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<h2>What is a control arm in a car?</h2>
The control arms of your suspension system are the essential component. For a better understanding, control arms are the connection that links your car's wheels to the rest of the vehicle. Your vehicle's wheel assembly is connected to one end of this cable, and the structure of your car is connected to the other.
The upper and lower control arms then join the vehicle's chassis, with the upper arm connecting to the region of the wheel at the very top and the lower arm connecting to the part of the wheel at the bottom. The design is the same whether or not the vehicle has an independent rear suspension.
The control arms are believed to have a good life, i.e., up to 100,100 miles. However, they degenerate, bend, and wear out over a considerable period. This can be reduced in case of severe accidents where they can instantly break because of the trauma.
<h2>Symptoms of a bad control arm</h2>
<ul>
<li>Uneven tire wear Abnormal wear patterns on tires due to misalignment.</li>
<li>Vibration or noise Clunking, knocking, or rattling sounds when driving over bumps.</li>
<li>Steering problems Difficulty steering or a loose feeling in the steering wheel.</li>
<li>Poor handling Reduced stability or increased body roll during turns.</li>
<li>Alignment issues The vehicle pulling to one side or wandering during straight-line driving.</li>
<li>Visible damage Cracks, bends, or rust on the control arm or bushings.</li>
</ul>
<h2>What to do if you have control arm issues?</h2>
If you notice any of the symptoms mentioned, take your vehicle to a shop for a comprehensive suspension inspection. For those who enjoy DIY repairs, lift your car on jack stands and carefully examine the control arms and front steering for any problems. If your control arm or any other <a href="https://a-premium.com/suspension-and-steering">suspension component</a> fails while driving, try to slow down and safely move off the road. Keep in mind that a complete failure of the control arm may result in loss of steering control.

Control Arm

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intercooler

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Oxygen Sensor

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Pressure Sensor

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Throttle Body

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Throttle Position Sensor

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Turbocharger

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

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Camshaft Timing Gear

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Camshafts

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Engine Valve Cover

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Harmonic Balancer

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Timing Belt Kit

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

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Engine Oil Dipstick Tube

Engine Oil Filter

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Flywheel

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Oil Cooler

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Oil Cooler Line

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Oil Filter

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Oil Filter Housing

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Ignition Coil

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Ignition Coils & Spark Plugs Kits

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Ignition Distributor

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Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Engine Components & Accessories

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Auxiliary Water Pump

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Expansion Tank

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Outlet

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Engine Cooling

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Engine Mount

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Engine Mounts

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Catalytic Converter

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EGR Valve

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Exhaust Fluid Heater

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Exhaust Gas Temperature Sensor

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Exhaust Manifold

Fuel Tank Breather Valve

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Fuel Vapor Leak Detection Pump

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Nitrogen Oxide Sensor

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Secondary Air Injection Check Valve

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Exhaust & Emission Systems

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Fuel Injector

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Fuel Injector Module Wiring Harness

Fuel Line Kit

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Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

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Fuel Systems & Components

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

2017 Mercedes-Benz S400L Control Arm

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