2010; electric systems (EPS) dominate most 2010+ models, though some heavy trucks and SUVs still use hydraulic. The type affects maintenance, repair…
A wheel bearing is a set of steel balls or rollers inside a metal race that lets your wheel spin with minimal friction. When it starts to fail, you’ll hear a low-pitched humming, growling, or rumbling that changes with speed and often gets louder when you turn one way. The quickest diagnostic check is a…
Wheel alignment adjusts the suspension angles so your tires contact the road straight, wear evenly, and the car tracks properly. Three critical angles—camber, caster, and toe—are set to manufacturer specs for your specific make, model, and trim. When any of these falls out of range, you’ll feel it in the steering wheel and see it…
A sway bar (also called an anti-roll bar or stabilizer bar) is a steel torsion spring that connects the left and right sides of your suspension through rubber or polyurethane bushings. Its job is to reduce body lean in corners while minimizing the impact on straight-line ride comfort. When those bushings wear out, you will…
A tie rod is the steering link that connects your steering rack (or gearbox) to the steering knuckle. Every front-wheel-steering vehicle has two per side: an inner rod that screws into the rack, and an outer rod that attaches via a ball joint. When either wears out, you’ll feel loose steering, clunking, or uneven tire…
A ball joint is a pivot component in your vehicle’s front suspension that connects the control arm to the steering knuckle. It allows the wheel to move up and down while turning left and right. When it fails, you’ll notice clunking noises, uneven tire wear, and loose steering. This article explains how ball joints work,…
A control arm is the suspension link that connects your wheel hub to the vehicle frame. It lets the wheel move up and down while keeping it aligned. When the ball joint or bushing wears out, you’ll hear clunking over bumps, feel steering wander, and see uneven tire wear. Replacement typically runs $300–$800 per arm…
If your car bounces more than twice after hitting a bump, feels loose in corners, or dives hard under braking, worn dampers are the most likely cause. Shocks are bolt-on dampers that control spring movement but do not support the vehicle’s weight. Struts are structural components that combine damping with weight support and often form…
Your car’s airbag system is a network of impact sensors, an SRS control unit (restraint module), and inflatable cushions that deploy during a severe crash. When a collision is detected, the control unit fires a chemical charge that inflates the bag in about 30 milliseconds, then vents the gas so you can move. The most…