EPSIRMP 68171187AA Upstream Nox Nitrogen Oxide Sensor Probe

( Brand: Epsirmp ), ( Manufacturer Part Number: 68171187AA ), ( Part Type: Sensor Probe )

Review EPSIRMP Upstream Nox Nitrogen Oxide Sensor Probe Compatible

The **EPS Epirimp 68171187AA Upstream NOx Nitrogen Oxide Sensor Probe (2016 2019 Models)** is a high-performance, factory-original replacement sensor designed to meet or exceed OEM specifications for modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. This precision-engineered probe is specifically tailored for vehicles manufactured between 2016 and 2019, ensuring seamless compatibility with aftertreatment components such as diesel particulate filters (DPFs) and SCR catalysts. Crafted from durable, corrosion-resistant materials, the sensor features a robust titanium or stainless-steel housing with a hermetically sealed ceramic element, guaranteeing long-term reliability even in harsh operating conditions. The upstream NOx sensor operates by measuring real-time nitrogen oxide (NOx) emissions in the exhaust stream, providing critical data to the engine control module (ECM) to optimize fuel delivery, reduce emissions, and enhance overall system efficiency. Its advanced design incorporates a heated tip to prevent condensation buildup and ensure accurate readings across a wide temperature range, from cold starts to high-load conditions. Whether installed on light-duty or medium-duty diesel applications, this sensor delivers precise diagnostics, helping maintain compliance with emissions regulations while extending the lifespan of the aftertreatment system. Ideal for professional mechanics, fleet operators, or DIY enthusiasts, the EPS Epirimp 68171187AA is a direct-fit solution that restores factory performance and reliability with minimal installation effort.

### **Pros and Cons of buying a EPSIRMP 68171187AA Upstream NOx Nitrogen Oxide Sensor Probe (2016 2019 Models)**

1. **OEM or High-Quality Aftermarket Part** The EPSIRMP 68171187AA is likely an original equipment manufacturer (OEM) or a high-quality aftermarket replacement designed to match factory specifications. This ensures better compatibility and performance compared to generic or low-quality alternatives.

2. **Direct Fit for Specific Vehicles** This sensor is explicitly listed for 2016 2019 model years, meaning it should align with the exact mounting location, wiring, and connector type required for your vehicle. Avoiding mismatched sensors reduces the risk of installation errors.

3. **Improves Emissions Compliance** NOx sensors monitor nitrogen oxide emissions, which are critical for passing emissions tests (especially in regions with strict regulations like California or Europe). A faulty sensor can trigger check engine lights (CEL) and fail inspections, so replacing it ensures proper function.

4. **Prevents Engine Misfires or Performance Issues** A failing NOx sensor can cause the engine control unit (ECU) to misinterpret exhaust data, leading to incorrect fuel delivery, reduced power, or rough idling. Replacing it restores optimal engine performance.

5. **Long-Term Reliability** If the sensor is genuine or from a reputable brand, it should last as long as the original (typically 60,000 100,000 miles or more, depending on driving conditions). This reduces the likelihood of repeated replacements.

6. **Easy Installation** Since it s a direct-fit part, installation is straightforward for those with basic mechanical skills. It usually involves unplugging the old sensor, removing it, and securing the new one in place.

7. **Warranty Coverage** Many reputable sellers offer warranties (e.g., 6 12 months or lifetime), providing peace of mind against defects.

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1. **Cost** High-quality NOx sensors can be expensive, often ranging from **$150 $300 ** depending on the brand, vehicle model, and whether labor is included. This may be a significant upfront investment.

2. **Potential Counterfeit Parts** If purchased from an untrusted seller (e.g., unverified online marketplaces), there s a risk of receiving a counterfeit or low-quality knockoff. These may fail prematurely or not function correctly.

3. **Complexity for Non-Mechanics** While installation is often simple, some vehicles (especially those with tight engine bays or complex wiring) may require careful handling. Those without mechanical experience might struggle or damage surrounding components.

4. **Diagnostic Confusion** If the sensor was failing intermittently, replacing it without confirming the exact issue (e.g., wiring problems, ECU glitches) could lead to the same problems recurring. Always verify the root cause with a scan tool before replacement.

5. **Limited Availability** Some aftermarket sensors may not be as widely stocked as common O2 sensors, leading to longer wait times or difficulty finding replacements if the original fails again.

6. **Potential for Overkill** If the sensor failure was due to a minor issue (e.g., loose connector, minor corrosion) rather than a worn-out sensor, replacing the entire unit may be unnecessary. A thorough inspection is recommended.

7. **Environmental and Handling Sensitivity** NOx sensors are precision instruments. Exposure to extreme heat, moisture, or physical damage during installation can shorten their lifespan.

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### **Conclusion**

The **EPSIRMP 68171187AA upstream NOx sensor probe** is a **reliable and necessary replacement** for vehicles experiencing NOx-related issues, particularly if you need to pass emissions tests or restore engine performance. Its **direct-fit design, compatibility with modern emissions systems, and potential to prevent further damage** make it a worthwhile investment for most owners of 2016 2019 models.

However, the **high cost, risk of counterfeit parts, and potential for installation challenges** mean it s not a decision to take lightly. **Prioritize purchasing from reputable sellers (e.g., official dealerships, trusted online retailers like Amazon, RockAuto, or parts specialists like Borla or Dorman)** to ensure quality. Additionally, **verify the exact issue with a diagnostic scan** before replacing to avoid unnecessary expenses.

If your vehicle is **frequently used in stop-and-go traffic, exposed to harsh conditions, or has a history of sensor failures**, consider **extended warranties or premium brands** for added peace of mind.

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- **Buy it if:** You ve confirmed the sensor is faulty via a scan tool, need emissions compliance, and want a direct-fit, high-quality replacement.

- **Avoid it if:** You suspect other issues (e.g., wiring, ECU) or are unsure about installation consult a mechanic first.

- Purchase from **verified sellers** (check reviews, return policies).

- Follow **manufacturer installation guidelines** carefully.

- Consider **professional installation** if unsure about handling the sensor.

- Monitor for **recurring issues** post-installation, as rare defects can occur.

For most owners, this is a **smart upgrade** that prevents larger problems down the road.

Details:

It can be installed successfully with a simple operation. Item model number: 68171187AA. Mounting Type: Flange Mount. Product Feature Made of high-quality materials, stable and reliable performance, meeting or exceeding the OE standards.

Installation Method Easy to install, direct replacement for your old or broken one. Manufacturer: EPSIRMP. Package Dimensions: 8.66 x 0.78 inches. 68171187AA Upstream Nox Nitrogen Oxide Sensor Probe Compatible with 2016 2019 Dodge Ram 1500 3.0L Diesel: Brand: EPSIRMP.

Upper Temperature Rating: 500 Degrees Celsius. Output Type: electrical signal.

part #: 68171187aa price

• $82.00

specifications caranten:

• brand: Epsirmp
• mpn: 68171187aa
• part type: Sensor Probe

payments caranten:

• wallet: Apple-pay
• other
• credit card: Diners-club

shipping caranten:

• class: Standard
• transit: 3-10 Days
• cost: $0.00
• type: Fixed
• service: Standard

offer caranten:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: February 9, 2026
• quantity: 1

seller caranten:

• # reviews: 391
• rating: 99.7%
• city: US

general caranten:

• Vehicle Electronics GPS > Car Electronics Accessories > Radio Antennas
• condition: New

returns caranten:

• policy: No Returns