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Cadillac

Your Cadillac deserves high-quality maintenance. Explore our collection of premium aftermarket parts designed to resolve engine issues and improve fuel delivery. We prioritize durability and exact specifications so you can drive with absolute peace of mind.

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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.

3.UK Warehouse (Standard Option)

Handling time: 1-3 business days.

Transit time (days): 3-7 business days via Royal Mail/UPS/FedEx/DPD.

4.Canada Warehouse (Standard Option)

Handling time: 1-3 business days.

Transit time (days): 3-7 business days via Canada Post/UPS/FedEx.

5.German Warehouse (Standard Option)

Handling time: 1-3 business days.

Transit time (days): 3-7 business days via DHL/UPS/FedEx/DPD.

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

Cadillac

Filters

4Pcs Oxygen Sensor for Chevy Silverado & GMC Sierra 1500/2500 (2003-2006) | 234-4669 234-4407

4Pcs O2 Sensor for Chevy Silverado Tahoe GMC Sierra Escalade (14-18)| 234-4940, 234-4974

4Pcs Oxygen Sensor Set for GMC Yukon & Sierra 1500/2500 (2008-2014) | 234-4256 234-4668

2Pcs O2 Sensor for Chevy Silverado Tahoe GMC Sierra | 234-4940 234-4974

2Pcs Downstream O2 Sensor for Cadillac Escalade Chevy Silverado GMC Yukon | 234-4256

4Pcs O2 Sensor Set for Cadillac CTS SRX STS (2004-2006) | 234-5002 234-4818

Suitable for 2Pcs Upstream Left & Right O2 Sensor for Buick Enclave Chevy Traverse GMC Acadia | 234-4815

Upstream O2 Sensor for Chevy Silverado Tahoe GMC Sierra Yukon (03-10)| 234-4669

4Pcs O2 Sensor Set for Chevy Silverado Tahoe & GMC Sierra Yukon | 234-4668

Suitable for Universal Heated O2 Sensor for Chevy Silverado & Tahoe (2003-2005) | 234-4668 12583804

Upstream Wideband A/F Sensor for Audi S5 S6 & Cadillac CTS SRX (2004-2012) | 234-5110, 07L906262K, 12588879

Downstream O2 Sensor for Chevy Camaro Corvette Silverado Cadillac CTS | 234-8080, 12655677

Upstream O2 Sensor for Chevy Camaro Corvette Silverado Cadillac CTS CT6 | 234-8085

Suitable for Upstream Left Side O2 Sensor for Chevy GMC Cadillac | 15150, 234-4337

EVAP Emissions Leak Detection Pump (LDP) for Chevy Volt Malibu Cadillac | 310-007 22865478

Suitable for Fuel Injector for Chevy Terrain GMC Cadillac CTS SRX Buick 3.0L 3.6L | 12629927 12642021

Suitable for Fuel Injector for Chevy Camaro Traverse GMC Acadia Cadillac 3.6L V6 | 12638530 FJ994

8Pcs Fuel Injector Set for Chevy Silverado Tahoe GMC Sierra 4.8L 5.3L 6.0L V8 | 17113553 FJ315

Suitable for 8Pcs Fuel Injector Set for Chevy Silverado Tahoe GMC Sierra V8 | 12613411

2Pcs O2 Sensor for Chevy Blazer Camaro GMC 2.0L 2.5L (2013-2015) | 234-8080 234-8085

Suitable for Downstream O2 Sensor for Chevy Silverado Express C1500 K1500 GMC Sierra | 234-4018

Suitable for 2Pcs O2 Sensor for Chevy Malibu Camaro Impala 2.5L (2013-2017) | 234-4763 234-4762

Suitable for 2Pcs O2 Sensor Up & Down for Cadillac DeVille Eldorado Seville (2000-2003) | 234-4650 234-4651

Suitable for 2Pcs Upstream O2 Sensor for Buick Lucerne Cadillac DTS 4.6L V8 | 234-4339

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

Cadillac

Filters

4Pcs Oxygen Sensor for Chevy Silverado & GMC Sierra 1500/2500 (2003-2006) | 234-4669 234-4407

4Pcs O2 Sensor for Chevy Silverado Tahoe GMC Sierra Escalade (14-18)| 234-4940, 234-4974

4Pcs Oxygen Sensor Set for GMC Yukon & Sierra 1500/2500 (2008-2014) | 234-4256 234-4668

2Pcs O2 Sensor for Chevy Silverado Tahoe GMC Sierra | 234-4940 234-4974

2Pcs Downstream O2 Sensor for Cadillac Escalade Chevy Silverado GMC Yukon | 234-4256

4Pcs O2 Sensor Set for Cadillac CTS SRX STS (2004-2006) | 234-5002 234-4818

Suitable for 2Pcs Upstream Left & Right O2 Sensor for Buick Enclave Chevy Traverse GMC Acadia | 234-4815

Upstream O2 Sensor for Chevy Silverado Tahoe GMC Sierra Yukon (03-10)| 234-4669

4Pcs O2 Sensor Set for Chevy Silverado Tahoe & GMC Sierra Yukon | 234-4668

Suitable for Universal Heated O2 Sensor for Chevy Silverado & Tahoe (2003-2005) | 234-4668 12583804

Upstream Wideband A/F Sensor for Audi S5 S6 & Cadillac CTS SRX (2004-2012) | 234-5110, 07L906262K, 12588879

Downstream O2 Sensor for Chevy Camaro Corvette Silverado Cadillac CTS | 234-8080, 12655677

Upstream O2 Sensor for Chevy Camaro Corvette Silverado Cadillac CTS CT6 | 234-8085

Suitable for Upstream Left Side O2 Sensor for Chevy GMC Cadillac | 15150, 234-4337

EVAP Emissions Leak Detection Pump (LDP) for Chevy Volt Malibu Cadillac | 310-007 22865478

Suitable for Fuel Injector for Chevy Terrain GMC Cadillac CTS SRX Buick 3.0L 3.6L | 12629927 12642021

Suitable for Fuel Injector for Chevy Camaro Traverse GMC Acadia Cadillac 3.6L V6 | 12638530 FJ994

8Pcs Fuel Injector Set for Chevy Silverado Tahoe GMC Sierra 4.8L 5.3L 6.0L V8 | 17113553 FJ315

Suitable for 8Pcs Fuel Injector Set for Chevy Silverado Tahoe GMC Sierra V8 | 12613411

2Pcs O2 Sensor for Chevy Blazer Camaro GMC 2.0L 2.5L (2013-2015) | 234-8080 234-8085

Suitable for Downstream O2 Sensor for Chevy Silverado Express C1500 K1500 GMC Sierra | 234-4018

Suitable for 2Pcs O2 Sensor for Chevy Malibu Camaro Impala 2.5L (2013-2017) | 234-4763 234-4762

Suitable for 2Pcs O2 Sensor Up & Down for Cadillac DeVille Eldorado Seville (2000-2003) | 234-4650 234-4651

Suitable for 2Pcs Upstream O2 Sensor for Buick Lucerne Cadillac DTS 4.6L V8 | 234-4339

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