2023-2024 Acura Integra 1.5T ECM: Programming, Immobilizer, and Replacement Facts
This is the definitive guide to the Engine Control Module (ECM) for the 2023-2024 Acura Integra with the 1.5L engine, covering the critical programming and anti-theft requirements you must know before replacement.
- The ECM is NOT plug-and-play; it requires mandatory programming to the vehicle's immobilizer system to function.
- A replacement ECM will cause a no-start condition until it is programmed by an Acura dealer or a properly equipped independent shop.
- Always match the OEM part number exactly: 37820-6LM-A52 for the 1.5L engine with an automatic transmission.
- As of early 2026, there are no specific recalls for the ECM on this vehicle, but several recalls exist for other components.
Symptoms of a Failing Engine Control Module
Because the 2023-2024 Acura Integra is a relatively new vehicle, widespread, model-specific ECM failures have not been commonly reported. However, like any complex electronic component, it can fail. Diagnosis can be tricky, as symptoms of a bad ECM often mimic other problems, like a faulty sensor or wiring issue. If you experience any of the following, the ECM could be a potential cause:
- Check Engine Light: The most common symptom is an illuminated Malfunction Indicator Lamp (MIL), or Check Engine Light. Codes related to ECM communication, like U0100 (Lost Communication with ECM), P0600 (Serial Communication Link Malfunction), or other U-codes, are strong indicators of an ECM or network problem.
- Engine Performance Issues: A faulty ECM can cause a wide range of drivability problems. These include engine misfires, rough idling, stalling, reduced power, and poor acceleration.
- No-Start Condition: The vehicle may crank but refuse to start. This can happen if the ECM is not properly managing the fuel and ignition systems or if there is an issue with the immobilizer system recognizing the key.
- Poor Fuel Economy: A sudden and unexplained drop in gas mileage can be a sign that the ECM is no longer calculating the correct air-fuel mixture.
- Transmission Shifting Problems: The ECM communicates with the Transmission Control Module (TCM). A bad ECM can send incorrect data, leading to harsh, erratic, or delayed shifting in automatic transmission models.
Known Issues, Recalls, and TSBs
As of early 2026, there are no specific recalls or Technical Service Bulletins (TSBs) issued by Acura or the NHTSA that directly address the Engine Control Module for the 2023-2024 Acura Integra.
Several recalls have been issued for this vehicle, but they pertain to other components:
- A recall for a potentially loose driver's seat cushion frame.
- A recall for an incorrectly manufactured steering gearbox.
- A recall concerning the Vehicle Stability Assist (VSA) modulator, which could leak brake fluid.
It is always a good practice to check the NHTSA website for the most current recall information regarding your specific vehicle's VIN.
Warning: This module MUST be programmed to your vehicle to function. This is not a plug-and-play part. Failure to program the module will result in a no-start condition.
Programming and Immobilizer Requirements
Replacing the ECM in a 2023-2024 Acura Integra is not a simple physical swap. The new or used module must be electronically paired to your specific vehicle. This process involves the immobilizer system, an anti-theft feature that prevents the engine from starting without a recognized key.
The ECM, immobilizer control unit, and your key all contain unique codes that must match. When you install a different ECM, this handshake fails, and the immobilizer will prevent the engine from starting. You will likely see a flashing green key symbol on the dashboard.
This programming procedure requires specialized equipment, specifically the Honda Diagnostic System (HDS) software or a compatible high-end professional scan tool. The process involves registering the new ECM to the vehicle's immobilizer system. While this is a standard procedure for Acura dealerships, many independent repair shops that specialize in Honda/Acura vehicles and some automotive locksmiths also have the necessary tools and subscriptions to perform this service.
Buying a Used Engine Control Module
Purchasing a used ECM can offer significant savings over a new unit. Because these modules are generally reliable, a used OEM part from a reputable supplier is a smart choice. Here’s what to look for:
- Match the Part Number: The most critical step is to match the OEM part number exactly. The primary part number for the 1.5L engine with an automatic transmission is 37820-6LM-A52. Using an ECM with a different part number, such as one from a manual transmission or a 2.0L Type S model (e.g., 37820-6PV-A03), will not work.
- Inspect for Damage: Visually inspect the module for any signs of physical damage, such as cracked casing, bent pins on the connectors, or signs of water intrusion or corrosion. Do not purchase a module that appears damaged.
- Source Vehicle: If possible, choose a part from a vehicle with no reported flood or fire damage. While the module's internal programming will be overwritten, severe environmental exposure can cause hidden damage.
- Vendor Reputation: Buy from a seller with a good reputation and a clear warranty or return policy. This protects you in case the part is Dead on Arrival (DOA).
Pro Tip: The VIN and mileage stored in the used ECM do not matter, as this information will be updated during the reprogramming process when the module is synced to your vehicle's Body Control Module (BCM) and immobilizer.
Cost Comparison
The cost of replacing an ECM can vary significantly based on the source of the part and labor rates. Programming is a required additional cost.
| Item | Estimated Cost |
|---|---|
| New OEM ECM (Part Only) | $300 - $450 |
| Used OEM ECM (Part Only) | $75 - $200 |
| Remanufactured / Aftermarket | Not commonly available for this model year yet. |
| Shop Labor (Physical Swap) | $75 - $150 |
| Programming (Dealer or Independent) | $100 - $300 |
| Total Estimated Cost (Used Part) | $250 - $650 |
| Total Estimated Cost (New Part) | $475 - $900 |
Frequently Asked Questions (FAQ)
Can I install an ECM myself and drive to the dealer for programming?
No. Once you install the replacement ECM, the vehicle's immobilizer will activate, and the engine will not start. The vehicle will need to be towed to the dealership or shop for programming.
Can a locksmith program this ECM?
Some well-equipped automotive locksmiths who specialize in modern vehicle key and immobilizer systems may have the tools and software subscriptions to program a new ECM to your Acura. You must confirm this with them beforehand.
Will disconnecting the battery reset a faulty ECM?
Disconnecting the battery may clear temporary fault codes, but it will not fix an internally failed ECM 🎬 Watch: How to reset or reprogram your Acura computer or resolve the need for programming a replacement unit. If the ECM has a hardware failure, the problem will persist.
Is the ECM the same for all 2023-2024 Integras?
No. The ECM is specific to the engine and transmission combination. The part number for the 1.5L with an automatic transmission is 37820-6LM-A52. The 2.0L Type S uses a different part number and the modules are not interchangeable.
Helpful Videos
Technical Specifications
OEM Part Numbers: 37820-6LM-A52 378206LMA52
For vehicles with 1.5L L4 Gas engine and Automatic Transmission.
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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.
- Acura Integra: