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Automotive Sensors

A failing oxygen sensor can ruin your fuel economy and cause engine damage. Our high-quality aftermarket O2 sensors are designed for perfect compatibility and long-lasting data precision. Whether you are looking for upstream or downstream sensors, we provide the reliable emission control components needed to pass smog tests and keep your engine in top shape.

💡 Note: Our vehicle fitment database is massive. If dropdowns don't respond immediately, please wait a few seconds.

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FAQ & Support

🚦 1. Trouble Codes & Symptoms

Q1: My car shows codes like P0420 / P0171 / P0138. What do they mean?

These are common codes related to the fuel system or oxygen sensors:

P0420: Catalyst efficiency below threshold
P0171: System too lean
P0138: O2 sensor voltage high

They often indicate a worn oxygen sensor, exhaust leak, or ignition issue. If you're not sure, simply tell us your year, make, model, and engine—we'll check the exact part you need.

Q2: My engine shakes at idle. Is my ignition coil bad?

It's very possible. Common symptoms of a failing ignition coil include:

Rough idle or shaking
Hard cold starts
Poor acceleration
Higher fuel consumption
Misfire popping noise

Tell us your vehicle info—our team can help you identify the cause.

Q3: What are the symptoms of a bad oxygen sensor?

Typical signs include: Check Engine Light on, Increased fuel consumption, Poor acceleration, Strong fuel smell, and Slow throttle response.

Most sensors should be replaced every 80,000–100,000 km.

🔍 2. Fitment & Compatibility

Q4: How do I know which oxygen sensor fits my car?

Just provide: Year, Make, Model, and Engine size.

We'll confirm: Upstream or downstream, Correct connector, Proper reference number, and Federal vs. California emissions compatibility.

Q5: What's the difference between ignition coils?

High-quality aftermarket: Close to Standard but more affordable.

We only offer high-grade, reliable ignition coils.

Q6: How many oxygen sensors does my car have?

Most vehicles have 2–4 sensors (Upstream front and Downstream rear). We can confirm the exact number for your vehicle.

🛒 3. Buying, Quality & Concerns

Q7: Are cheap oxygen sensors reliable?

They work for a short time but usually cause issues like short lifespan, slow response, and frequent check engine lights.

We only sell new, high-quality, fully tested sensors.

Q8: How can I avoid buying a refurbished or used auto part?

Check for scratches on the connector, dirty wiring, or marks on threads.

Our parts are 100% brand new, never refurbished, and fully tested.

🧰 4. Installation & Usage

Q9: Can I install an oxygen sensor myself?

Yes. Difficulty: medium.

You'll need an O2 sensor socket, Anti-seize compound, and a Torque wrench. We recommend clearing fault codes with an OBD scanner after installation.

Q10: Do ignition coils need programming after replacement?

In most vehicles, no programming is required. Just swap the old coil with the new one.

💰 5. Value & Performance

Q11: Your parts cost less than Other accessories. Are they really reliable?

Yes—our parts use the same-grade materials and testing standards as suppliers. Because we don't go through dealer channels, the price is much more affordable.

About us

Since its inception, Automotive Leader has been guided by a simple mission: to provide high-performance aftermarket parts for automotive technicians and DIY enthusiasts.

The website is jointly operated by Trademark Name: Automotive-leader Store registered at Physical Address: Room 602, No. 152 Helong East Road, Helong Subdistrict, Baiyun District, Guangzhou City Postal Code: 510000 and Company name：BLUE STAR TRADING LIMITED registered at Company address：RM C，6/F，WORLD TRUST TOWER 50 STANLEY STREET CENTRAL HK

U.S. Address:
7600 LTC Parkway 34986
PORT SAINT LUCIE, FL - United States

Phone Number: +86 15812449181

Email: support@automotive-leaderstore.com

Logistics Policy

1. U.S. Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 3-6 business days via USPS/UPS/FedEx.

2. China Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 14-22 business days via USPS/UPS/FedEx.

Refund and Return Policy

30-Day Returns and Refunds / Return shipping is free（Due to a product issue）

We do not accept direct exchanges.

