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<div style="max-width: 1000px; margin: 0 auto; background: white; padding: 40px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1);"><div style="background: linear-gradient(135deg, #da3b1f 0%, #b8321a 100%); color: white; padding: 40px; text-align: center; border-radius: 8px; margin-bottom: 30px;"><h2 style="font-size: 42px; margin: 0 0 15px 0;">Oxygen Sensors Starting at $24.99</h2><p style="font-size: 20px; margin: 0;">16,399+ Applications | Same-Day Shipping | 3-Year Warranty</p></div><p style="font-size: 18px; margin-bottom: 25px;">Your O2 sensors control everything from fuel economy to emissions. They tell your engine computer exactly how much fuel to inject by measuring oxygen levels in your exhaust. When they go bad, you'll feel it in your wallet at the gas pump and see it when your check engine light comes on.</p><h2 style="color: #da3b1f; font-size: 28px; margin: 35px 0 20px 0; padding-bottom: 10px; border-bottom: 3px solid #da3b1f;">Symptoms of a Bad Oxygen Sensor</h2><p style="margin-bottom: 18px;">Check Engine Light is the most common sign with trouble codes like P0130-P0167, poor fuel economy means the engine burns more fuel than necessary leading to lower MPG, and rough idle with engine misfires from imbalanced air-fuel mixture, plus increased emissions causing failed smog tests. These symptoms start small but get worse fast.</p><p style="margin-bottom: 18px;">A bad O2 sensor causes rough idle and loss of engine power, along with poor acceleration, engine misfires, and even stalling since bad oxygen sensors disrupt essential engine functions including timing, combustion intervals, and air-fuel ratio. Your fuel economy can drop 20-40% when sensors fail.</p><div style="background: #fff3e6; border-left: 4px solid #da3b1f; padding: 20px; margin: 25px 0; border-radius: 4px;"><h3 style="color: #da3b1f; margin: 0 0 12px 0; font-size: 20px;">Watch For These Warning Signs:</h3><p style="margin: 8px 0;"><strong>? Check engine light:</strong> Codes P0130-P0167 mean sensor problems</p><p style="margin: 8px 0;"><strong>? Terrible gas mileage:</strong> 20-40% worse fuel economy overnight</p><p style="margin: 8px 0;"><strong>? Rough idle:</strong> Engine shakes, stalls, or surges at stop lights</p><p style="margin: 8px 0;"><strong>? Failed emissions:</strong> Won't pass smog test, can't register your vehicle</p><p style="margin: 8px 0;"><strong>? Rotten egg smell:</strong> Catalytic converter overheating from bad fuel mixture</p></div><h2 style="color: #da3b1f; font-size: 28px; margin: 35px 0 20px 0; padding-bottom: 10px; border-bottom: 3px solid #da3b1f;">How Much Does O2 Sensor Replacement Cost?</h2><p style="margin-bottom: 18px;">Professional oxygen sensor replacement typically costs between $150 and $600 depending on labor rates and your vehicle's make and model, and timely replacement not only restores performance but prevents further damage. Most of that cost is labor and dealer markups.</p><p style="margin-bottom: 18px;">We sell direct to you at $24.99 to $59.99 per sensor?that's OEM quality at 50-75% off dealer prices. You save $100-$500 depending on how many sensors your car has. Most vehicles have 2-4 oxygen sensors total. Replacing them yourself takes 30 minutes with basic tools, or your mechanic can install ours for just the labor cost.</p><table style="width: 100%; border-collapse: collapse; margin: 25px 0; font-size: 15px;"><thead><tr style="background: #da3b1f; color: white;"><th style="padding: 12px; text-align: left; border: 1px solid #ddd;">Sensor Position</th><th style="padding: 12px; text-align: left; border: 1px solid #ddd;">What It Does</th><th style="padding: 12px; text-align: left; border: 1px solid #ddd;">Our Price</th></tr></thead><tbody><tr style="background: #f9f9f9;"><td style="padding: 10px; border: 1px solid #ddd;">Upstream (Pre-Cat)</td><td style="padding: 10px; border: 1px solid #ddd;">Controls real-time fuel mixture</td><td style="padding: 10px; border: 1px solid #ddd;">$24.99-$59.99</td></tr><tr><td style="padding: 10px; border: 1px solid #ddd;">Downstream (Post-Cat)</td><td style="padding: 10px; border: 1px solid #ddd;">Monitors catalytic converter</td><td style="padding: 10px; border: 1px solid #ddd;">$24.99-$59.99</td></tr></tbody></table><h2 style="color: #da3b1f; font-size: 28px; margin: 35px 0 20px 0; padding-bottom: 10px; border-bottom: 3px solid #da3b1f;">What Does the O2 Sensor Do in a Car?