2003 Honda Civic 1.7L Engine Control Module | 37820-PMP-L07

Engine Computer (ECM, ECU, PCM) for a 2003 Honda Civic - 37820-PMP-L07

The 2003 Honda Civic 37820-PMP-L07 Engine Control Module ECU ECM is a crucial component that governs the performance of your Honda Civic. As the brain of your vehicle's engine, this control module ensures optimal fuel efficiency, smooth operation, and emission compliance. Crafted with precision and reliability, it replaces the original part numbers 37820-PMP-L07 and more. Trust this genuine Honda module to keep your Civic running at its best.
Fits Part Number(s): 37820-PMP-L07
Replaced By:
Common symptoms of a malfunctioning engine control module include:

• Check engine light stays on after reset.
• Engine shutting off for no reason.
• The apparent loss of spark
• The apparent loss of injection pulse or fuel pump.
• Intermittent starting problems.
• Loss of communication between the ECU and the scanning tool.
• Wait to start light stays on.
• Poor fuel efficiency.

Get your Civic back on the road quickly by purchasing a replacement OEM 37820-PMP-L07 Powertrain Control Module PCM/ECM from Auto Computer Performance.
We stock a large inventory of control modules for most makes and models from 1989 to 2021. We have over 17 years of experience repairing and selling engine control modules. Your PCM will arrive pre-programmed to your specific vehicle and is simple to install.
We offer PCM Repair Services!
For over 17 years we have been repairing and programming Engine Control Modules. Our repair facility is equipped with state-of-the-art diagnostic and OEM programming tools. Our friendly and knowledgeable technicians will quickly diagnose and repair any issues with your PCM.
All of our control modules undergo strict quality testing and are guaranteed to meet OEM specifications and pre-programmed to match your VIN for a true Plug-and-Drive installation.
NOTE: We will need your VIN number during the checkout process in order to program the unit.

Q1. Will this ECM fit my 2003 Honda Civic 1.7L?

1. Yes. This is a genuine OEM engine control module (ECM/ECU/PCM), part number 37820-PMP-L07, for the 2003 Honda Civic with the 1.7L engine. To be sure, check that the number printed on your current ECM matches 37820-PMP-L07, or send us your VIN and we will confirm the exact fit before you order.

Q2. Is the Honda Civic ECM plug-and-play, or do I have to program it?

1. It ships programmed to your VIN, so it installs plug-and-play — you unplug the old unit and plug the new one into the same location. After installation, some vehicles need the keys re-registered to the new ECM and a short idle relearn — see the immobilizer question below.

Q3. Why do you need my VIN to program the Honda Civic ECM?

1. Your 17-digit VIN lets us load the correct factory calibration for your exact Honda Civic before the unit ships. You provide it at checkout; if it is missing we contact you before shipping. Your VIN is on the driver's door-jamb sticker, at the base of the windshield on the driver's side, or on your vehicle registration and insurance card.

Q4. Will I need to re-register my keys or immobilizer after installing the ECM?

1. Possibly. On most Honda vehicles the keys must be re-registered to the new ECM through the Honda immobilizer system after installation, and the vehicle may need a short idle relearn. A Honda dealer, an automotive locksmith, or a Honda-capable scan tool can do this in minutes. Contact our support team and we will tell you what your vehicle needs.

Q5. Is this a genuine OEM part or an aftermarket copy?

1. It is a genuine OEM 37820-PMP-L07 module that we remanufacture and test in-house — not an aftermarket clone. We restore the original factory unit and bench-test it with ASE-certified technicians before shipping, so it fits and functions like the factory part.

Q6. What are the symptoms of a bad Honda Civic ECM?

1. Common symptoms include a no-start or hard-start condition, stalling, a check engine light with multiple or communication-related codes, rough running, poor fuel economy, and no communication with a scan tool. Have the codes read first to confirm the ECM is the cause before ordering; our team can help you interpret them.

Q7. Will replacing the ECM fix my check engine light or no-start?

1. If your diagnosis points to a failed ECM, installing this correctly programmed replacement should clear the module-related codes and resolve the no-start or warning light. If the underlying cause is a sensor, wiring, or mechanical fault, that problem must be repaired as well.

Q8. How long does it take to install the Honda Civic ECM?

1. The physical swap usually takes about 15 to 40 minutes because the ECM ships pre-programmed. Allow a little extra time if your vehicle needs a key/immobilizer relearn or idle relearn afterward.

Q9. Do I need to send in my original ECM (core)?

1. Some orders require your original unit as a returnable core or for data transfer, while others do not. If a core is needed, you simply send in your old unit after you receive the replacement, and our team will confirm exactly what your part requires when you order.

Q10. What warranty comes with this ECM?

1. It includes a 6-month warranty plus lifetime phone support. The warranty is full for the first 3 weeks and prorated after that. If a covered unit fails, contact us and we will make it right under the warranty terms.

Q11. Is the ECM tested before shipping?

1. Yes. Every unit is bench-tested by ASE-certified technicians before it ships. We repair and test modules in-house, so the part you receive has been verified to function before it leaves us.

Q12. How much does the Honda Civic ECM cost and what is included?

1. The current price is shown at the top of this product page. The ECM ships programmed to your vehicle, bench-tested, and ready to install plug-and-play (some vehicles need a key relearn afterward), and includes a 6-month warranty with lifetime phone support.

Q13. How fast will the ECM ship?

1. Orders are programmed and shipped quickly. Once we have your VIN, your unit is programmed and shipped quickly, and you receive tracking as soon as it leaves us. Contact us if you need expedited delivery.

Q14. What is your return policy on this ECM?

1. We stand behind every unit. If you need to return a module, contact us first for a return authorization and instructions and we will guide you through the process. Please see our return policy for full details.

Q15. What if I get stuck during installation or the relearn?

1. Lifetime phone support is included with every unit. Our ASE-certified team can walk you through installation, any required relearns, and troubleshooting for as long as you own the part.