MOPAR CERNY432AA Exhaust Particulate Matter Sensor 4384375

( Manufacturer Part Number: CERNY432AA ), ( Part Type: Particulate Exhaust Sensor ), ( Ipn: 4384375 ), ( Universal Fitment: Direct Replacement )

Review MOPAR New Oem Exhaust Particulate Matter Sensor

The **Mopar Cerny432AA Exhaust Particulate Matter (PM) Sensor** is a high-performance, factory-specification replacement sensor designed to meet or exceed the stringent emissions standards required by modern Chrysler, Dodge, Jeep, and Ram vehicles equipped with diesel engines, particularly those produced between the late 2010s and early 2020s. Engineered to integrate seamlessly with the aftermarket and OEM diesel powertrains such as the 3.0L EcoDiesel (CRD) and 6.7L Power Stroke (in select applications) this sensor plays a critical role in monitoring exhaust emissions by detecting and measuring particulate matter (soot) levels in real-time. Crafted from durable, corrosion-resistant materials, the Cerny432AA features a robust ceramic sensing element housed within a precision-machined stainless steel housing, ensuring long-term reliability even under the harshest operating conditions, including high-temperature exhaust streams and exposure to fuel additives or diesel exhaust fluid (DEF). Its advanced design incorporates a proprietary heating element to prevent clogging from soot buildup, maintaining consistent performance across a wide range of engine loads, from idle to full throttle. Ideal for applications where emissions compliance is non-negotiable such as fleet vehicles, heavy-duty trucks, or modified diesel engines this sensor is compatible with vehicles equipped with the **Cerny432** or **Cerny432A** original equipment sensors, making it a direct drop-in replacement without the need for additional calibration or programming. Whether restoring factory emissions performance after a sensor failure or upgrading an existing system for enhanced durability, the Mopar Cerny432AA delivers the precision and dependability expected from a genuine Mopar part, ensuring your diesel engine continues to meet emissions regulations while maximizing efficiency and longevity.

**Pros and Cons of buying a Mopar Cerny 432AA Exhaust Particulate Matter (PM) Sensor**

The Mopar Cerny 432AA is an aftermarket exhaust particulate matter sensor designed to replace the original equipment (OEM) sensor in diesel engines, particularly those in Ford, Ram, and Jeep vehicles equipped with diesel particulate filters (DPFs). Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Compatibility and Fitment**

The Cerny 432AA is specifically engineered to replace the OEM PM sensor in certain Ford, Ram, and Jeep diesel engines, including models like the 6.7L Power Stroke, 6.4L Cummins, and 3.0L EcoDiesel. It is designed to match the electrical and physical specifications of the original sensor, reducing the risk of installation issues.

2. **OEM-Quality Performance**

While it is an aftermarket part, the Cerny 432AA is manufactured to high standards and is often praised for its reliability and performance. Many users report that it functions similarly to the OEM sensor, providing accurate readings to the engine control module (ECM) and preventing false DPF regeneration cycles or check engine lights related to PM sensor failures.

3. **Cost-Effective Alternative to OEM**

Replacing a failed OEM PM sensor can be expensive, especially if the vehicle is out of warranty. The Cerny 432AA offers a more affordable solution without sacrificing quality, making it a practical choice for budget-conscious owners.

4. **Widely Available and Easy to Install**

This sensor is readily available through various online retailers and automotive parts stores. Installation is straightforward for those with basic mechanical skills, as it typically involves disconnecting the old sensor and plugging in the new one, though wiring and connector compatibility should be verified beforehand.

5. **Positive User Feedback**

Many diesel enthusiasts and mechanics recommend the Cerny 432AA for its durability and compatibility. Reviews often highlight its ability to resolve issues like DPF clogging alerts, rough idle, or reduced power caused by a faulty PM sensor.

6. **Warranty and Support**

Cerny Sensors, the manufacturer, offers warranties on their products, which can provide peace of mind in case of defects. Additionally, their customer support is often cited as responsive, though this can vary depending on the retailer.

---

### **Cons**

1. **Limited Compatibility**

While the Cerny 432AA is designed for specific Ford, Ram, and Jeep diesel models, it may not fit every vehicle with a DPF system. It is crucial to verify compatibility with your exact engine and model year before purchasing. Using an incompatible sensor could lead to installation failures or ECM errors.

2. **Potential for Counterfeit or Low-Quality Units**

The aftermarket diesel sensor market is not without its risks. Some sellers may offer counterfeit or low-quality replicas of the Cerny 432AA, which could fail prematurely or cause further issues. Purchasing from reputable retailers (such as RockAuto, Summit Racing, or authorized Cerny dealers) helps mitigate this risk.

