Chrysler 300 (2011-2018) Ignition Knock Sensor: A Complete Guide
Understanding when and why to replace the knock sensor on your 2011-2018 Chrysler 300.
- Due to the difficult location under the intake manifold, labor is the most expensive part of the job.
- It is highly recommended to replace both sensors and the wiring harness at the same time.
- Choosing a premium aftermarket brand like NGK, Delphi, or Standard Ignition is a wise investment to avoid repeat repairs.
- A knock sensor code (like P0325 or P0330) can also be caused by other engine issues, so proper diagnosis is key.
Symptoms of a Failing Knock Sensor in a Chrysler 300
When a knock sensor goes bad, your Chrysler 300's computer can no longer tell if the engine is knocking. To be safe, it may default to a less efficient, protective mode. The most common sign is the Check Engine Light on your dashboard. You might also notice a decrease in power and acceleration, worse gas mileage, and in some cases, an audible metallic pinging or knocking sound from the engine, especially when accelerating.
Is it a Bad Sensor or a Bad Engine?
A knock sensor code doesn't always mean the sensor itself is broken. It can be triggered by other engine problems that are causing a real knock, like using low-octane fuel, carbon buildup, or cooling system issues. It's important to diagnose the problem correctly before replacing parts.
Choosing the Right Aftermarket Knock Sensor
For the 2011-2018 Chrysler 300, the knock sensors are located under the intake manifold, making replacement a labor-intensive job. Because of the high labor cost, choosing a reliable, quality part is essential to avoid doing the job twice. While Mopar is the original equipment manufacturer, several aftermarket brands offer a good balance of quality and price.
Aftermarket Brand Tiers
- Premium Aftermarket (Recommended): Brands like NGK (NTK), Delphi, and Standard Ignition (SMP) are known for making high-quality sensors that often meet or exceed OEM standards. They are considered very reliable choices and are often the go-to for professional mechanics when an OEM part isn't used.
- Standard Aftermarket: Brands like Beck Arnley, Walker Products, and Holstein offer a good middle ground. They are generally dependable, but quality can sometimes be inconsistent compared to premium brands.
- Economy Aftermarket: Brands like Dorman, Crown Automotive, and Global Parts are often the most affordable. However, reviews for electronic parts from these brands can be mixed, with some users reporting premature failures. Given the difficulty of this specific repair, using an economy brand might be a gamble that could lead to higher costs in the long run if the part fails.
Pro Tip: Replace the Harness
The wiring harness for the knock sensors lives in a high-heat environment under the intake manifold and can become brittle. It is highly recommended to replace the harness at the same time as the sensors. Some kits, like those from Dorman, include the harness.
Typical Costs for Chrysler 300 Knock Sensor Replacement
Costs can vary based on your location and whether you have a V6 or V8 engine. The biggest factor is the high labor charge due to the sensor's location.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Mopar) Sensor | $60 - $120 per sensor |
| New Aftermarket Sensor | $18 - $175 per sensor |
| Shop Labor | $220 - $322+ |
| Total Professional Job | $281 - $450+ |
Frequently Asked Questions (FAQ)
How many knock sensors does my 2011-2018 Chrysler 300 have?
V6 and V8 engines in the Chrysler 300 typically have two knock sensors. They are often referred to as Bank 1 and Bank 2 sensors. It is recommended to replace both at the same time, along with the harness.
Can I replace the knock sensor myself?
This is an advanced DIY job. For both the 3.6L V6 and the V8 engines, the intake manifold must be removed to access the sensors. This involves disconnecting fuel lines, various electrical connectors, and requires careful reassembly and specific torque sequences. If you are not an experienced DIY mechanic, it is best to leave this job to a professional.
What are the common error codes for a bad knock sensor?
The most common diagnostic trouble codes (DTCs) are P0325 (Knock Sensor 1 Circuit Malfunction Bank 1) and P0330 (Knock Sensor 2 Circuit Malfunction Bank 2). These codes point to a problem in the sensor's electrical circuit.
Are there any recalls for the knock sensor on the Chrysler 300?
A search of the National Highway Traffic Safety Administration (NHTSA) database shows no specific recalls for the ignition knock sensor on the 2011-2018 Chrysler 300. Recalls for this model year range primarily concerned other issues like the TPMS sensors.
Technical Specifications
OEM Part Numbers: 5149199AA 04892224AA
Number of Sensors: 2 (Typically one for each cylinder bank). Location: Under the lower intake manifold, in the engine valley. Connector: Typically a 2-pin rectangular connector.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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- Symptoms of a Failing Knock Sensor in a Chrysler 300
- Is it a Bad Sensor or a Bad Engine?
- Choosing the Right Aftermarket Knock Sensor
- Aftermarket Brand Tiers
- Pro Tip: Replace the Harness
- Typical Costs for Chrysler 300 Knock Sensor Replacement
- Frequently Asked Questions (FAQ)
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