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Engine Sensors & Electronics

Your vehicle's electronic systems are the brain of the engine. From MAF flowmeters to ABS speed sensors, we offer a vast range of diagnostic and engine management electronics. Our parts deliver accurate data to your ECU, ensuring smoother operation, safer braking, and pinpoint accuracy for your vehicle's electronic systems.

（ MAF, Nox, ABS, EGT, Parking etc.）

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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

whatsAPP Number: +86 18316212443

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

Engine Sensors & Electronics

Filters

NOx Nitrogen Oxide Sensor for Chevy Silverado & GMC Sierra 2500 3500 HD 6.6L (2014-2016) | 12648631

Downstream NOx Nitrogen Oxide Sensor for Ram 2500 3500 4500 5500 6.7L L6 (2014-2017) | 68227486AA

Mass Air Flow MAF Sensor for Land Rover 5.0L Jaguar XF & Volvo S60 3.0L | 7G9N-12B579-AB

2Pcs NOx Nitrogen Oxide Sensor Set for Mercedes ML350 & GL350 3.0L Diesel (2007-2014) | A0009053503 A0009053603

Suitable for Front ABS Wheel Speed Sensor for Harley Davidson CVO Road Glide | 32700015

2Pcs O2 Sensor Up/Down for Chevy Equinox GMC Terrain 2.4L | 234-4242 234-4530

NOx Sensor 8-Wire for Mercedes Sprinter 2500/3500/E250/ML250/GL350 BlueTEC (14-16) | A0009053503 5WK96682D

Upstream NOx Nitrogen Oxide Sensor for Freightliner Cascadia DD13 DD15 (2012-2022) | A0101532228, 5WK96656B

Rear NOx Nitrogen Oxide Sensor for BMW X3 F25 & E90 335d Diesel (2009-2016) | 13628589845

Mass Air Flow MAF Sensor for Honda Accord & CR-V (2016-2020) | 37980-5BA-A01

D5S HID Xenon Headlight Bulb for Audi A4 A6 & Chevy Equinox | 9285410171

NOx Nitrogen Oxide Sensor for Mercedes-Benz Sprinter 2500 3500 B907 B910 | A0009054014

Downstream NOx Nitrogen Oxide Sensor for Jeep Grand Cherokee & Ram ProMaster (2017-2019) | 68146138AC

NOx Nitrogen Oxide Sensor for Ford F-250 F-350 Super Duty 6.7L Diesel | HC3A-5E145-BD

Front Upstream NOx Trap Temperature Sensor for Ford F-250 Super Duty 6.7L V8 Diesel (2013-2016) | DC3Z-9D378-A

Upstream Nox Sensor For Chevrolet Silverado GMC Sierra 2500 3500 2020-2023 | 12708005

Upstream NOx Nitrogen Oxide Sensor for Chevy Colorado & GMC Canyon 2.8L (2016-2019) | 55500841, 55495040

NOx Nitrogen Oxide Sensor for Mercedes-Benz Detroit Diesel DD13 DD15 DD16 | A0101538128

NOx Nitrogen Oxide Sensor for Mercedes ML GL CLS S-Class (W164/W166) | A0009055206

PDC Parking Assist Sensor for Toyota Mirai & Lexus CT200h ES300h | 89341-78010

NOx Nitrogen Oxide Sensor for Mercedes GLC X253 S-Class W222 | A0009050008 5WK96681D

Downstream NOx Sensor for Ram 1500 3.0L EcoDiesel 3.6L 5.7L | 68171188AA

Suitable for 2Pcs NOx Sensor Set for Freightliner Cascadia Western Star DD13 DD15 Engine | A0101532228 A0101532328

Downstream NOx Sensor for Audi Q7 VW Touareg 3.0L TDI Diesel | 059907807B, 059907807D

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

Engine Sensors & Electronics

Filters

NOx Nitrogen Oxide Sensor for Chevy Silverado & GMC Sierra 2500 3500 HD 6.6L (2014-2016) | 12648631

Downstream NOx Nitrogen Oxide Sensor for Ram 2500 3500 4500 5500 6.7L L6 (2014-2017) | 68227486AA

Mass Air Flow MAF Sensor for Land Rover 5.0L Jaguar XF & Volvo S60 3.0L | 7G9N-12B579-AB

2Pcs NOx Nitrogen Oxide Sensor Set for Mercedes ML350 & GL350 3.0L Diesel (2007-2014) | A0009053503 A0009053603

Suitable for Front ABS Wheel Speed Sensor for Harley Davidson CVO Road Glide | 32700015

2Pcs O2 Sensor Up/Down for Chevy Equinox GMC Terrain 2.4L | 234-4242 234-4530

NOx Sensor 8-Wire for Mercedes Sprinter 2500/3500/E250/ML250/GL350 BlueTEC (14-16) | A0009053503 5WK96682D

Upstream NOx Nitrogen Oxide Sensor for Freightliner Cascadia DD13 DD15 (2012-2022) | A0101532228, 5WK96656B

Rear NOx Nitrogen Oxide Sensor for BMW X3 F25 & E90 335d Diesel (2009-2016) | 13628589845

Mass Air Flow MAF Sensor for Honda Accord & CR-V (2016-2020) | 37980-5BA-A01

D5S HID Xenon Headlight Bulb for Audi A4 A6 & Chevy Equinox | 9285410171

NOx Nitrogen Oxide Sensor for Mercedes-Benz Sprinter 2500 3500 B907 B910 | A0009054014

Downstream NOx Nitrogen Oxide Sensor for Jeep Grand Cherokee & Ram ProMaster (2017-2019) | 68146138AC

NOx Nitrogen Oxide Sensor for Ford F-250 F-350 Super Duty 6.7L Diesel | HC3A-5E145-BD

Front Upstream NOx Trap Temperature Sensor for Ford F-250 Super Duty 6.7L V8 Diesel (2013-2016) | DC3Z-9D378-A

Upstream Nox Sensor For Chevrolet Silverado GMC Sierra 2500 3500 2020-2023 | 12708005

Upstream NOx Nitrogen Oxide Sensor for Chevy Colorado & GMC Canyon 2.8L (2016-2019) | 55500841, 55495040

NOx Nitrogen Oxide Sensor for Mercedes-Benz Detroit Diesel DD13 DD15 DD16 | A0101538128

NOx Nitrogen Oxide Sensor for Mercedes ML GL CLS S-Class (W164/W166) | A0009055206

PDC Parking Assist Sensor for Toyota Mirai & Lexus CT200h ES300h | 89341-78010

NOx Nitrogen Oxide Sensor for Mercedes GLC X253 S-Class W222 | A0009050008 5WK96681D

Downstream NOx Sensor for Ram 1500 3.0L EcoDiesel 3.6L 5.7L | 68171188AA

Suitable for 2Pcs NOx Sensor Set for Freightliner Cascadia Western Star DD13 DD15 Engine | A0101532228 A0101532328

Downstream NOx Sensor for Audi Q7 VW Touareg 3.0L TDI Diesel | 059907807B, 059907807D

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