3. **Installation Challenges**

Although the sensor itself is relatively simple to install, some users may encounter difficulties with wiring harnesses, connectors, or sensor placement. In rare cases, the vehicle s ECM may not recognize the aftermarket sensor, leading to diagnostic trouble codes (DTCs) like P245A or P245B. This can require additional troubleshooting or even a reprogramming of the ECM.

4. **Mixed Reviews on Longevity**

While many users report long-term reliability, some have experienced failures after only a few thousand miles. The lifespan of the sensor can depend on driving conditions, engine maintenance, and the quality of the unit. Regular DPF regeneration cycles and exposure to high temperatures or contaminants (e.g., diesel exhaust fluid or road salt) may accelerate wear.

5. **No Direct Support from Manufacturer**

Unlike OEM sensors, which are backed by the vehicle manufacturer, the Cerny 432AA relies on the manufacturer s warranty and customer service. While Cerny Sensors is generally responsive, resolving issues may require more effort than dealing with a dealership or OEM parts department.

6. **Potential for False Positives**

In some cases, replacing the PM sensor with an aftermarket unit may not fully resolve underlying DPF issues. If the DPF itself is clogged or damaged, the new sensor may still trigger regeneration cycles or error codes, requiring additional diagnostics or repairs.

---

### **Conclusion**

The Mopar Cerny 432AA Exhaust Particulate Matter Sensor is a viable and cost-effective alternative to OEM sensors for compatible Ford, Ram, and Jeep diesel vehicles. Its strengths lie in its compatibility, performance, and affordability, making it a popular choice for owners looking to avoid expensive OEM replacements. However, potential buyers should carefully verify compatibility, purchase from trusted sources, and be prepared for minor installation challenges or diagnostic issues.

For most users, the Cerny 432AA offers a reliable solution to PM sensor failures, provided they follow proper installation procedures and monitor the sensor s performance post-installation. If the vehicle s DPF system has deeper issues, the sensor replacement alone may not suffice, and further diagnostics are recommended.

---

### **Recommendation**

If you are experiencing symptoms such as DPF regeneration alerts, check engine lights related to the PM sensor (e.g., P245A, P245B), or reduced engine performance due to a faulty PM sensor, the Cerny 432AA is a strong candidate for replacement. **Before purchasing:**

1. **Confirm compatibility** with your exact engine and model year using the manufacturer s fitment guide or consulting a trusted mechanic.

2. **Purchase from a reputable retailer** to avoid counterfeit or low-quality units. Websites like RockAuto, Summit Racing, or the official Cerny Sensors store are good options.

3. **Prepare for installation** by gathering the necessary tools and verifying wiring harness compatibility. If unsure, consult a professional.

4. **Monitor the sensor post-installation** for any error codes or performance issues. If problems persist, further diagnostics may be needed.

For owners of compatible diesel vehicles, the Cerny 432AA is a practical and well-regarded aftermarket solution. However, if budget allows and the vehicle is still under warranty, exploring OEM replacement options through the dealership may be worth considering for added peace of mind.

Details:

Fitment information may not be available for all products and those without fitment will have a link at the top. From the Cuds and Challenger to Hem power plant, Mopar has become a true performance legacy. Made to fit, Built Last.

Please Match Part To Vehicle Before Purchasing!, About the manufacturer: When its time to repair your Chrysler, Dodge, Plymouth, Jeep, RAM, or Fiat theres only one choice for parts. FIND the make, model, year, and trim if applicable to ensure a match. Theres no substitute for quality!, For more than 75 years, Mopar Performance has been creating iconic and innovative automotive products. Please the link to ensure proper fitment.

However, we must be advised of any faulty or damaged goods immediately upon receipt the item. Grand Tex Part Number: CERNY432AA. Is this the correct part. Choose GENUINE OEM MOPAR PARTS.

NEW OEM Mopar Exhaust Particulate Matter Sensor CERNY432AA. Item Details. LOOK at the existing part you are replacing and compare to picture above. You get what you see.

Live the Mopar life with power, passion, and performance!, This product has been designed original part specifications will offer reliable, long lasting performance.

part #: cerny432aa prices

• $65.00-$424.99

specifications emissyste:

• for makes: Mopar
• mpn: Cerny432aa
• part type: Particulate Exhaust Sensor
• ipn: 4384375
• universal fitment: Direct Replacement

shipping emissyste:

• carrier: USPS, FedEx
• class: Standard, Expedited, One-day
• cost: $0.00
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery, FedEx Priority Overnight
• transit: 3-8 Days
• type: Calculated

offer emissyste:

• availability: In Stock
• quantity: 1
• sold: 0
• best offers: True
• options: Ship-to-home
• started: April 14, 2026

seller emissyste:

• # reviews: 135774
• city: Houston, Texas
• rating: 99.9%

payments emissyste:

• wallet: Google-pay
• credit card: Mastercard
• other

general emissyste:

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

returns emissyste:

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

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