1. Exhaust & Emission Parts To Buy
  2. sku: 21476392403051711
  3. ACDELCO 55510257

ACDELCO 55510257 Exhaust Temperature Sensor

fits year: 2020–2021.

55510257 Acdelco Oe Exhaust Temperature Sensor

( Brand: Acdelco ), ( Manufacturer Part Number: 55510257 ), ( Part Type: Exhaust Sensor ), ( Make: Cadillac ), ( Year: 2020 2021 ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included )

Review ACDELCO Oe Exhaust Temperature Sensor fits 2020–2021

The **ACDelco 55510257 Exhaust Temperature Sensor** is a high-performance, precision-engineered component designed to ensure optimal vehicle performance, emissions compliance, and engine protection across a wide range of General Motors applications. Part of ACDelco s trusted line of OE-quality replacement parts, this sensor is meticulously crafted to meet or exceed the original equipment standards, delivering reliable and consistent operation in demanding driving conditions. Engineered with a robust stainless steel housing and a durable ceramic tip, the 55510257 is built to withstand extreme heat, corrosion, and mechanical stress, making it an ideal long-term solution for modern turbocharged, diesel, and gasoline engines. Its advanced thermocouple design ensures accurate temperature readings, allowing the vehicle s engine control module (ECM) to precisely monitor exhaust gas temperatures (EGT) and adjust fuel delivery, turbocharger boost, and emissions control systems accordingly. This precision is critical for maintaining optimal combustion efficiency, reducing harmful emissions, and preventing costly engine damage from overheating or detonation. Whether installed in a heavy-duty truck, a performance-oriented SUV, or a high-mileage vehicle, the ACDelco 55510257 provides dependable functionality, helping to extend engine life and improve overall drivability. Backed by ACDelco s reputation for quality and compatibility, this sensor is a straightforward, cost-effective upgrade for mechanics and DIY enthusiasts seeking a reliable replacement for worn or faulty OEM sensors.

**Pros and Cons of buying a ACDelco 55510257 Exhaust Temperature Sensor**

**Pros:**

1. **OEM Quality and Compatibility** The ACDelco brand is a trusted manufacturer of aftermarket automotive parts, known for producing components that meet or exceed original equipment manufacturer (OEM) standards. This sensor is designed specifically for compatibility with certain General Motors vehicles, ensuring a proper fit and reliable performance.

2. **Cost-Effective Alternative** Compared to purchasing an OEM sensor directly from a dealership, the ACDelco version is significantly cheaper. This makes it an attractive option for budget-conscious consumers who still want a high-quality replacement part.

3. **Reliability and Durability** ACDelco sensors are engineered to withstand the harsh conditions of an engine bay, including high temperatures and vibrations. Many users report that this sensor performs reliably over an extended period, reducing the likelihood of frequent replacements.

4. **Easy Installation** The sensor is designed to be a straightforward replacement, often requiring only basic tools. The installation process typically involves removing the old sensor, cleaning the mounting area, and securing the new one in place. Detailed instructions are usually provided with the part.

5. **Warranty Coverage** ACDelco parts often come with a manufacturer s warranty, providing some assurance against defects or premature failure. This can offer peace of mind, especially if the sensor fails shortly after installation.

6. **Wide Availability** As an aftermarket brand, ACDelco sensors are widely stocked by auto parts retailers, both online and in physical stores. This makes it easier to purchase quickly, even if you need to replace the sensor on short notice.

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**Cons:**

1. **Potential Quality Variations** While ACDelco is a reputable brand, there is a risk of receiving a counterfeit or lower-quality sensor, especially if purchased from untrusted sellers. Counterfeit parts may not perform as expected and could lead to further engine issues or failure.

2. **Limited Warranty Compared to OEM** The warranty on aftermarket parts is often shorter than the warranty provided with OEM components. If the sensor fails within the warranty period, you may still face out-of-pocket costs for labor or additional parts.

3. **Compatibility Concerns** Although ACDelco sensors are designed for specific GM vehicles, there is always a small chance of fitment issues, particularly if the vehicle has been modified or if the sensor is being installed in an unusual location. Always verify compatibility with your vehicle s make, model, and year before purchasing.

4. **No Dealership Support** If issues arise with the sensor, you will not have access to dealership resources or warranties. Troubleshooting and repairs may require additional research or professional assistance, which could incur extra costs.

5. **Mixed User Experiences** While many users report positive experiences with ACDelco sensors, others have encountered issues such as premature failure, inaccurate readings, or difficulty installing the sensor due to design quirks. Individual experiences can vary based on the specific vehicle and driving conditions.

6. **Potential for Overheating or Performance Issues** A faulty exhaust temperature sensor can lead to incorrect readings, which may trigger warning lights or cause the engine control unit (ECU) to adjust fuel delivery or timing improperly. This could result in reduced performance, poor fuel economy, or even engine damage if the issue is ignored.

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**Conclusion:**

The ACDelco 55510257 exhaust temperature sensor is a solid choice for consumers seeking a high-quality, cost-effective replacement part for their GM vehicle. Its OEM-like performance, reliability, and widespread availability make it a practical option for most drivers. However, potential buyers should be cautious about purchasing from untrusted sources to avoid counterfeit products and should verify compatibility with their specific vehicle. While the warranty may not be as extensive as an OEM part, the overall value and performance typically justify the purchase for many users.

**Recommendation:**

If you are replacing an exhaust temperature sensor in a GM vehicle and have confirmed that the ACDelco 55510257 is the correct part for your model, purchasing it from a reputable retailer such as AutoZone, O Reilly Auto Parts, or a trusted online marketplace is a wise decision. To minimize risks, ensure the sensor is new and not refurbished or counterfeit. If you are unsure about installation or encounter issues, consult a professional mechanic to avoid potential problems. For vehicles with complex modifications or rare models, consider verifying compatibility with the manufacturer or a trusted automotive forum before making the purchase. Overall, the ACDelco sensor offers a strong balance of quality and affordability for most drivers.

Details:

Found a Better Price. If you would like to return your new, unopened, and uninstalled part: Request a Return. Just Didn't Like it.

Electrical parts are not returnable. Changed My Mind. The temperature signal is used by the control module to adjust fuel delivery and boost pressure help protect exhaust after-treatment components from overheating keep them operating efficiently. 1.Parts must be resalable and in the original packaging.

Add details like I tried to install this part, and it didn't fit. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

part #: 55510257 price

  • $43.25

specifications emissyste:

  • for years: 2020-2021
  • brand: Acdelco
  • mpn: 55510257
  • part type: Exhaust Sensor
  • make: Cadillac
  • year: 2020 2021
  • parts included: Only Part Reference 0 On The Diagram Is Included

shipping emissyste:

  • class: Standard
  • service: UPS Ground
  • cost: $10.95
  • carrier: UPS
  • type: Fixed
  • transit: 5-11 Days

payments emissyste:

  • wallet: Apple-pay
  • other
  • credit card: Discover

offer emissyste:

  • started: April 18, 2026
  • quantity: 2
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0

returns emissyste:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted

general emissyste:

  • Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
  • condition: New

seller emissyste:

  • city: Pompano Beach, Florida
  • # reviews: 4398
  • rating: 99.7%
for years: 2020-2021, part type: exhaust sensor, year: 2020 2021, parts included: only part reference 0 on the diagram is included,
manufacturer: cadillac, category: auto parts > car truck parts accessories > exhaust emission systems > exhaust emission parts, sku: 21476392403051711,
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