Struts: If your vehicle’s suspension has struts rather than shock absorbers, a knocking sound when going over bumps is a common sign of trouble.

Shocks contain fluid that dampens the bouncing, and once they start to leak, suspension performance will deteriorate.

Shock absorbers: They really should be called “dampers,” and when they wear out, you should notice more bouncing after a bump and a whole lot of shaking going on over rough roads because they can’t keep the tires planted on the pavement.

When you buy new tires, it’s a good idea to have the alignment checked so suspension issues don’t shorten tread life. Wheels get knocked out of alignment by potholes and curbs, but getting the wheels aligned won’t fix damaged springs, controls arms or other parts that affect alignment. If they aren’t, your steering won’t be centered when you’re going straight and tire wear will increase. The wheels have to be pointed in the right direction (literally) and aligned for toe-in, camber and caster.

Poor wheel alignment: You might not think about your wheels when there may be a problem with your suspension, but you should.

Here are some common issues you’re likely to encounter if your suspension is in need of repair: How can you tell if there are problems affecting your car’s suspension? There’s a number of symptoms and noises that should be your wakeup call to see a car doctor. Under those conditions, just about any part of a suspension system can be damaged or worn out from years of abuse.

Related: AAA: Potholes Are a Money Pit for Motorists

Suspension components, including springs, shock absorbers (or struts on some vehicles), anti-roll bars, control arms and other parts, are like combat troops serving on the front lines: They take a pounding daily from potholed streets, railroad tracks, rain, snow, road salt, gravel, all manner of dirt and grime, and the occasional piece of scrap metal or other debris that drivers see too late to avoid. Despite all the improvements in suspension systems, though, problems still occur from time to time. Car suspensions have evolved a lot over the years, and modern vehicles have more advanced suspension systems than ever before. A car suspension system is designed to maximize friction between the road surface and the vehicle’s tire, enhance passenger comfort and provide steering stability.

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