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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 Wideband A/F Sensor for Audi R8 RS4 S8 A8 VW Touareg (2006-2015) | 234-5114, 06E906262L

Downstream O2 Sensor for Mazda CX-5 CX-9 2.0L 2.5L (2013-2024) | 234-4583, 250-241074

Upstream Wideband A/F Sensor for Bentley Continental Porsche Cayenne (06-18) | 234-5119

Upstream Wideband A/F Sensor for Mercedes CLS63 E63 AMG V8 (2012-2014) | 234-5066

Upstream O2 Sensor for Porsche 911 Saab 900 Volvo 850 (1993-2001) | 234-4182

Upstream Wideband A/F Sensor for Mercedes C300 E350 3.5L V6 (2012-2016) | 234-5065

4Pcs Air Fuel Ratio & O2 Sensor Set for Infiniti FX50 5.0L V8 (2009-2012) | 234-9079, 234-4380

Downstream O2 Sensor for Lexus IS250 IS350 2.5L 3.5L V6 (2006-2013) | 234-4518

2Pcs Air Fuel Ratio & O2 Sensor for Honda Civic 1.8L (2006) | 234-9126, 234-4350

Upstream Wideband A/F Sensor for VW Jetta Golf Audi A4 TT | 234-5115

2Pcs Downstream O2 Sensor for Nissan Altima Rogue Sentra 350Z | 234-4380

Downstream O2 Sensor for Lexus IS350 GS350 RC F GS F 5.0L V8 | 234-4945, 8946553290, 8946553300

7G9N-12B579-AB Mass Air Flow Sensor Replacement for Land Rover 5.0L Jaguar XF XJ Volvo S60 3.0L 7G9N12B579AB AF10554 197400-6140

Coolant Temperature Sensor Fit for Yamaha PWC FX VX | Fit for FZR FZS GP EX VX VXR VXS WAVERUNNER Jet Boat AR SX SR 242 212S 2006-2015 Replace 61A-85790-00-00 61A-85790-01-00

Oxygen Sensor Upstream O2, Compatible with Acura MDX RDX RL RLX TL TLX 18083, 365315G0A11 Replacement

GC3Z-5L239-A Diesel Particulate Sensor for Ford F-250 F-350 2015-2016 | GC3Z5L239A，GC3Z-5L239-B

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 Wideband A/F Sensor for Audi R8 RS4 S8 A8 VW Touareg (2006-2015) | 234-5114, 06E906262L

Downstream O2 Sensor for Mazda CX-5 CX-9 2.0L 2.5L (2013-2024) | 234-4583, 250-241074

Upstream Wideband A/F Sensor for Bentley Continental Porsche Cayenne (06-18) | 234-5119

Upstream Wideband A/F Sensor for Mercedes CLS63 E63 AMG V8 (2012-2014) | 234-5066

Upstream O2 Sensor for Porsche 911 Saab 900 Volvo 850 (1993-2001) | 234-4182

Upstream Wideband A/F Sensor for Mercedes C300 E350 3.5L V6 (2012-2016) | 234-5065

4Pcs Air Fuel Ratio & O2 Sensor Set for Infiniti FX50 5.0L V8 (2009-2012) | 234-9079, 234-4380

Downstream O2 Sensor for Lexus IS250 IS350 2.5L 3.5L V6 (2006-2013) | 234-4518

2Pcs Air Fuel Ratio & O2 Sensor for Honda Civic 1.8L (2006) | 234-9126, 234-4350

Upstream Wideband A/F Sensor for VW Jetta Golf Audi A4 TT | 234-5115

2Pcs Downstream O2 Sensor for Nissan Altima Rogue Sentra 350Z | 234-4380

Downstream O2 Sensor for Lexus IS350 GS350 RC F GS F 5.0L V8 | 234-4945, 8946553290, 8946553300

7G9N-12B579-AB Mass Air Flow Sensor Replacement for Land Rover 5.0L Jaguar XF XJ Volvo S60 3.0L 7G9N12B579AB AF10554 197400-6140

Coolant Temperature Sensor Fit for Yamaha PWC FX VX | Fit for FZR FZS GP EX VX VXR VXS WAVERUNNER Jet Boat AR SX SR 242 212S 2006-2015 Replace 61A-85790-00-00 61A-85790-01-00

Oxygen Sensor Upstream O2, Compatible with Acura MDX RDX RL RLX TL TLX 18083, 365315G0A11 Replacement

GC3Z-5L239-A Diesel Particulate Sensor for Ford F-250 F-350 2015-2016 | GC3Z5L239A，GC3Z-5L239-B

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