</h2><p style="margin-bottom: 18px;">Your oxygen sensors sit in your exhaust system measuring oxygen levels in the exhaust gases. They send voltage signals to your engine computer?0.1 volts when there's too much oxygen (lean), 0.9 volts when there's too little (rich). Your computer reads these signals and adjusts fuel injection to keep your engine running at peak efficiency.</p><p style="margin-bottom: 18px;">Oxygen sensors are not components that need regular servicing or replacement like brake pads or motor oil, typically lasting anywhere between 30,000 to 100,000 miles and should be replaced as soon as they fail. When they do fail, replace them immediately to avoid catalytic converter damage.</p><div style="background: #da3b1f; color: white; padding: 35px; text-align: center; border-radius: 8px; margin: 35px 0;"><h2 style="color: white; margin: 0 0 15px 0; font-size: 32px;">Fix Your Fuel Economy Today</h2><p style="font-size: 18px; margin: 0 0 20px 0;">O2 sensors for 16,399+ vehicles | From $24.99</p><span style="display: inline-block; background: white; color: #da3b1f; padding: 15px 40px; border-radius: 50px; text-decoration: none; font-weight: bold; font-size: 20px;">Shop Now</span></div><h2 style="color: #da3b1f; font-size: 28px; margin: 35px 0 20px 0; padding-bottom: 10px; border-bottom: 3px solid #da3b1f;">Frequently Asked Questions</h2><div style="margin: 20px 0;"><h3 style="color: #333; font-size: 20px; margin-bottom: 10px;">Can I drive with a bad O2 sensor?</h3><p style="margin-bottom: 20px;">While you can drive with a faulty oxygen sensor temporarily, doing so for extended periods can damage your catalytic converter and engine. The sensor failure causes rich fuel mixture that destroys your cat?a $1,000-$2,500 repair. Replace the sensor now before it costs you thousands.</p></div><div style="margin: 20px 0;"><h3 style="color: #333; font-size: 20px; margin-bottom: 10px;">How many O2 sensors does my car have?</h3><p style="margin-bottom: 20px;">Many standard vehicles come with at least two oxygen sensors. V6 and V8 engines typically have 4 sensors?one before and one after the catalytic converter on each bank. Check your service manual or contact us with your vehicle info and we'll tell you exactly how many you need.</p></div><div style="margin: 20px 0;"><h3 style="color: #333; font-size: 20px; margin-bottom: 10px;">Should I replace all O2 sensors at once?</h3><p style="margin-bottom: 20px;">If one sensor fails, the others are probably close behind since they all have similar wear. Replacing all sensors at once prevents you from paying labor twice. We offer great prices on sensor sets?buy multiple and save even more than replacing one at a time.</p></div><div style="margin: 20px 0;"><h3 style="color: #333; font-size: 20px; margin-bottom: 10px;">Will a new O2 sensor fix my check engine light?</h3><p style="margin-bottom: 20px;">A failing oxygen sensor is one of the most common reasons for a check engine light, and if the sensor sends wrong readings, the engine control unit will log an error and turn on the light. Replace the bad sensor, clear the codes with an OBD scanner, and the light should stay off.</p></div><div style="margin: 20px 0;"><h3 style="color: #333; font-size: 20px; margin-bottom: 10px;">Do your sensors work as well as OEM parts?</h3><p style="margin-bottom: 20px;">Our sensors use the same zirconia ceramic elements and platinum electrodes as factory parts. They're built to OEM specifications and carry a 3-year warranty?that's longer than most dealer warranties. You get identical performance and reliability at fraction of the price.</p></div></div>

Oxygen Sensor

Car Oxygen Sensor Price From $24.99 | A-Premium

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Air Cleaner

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Air Filter Box

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Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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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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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.

2002 Mazda Millenia Oxygen Sensor

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