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<h2>What is TPMS on the car?</h2>Tire Pressure Monitoring System (TPMS) Sensor is a system in modern vehicles that monitors the air pressure in each tire and alerts the driver if the pressure falls below a certain level. It helps improve safety by warning of underinflated tires, which can lead to reduced fuel efficiency and handling issues, as well as increased risk of blowouts.<h2>Types of TPMS sensor</h2>Direct TPMS:&nbsp;This system uses pressure sensors inside each tire to directly measure the tire's air pressure. If the pressure drops below a predefined threshold, it sends a signal to the vehicle's onboard computer, which then alerts the driver through a warning light on the dashboard.Indirect TPMS: This system doesn't use pressure sensors but relies on the vehicle's anti-lock braking system (ABS) to indirectly monitor tire pressure. It detects changes in tire circumference, which can vary with tire pressure. If it detects a significant difference in wheel speed, it assumes there's a pressure issue and triggers a warning.<h2>How to replace a TPMS sensor?</h2>Before you decide to replace the TPMS sensor by yourself, make sure you have gathered all the tools and materials you will need. Refer to the following list:<ul><li>New TPMS sensor (make sure it is compatible with your car)</li><li>Jack and jack stands or a vehicle lift</li><li>A lug wrench or socket set</li><li>Torque wrench</li><li>TPMS reset tool (if required by your car)</li><li>Valve core removal tool</li><li>Rubber valve stem grommet (if needed)</li><li>Tire pressure gauge</li></ul><h3>Specific steps to replace</h3><ol><li>Safety first: Park safely, engage the parking brake, and turn off the engine.</li><li>Remove the wheel: Use the lug wrench to take off the wheel.</li><li>Locate the TPMS sensor: Find the sensor inside the rim, secured by a nut or screw.</li><li>Remove the TPMS sensor: Carefully take out the sensor.</li><li>Install the new sensor: Attach it to the valve stem or replace the entire valve stem if necessary.</li><li>Secure the sensor: Use a torque wrench to tighten it properly.</li><li>Reattach the wheel: Place the wheel back on, hand-tighten lug nuts, and torque them correctly.</li><li>Lower the vehicle: If you use a jack, lower the vehicle.</li><li>Check and adjust tire pressure: Verify and adjust tire pressure as per your vehicle's specifications.</li><li>Reset TPMS: If needed, reset the TPMS system using the appropriate tool.</li><li>Test the TPMS: Drive briefly to ensure the system is functioning, with the warning light off.</li></ol>

Tire Pressure Monitoring System Sensor

Air Cleaner

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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

Air Intake Resonator

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

Intake Manifold Repair Bracket

Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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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

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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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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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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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

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

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

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Radiator

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Radiator Control Fan Module

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Radiator Core Support Skid Bar Plate

Radiator Fan Cooling Motor

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Radiator Hose

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Engine Cooling

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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.

BMW 420i Tire Pressure Monitoring System Sensor