After receiving and inspecting your returned item, we will notify you whether your refund has been approved.

If approved, the refund will be processed back to your original payment method within 5 business days.

Please note that your bank or credit card company may also require additional time to process and reflect the refund.

If you have not received your refund within 10 business days after your return request has been approved, please contact us.

Contact: support@automotive-leaderstore.com

Account

Automotive Sensors

Filters

Upstream 5-Wire Wideband A/F Sensor for Mazda 6 2.0L MZR (2010-2012) | LFDC188G1

2Pcs Air Fuel Ratio & O2 Sensor for Toyota Sienna V6 (2004-2010 FWD Only) | 234-9012 234-4516

2Pcs Air Fuel Ratio & O2 Sensor for Mazda 3 2.0L (2010-2013) | 234-5015 234-4467

2Pcs Wideband A/F & O2 Sensor for Mercedes C250 SLK250 1.8L Turbo (2012-2015) | 234-5064 234-4585

2Pcs Air Fuel Ratio & O2 Sensor for Mazda 2 1.5L (2011-2013) | 234-9103 234-4329

2Pcs Upstream Oxygen Sensor for Nissan 350Z Titan Infiniti G35 | 234-9038

2Pcs Air Fuel Ratio & O2 Sensor for Land Rover Range Rover 4.2L 4.4L V8 (2006-2009) | 234-9074 234-4266

2Pcs Air Fuel Ratio & O2 Sensor for Toyota Prius & Prius V 1.8L Hybrid (2010-2016) | 234-9090 234-4400

2Pcs Air Fuel Ratio & O2 Sensor for Subaru Legacy Outback 2.5L (2015) | 234-9138 234-4907

4Pcs Air Fuel Ratio & O2 Sensor Set for Lexus GS350 (2014-2015) | 234-9140 234-9145 2*234-4945

2Pcs Air Fuel Ratio & O2 Sensor for Nissan Sentra 1.8L (2013-2019) | 234-9134 234-4905

4Pcs Air Fuel Ratio & O2 Sensor Set for Nissan Murano 3.5L V6 (2012-2014 AWD Only) | 234-9106 234-4595

2Pcs Air Fuel Ratio & O2 Sensor for Nissan Murano 3.5L V6 (2012-2014 AWD Only) | 234-9106 234-4595

Upstream Wideband A/F Sensor for Mazda MX-5 Miata 2.0L (2009-2015) | 234-9093

Upstream Air Fuel Ratio Sensor for Mercedes ML350 GL350 Freightliner Sprinter | 234-5046

Upstream O2 Sensor for Chevy Aveo & Pontiac G3 (2009-2011) | 234-4290

Downstream Lambda O2 Sensor for Audi A4 A6 Q7 Quattro | 234-4414

Upstream Air Fuel Ratio Sensor for Mercedes C300 E350 CLA250 & Infiniti QX30 | 234-5158

2Pcs Air Fuel Ratio & O2 Sensor for Mercedes CLA250 GLA250 & Infiniti QX30 2.0L Turbo | 234-5158 234-4839

Downstream O2 Sensor for Audi A4 Q5 Q7 VW Porsche Cayenne | 234-4754

4Pcs Wideband A/F & O2 Sensor Set for Mercedes C300 E350 GLK350 3.5L V6 | 234-5065 234-4559

Upstream Air Fuel Ratio Sensor for Toyota 4Runner Tundra & Lexus IS250 | 234-9144

4Pcs Upstream Downstream Oxygen O2 Sensor for 2003 BMW 325Ci 325i 330Ci 330i 525i 2.5L 3.0L BMW X3 L6 3.0L | 234-5137 234-4473

