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<h2><span style="font-size: 18px;">What is a wear sensor on brake pads?</span></h2>
<p><span style="font-size: 14px;">A brake pad wear sensor on a car is a small electronic device that is attached to the brake pads in a vehicle. It is designed to alert the driver when the brake pads are worn down and need to be replaced.</span></p>
<h2><span style="font-size: 18px;">How does the brake pad wear sensor work?</span></h2>
<p><span style="font-size: 14px;">The brake pad wear sensor works by monitoring the thickness of the brake pad. It is typically made up of a small metal tab or wire that is attached to the brake pad. As the brake pad wears down over time, the metal tab or wire gets closer to the brake rotor. When the brake pad wears down to a certain point, the metal tab or wire will make contact with the brake rotor, creating an electrical circuit that triggers a warning light on the dashboard of the car.&nbsp;</span></p>
<p><span style="font-size: 14px;">The warning light is usually a red circle with an exclamation point in the center, and it may also say "Brake" or "Brake Pad Wear" on it. When the warning light comes on, it is important to have the brake pads replaced as soon as possible to ensure that the brakes continue to work effectively and safely.</span></p>
<h2><span style="font-size: 18px;">Do all cars have a brake wear sensor？</span></h2>
<p><span style="font-size: 14px;">No, not every car is equipped with a brake wear indicator on it. Generally speaking, the presence of a brake pad wear sensor can depend on the make and model of the car, as well as the year it was manufactured. For some newer cars, especially luxury vehicles, brake pad wear indicator is a standard feature. Some entry-level and budget-friendly vehicles, however, may not have this device.</span></p>
<h2><span style="font-size: 18px;">Brake pad wear sensor replacement</span></h2>
<p><span style="font-size: 14px;">To replace a brake pad wear sensor, you need to first locate the sensor on the inside brake pad closest to the brake caliper before disconnecting the electrical connector. Then remove the old sensor by employing some tools. And you are ready to install the new brake wear indicator. Don&rsquo;t forget to reconnect the electrical connector to test the new wear sensor and ensure that the warning light on the dashboard goes out. If you are not comfortable performing the replacement yourself, it is recommended to have a qualified mechanic do the job.</span></p>

Brake Pad Wear Sensor

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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 Cover

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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

Engine Oil Pan Gasket

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Flywheel

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Oil Filter

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Oil Level Sensor

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Oil Pan

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Oil Pump

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Oil Pump Pickup Tube

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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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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 Coolant Pipe

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Water Outlet

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Engine Cooling

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Engine Mount

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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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Vapor Canister Vent Solenoid

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Exhaust & Emission Systems

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Fuel Injector

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Fuel Line Kit

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High Pressure Fuel Pump

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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.

2018 Audi S4 Brake Pad Wear Sensor

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