Oxygen Sensor, Left Side, After Catalyst - Mopar (56029049AA)
56029049aa
Fix Your Check Engine Light – Genuine Mopar Quality
Restore your engine's efficiency and pass your emissions test with this authentic Mopar Oxygen Sensor. Engineered as a direct OEM factory replacement part, this downstream O2 sensor monitors your exhaust system on the left side, after catalyst position to ensure your catalytic converter is operating at peak performance.
Why choose this genuine automotive exhaust sensor over cheap generic alternatives?
- Clear Trouble Codes: Precisely calibrated to detect exact oxygen levels, permanently turning off check engine lights (CEL) triggered by sluggish response times or catalytic converter efficiency codes (such as P0420 or P0430).
- Pre-Coated Anti-Seize Threads: Features factory-applied anti-seize compound right out of the box, ensuring a smooth installation into the exhaust pipe and preventing future thread galling.
- Exact Plug-and-Play Harness: Includes the correct factory wiring harness length and original equipment connector, preventing the voltage drops, loose connections, and splicing hassles common with universal sensors.
Do not risk poor fuel economy, rough idling, or failed vehicle inspections with uncalibrated aftermarket sensors. Invest in original equipment precision to keep your powertrain control module reading accurately.
[naa,na1]. After catalyst lt hand downstream. Before catalyst lt hand. Before catalyst rt hand. Left Downstream. Left Upstream. Right Downstream. Right Upstream. Up Stream.
- Min. 12 Months
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Product Details
Description
Fix Your Check Engine Light – Genuine Mopar Quality
Restore your engine's efficiency and pass your emissions test with this authentic Mopar Oxygen Sensor. Engineered as a direct OEM factory replacement part, this downstream O2 sensor monitors your exhaust system on the left side, after catalyst position to ensure your catalytic converter is operating at peak performance.
Why choose this genuine automotive exhaust sensor over cheap generic alternatives?
- Clear Trouble Codes: Precisely calibrated to detect exact oxygen levels, permanently turning off check engine lights (CEL) triggered by sluggish response times or catalytic converter efficiency codes (such as P0420 or P0430).
- Pre-Coated Anti-Seize Threads: Features factory-applied anti-seize compound right out of the box, ensuring a smooth installation into the exhaust pipe and preventing future thread galling.
- Exact Plug-and-Play Harness: Includes the correct factory wiring harness length and original equipment connector, preventing the voltage drops, loose connections, and splicing hassles common with universal sensors.
Do not risk poor fuel economy, rough idling, or failed vehicle inspections with uncalibrated aftermarket sensors. Invest in original equipment precision to keep your powertrain control module reading accurately.
[naa,na1]. After catalyst lt hand downstream. Before catalyst lt hand. Before catalyst rt hand. Left Downstream. Left Upstream. Right Downstream. Right Upstream. Up Stream.

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Shipping Policy
- In stock orders ship within 24 hours. The web site does not reflect inventory on hand t the store, but rather inventory across all of Chrysler's depots.
- Part diagrams may not accurately reflect actual vehicle.
- When a vin number is entered the catalog lists all possible parts that could fit your vehicle. Not parts that only fit your vehicle. The vin filter takes out parts that fit other vehicles. Example: if you have a truck and a vin# is entered the catalog won't display minivan parts.
- If same day shipping is selected and parts are not in stock, we will ship same day once part is received
- Weekend orders will be processed the next business day.
- If a part is not in stock and must be ordered from the manufacturer, it usually takes 2-3 days to arrive to us and will be promptly shipped to you. Most of the orders are shipped complete within 2-3 business days. A few of the parts ordered from the manufacturer may take up to 5-6 business days to arrive and will shipped to you immediately. Backordered items will ship as soon as the order becomes available.
- Parts that have been discontinued by Chrysler and are routed to the new old stock warehouse take an extra day to process
- Depending upon location, ground shipments usually take 3-7 days.
- Your order may be shipped Overnight/expedited for an additional cost. Orders will be shipped overnight/expedited after the store receives the parts.
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- Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost to the customer.
- We do not ship internationally.
- In the unlikely event that a part has been placed on backorder or discontinued, we will do our best to try and find one for you as quickly as possible.
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- We are not responsible for delivery date changes due to the carrier.
- If a vin# is entered the catalog filters out parts for other vehicles (ex if a truck vin is entered, minivan parts are filtered out) catalog will list all possible parts that could fit. Please call us if there is a question on the correct part.
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Return Policy
- Contact us to arrange for any returns.
- Buyer is responsible for return shipping on new returns and core returns
- A copy of the invoice will need to be included with the return.
- There is a 15% restocking fee charged against all returned parts.
- Parts must be resaleable and in the original packaging.
- We cannot take back used parts.
- We cannot take back installed or tried parts.
- Electrical parts are not returnable.
- We do reserve the right to refuse and return any parts we find have been installed, are used or do not meet the above criteria.
- We strongly encourage you to provide your Vehicle Identification Number (VIN) when ordering to ensure perfect fitment; returns for orders placed without a verified VIN will incur a 15% restocking fee. Providing your VIN is the best way to guarantee the parts you order are exactly what your specific vehicle needs, saving you time and money on returns.
- Return request need to be within 30 days of receipt.
Cancellation Policy
- An order or a portion of an order may be cancelled up until the time it is shipped and no longer in our possession.
- If the cancelled part was special ordered from the manufacturer a return fee of 15% will apply.

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