4Pcs Oxygen Sensor for Buic k Rainier, Chevro let Malibu Silverado SSR Trailblazer, Gmc Envoy Sierra, Isuzu Ascender, Pontia c G6 | 234-4668 234-4651

Subscribe to our email list to receive a VIP discount

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy

Country/Region

Country/Region

Automotive Sensors

Filters

Upstream 5-Wire Wideband A/F Sensor for Mazda 6 2.0L MZR (2010-2012) | LFDC188G1

2Pcs Air Fuel Ratio & O2 Sensor for Toyota Sienna V6 (2004-2010 FWD Only) | 234-9012 234-4516

2Pcs Air Fuel Ratio & O2 Sensor for Mazda 3 2.0L (2010-2013) | 234-5015 234-4467

2Pcs Wideband A/F & O2 Sensor for Mercedes C250 SLK250 1.8L Turbo (2012-2015) | 234-5064 234-4585

2Pcs Air Fuel Ratio & O2 Sensor for Mazda 2 1.5L (2011-2013) | 234-9103 234-4329

2Pcs Upstream Oxygen Sensor for Nissan 350Z Titan Infiniti G35 | 234-9038

2Pcs Air Fuel Ratio & O2 Sensor for Land Rover Range Rover 4.2L 4.4L V8 (2006-2009) | 234-9074 234-4266

2Pcs Air Fuel Ratio & O2 Sensor for Toyota Prius & Prius V 1.8L Hybrid (2010-2016) | 234-9090 234-4400

2Pcs Air Fuel Ratio & O2 Sensor for Subaru Legacy Outback 2.5L (2015) | 234-9138 234-4907

4Pcs Air Fuel Ratio & O2 Sensor Set for Lexus GS350 (2014-2015) | 234-9140 234-9145 2*234-4945

2Pcs Air Fuel Ratio & O2 Sensor for Nissan Sentra 1.8L (2013-2019) | 234-9134 234-4905

4Pcs Air Fuel Ratio & O2 Sensor Set for Nissan Murano 3.5L V6 (2012-2014 AWD Only) | 234-9106 234-4595

2Pcs Air Fuel Ratio & O2 Sensor for Nissan Murano 3.5L V6 (2012-2014 AWD Only) | 234-9106 234-4595

Upstream Wideband A/F Sensor for Mazda MX-5 Miata 2.0L (2009-2015) | 234-9093

Upstream Air Fuel Ratio Sensor for Mercedes ML350 GL350 Freightliner Sprinter | 234-5046

Upstream O2 Sensor for Chevy Aveo & Pontiac G3 (2009-2011) | 234-4290

Downstream Lambda O2 Sensor for Audi A4 A6 Q7 Quattro | 234-4414

Upstream Air Fuel Ratio Sensor for Mercedes C300 E350 CLA250 & Infiniti QX30 | 234-5158

2Pcs Air Fuel Ratio & O2 Sensor for Mercedes CLA250 GLA250 & Infiniti QX30 2.0L Turbo | 234-5158 234-4839

Downstream O2 Sensor for Audi A4 Q5 Q7 VW Porsche Cayenne | 234-4754

4Pcs Wideband A/F & O2 Sensor Set for Mercedes C300 E350 GLK350 3.5L V6 | 234-5065 234-4559

Upstream Air Fuel Ratio Sensor for Toyota 4Runner Tundra & Lexus IS250 | 234-9144

4Pcs Upstream Downstream Oxygen O2 Sensor for 2003 BMW 325Ci 325i 330Ci 330i 525i 2.5L 3.0L BMW X3 L6 3.0L | 234-5137 234-4473

4Pcs Oxygen Sensor for Buic k Rainier, Chevro let Malibu Silverado SSR Trailblazer, Gmc Envoy Sierra, Isuzu Ascender, Pontia c G6 | 234-4668 234-4651

Subscribe to our email list to receive a VIP discount

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy