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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Honda

Engine Control Module (ECM)

Name: Engine Control Module (ECM)
Brand: Honda
SKU: 37820-PLM-A73

$750.29

SKU: 37820-PLM-A73

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Overview

The Honda 37820-PLM-A73 is a refurbished Engine Control Module (ECM) designed for the 2004-2005 Honda Civic with a 1.7L automatic transmission and Federal emissions. This genuine Honda part is a direct replacement that may require dealer programming.

It comes with a 1-year limited warranty. Note that a $100 refundable core deposit is included in the price.

Show original supplier description

The Honda 37820-PLM-A73 is a refurbished Engine Control Module (ECM), also known as an Engine Control Unit (ECU) or Power Control Module (PCM), specifically designed as a direct replacement for the 2004 and 2005 Honda Civic models equipped with the 1.7L engine and automatic transmission. This unit is compatible with Federal emissions standards. While this is a genuine Honda part, it is noted that it "Likely needs to be Programmed by a Dealer." Some vendors offer a programming service where your original ECU's data is transferred to the replacement, potentially avoiding dealer fees and allowing for a plug-and-play installation with your existing keys and VIN. The entire process for such services typically takes 5 to 7 business days. This ECM is covered by a 1-year limited warranty from the manufacturer. Additionally, some sellers include a $100 refundable core deposit in the price, and may offer a reduced restocking fee for returns if the part was used for diagnostic purposes but not found to be the cause of the issue. Common symptoms of a failing ECU include rough idle, cylinder misfires, poor acceleration, failure to be found via OBD, non-functioning A/C, difficulty starting, fault codes that won't clear, and transmission shifting problems. It is important to ensure this part number matches your original for compatibility.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

Brand	Honda
Part Number	37820-PLM-A73
Category	Ignitions and Electrical

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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