A56-U84 E44
A56-U84 E44
How our process works (Service)

A56-U84 E44 Nissan Maxima 00-03 ECU Engine Computer Repair Service

Original price was: $199.95.Current price is: $149.95.

Nissan Maxima having ECU issues? Check out our repair service!

A56-U84 E44

Compatible with years 2000-2003

SKU 00-03-Maxima-ECU-Repair|A56-U84 E44 Categories , ,


Compatible with 2000, 2001, 2002 and 2003 years.

May also be compatible with Infiniti I30, I35, QX4, and Pathfinder.

Nissan Maxima having idling issues?

Thinking the A56-U84 E44 ECU might be the culprit? 

We can help! 

Common symptoms of a faulty ECU include: 

  • Rough idle
  • High or erratic idle
  • Hard to start or not starting
  • P0505 code

Simply send us your ECU and let us rebuild it for you. (See how below)

Our repair service is a cheaper alternative to a replacement, saving you money and allowing you to keep your original parts and programming.


A hassle free 2-year warranty and 24 -48-hour turnaround time is included with every repair.

The entire process from start to finish typically takes 5 to 7 business days including transit times. (From your door to ours, back to yours.)

Our service only includes return shipping (you must pay to ship the unit to us, we do not include a shipping label)

To send your unit in for service please follow these steps;

  1. Remove your ECU from the vehicle.
  2. Purchase the service by clicking the Buy Now button Above. (Pre-paying for the service will speed up handling times)
  3. Include the same name used to place the order on or inside the package. That name is your receipt.
  4. Using any shipping service, ship the unit to the address we provide on the bottom of the website or on our contact us page.

✓ That’s it, you’re done!

Once we receive the unit it will be repaired and returned via USPS Priority mail within 24-48 hours.

A tracking will be emailed to your inbox as soon as the repair has been completed.

Re-install and you’re ready to go, no programming or calibration needed.

Technician’s notes:

A failing IAV valve is common in these Nissans and when defective it can short out the ECU causing idle issues.

YOU MUST REPLACE THIS VALVE AFTER OUR REPAIR – Failure to do so will result in the same ECU issues.

If for any reason you are sending this unit and do not have the P0505 code present let us know before purchasing a repair.

Other acronyms for the Engine Computer: ECU Engine Control Unit – ECM Engine Control Module – BCM Body Control Module – PCM Power Control Module

(if you don’t see your part number it’s okay as long as it’s between the years 2000-2003)

We understand for some, a vehicle is a part of the family. Our mission is to get your vehicle back on the road by offering quick and cost-effective solutions.

Don’t hesitate to reach out if you have any other questions, we are always here to help!

-Module Mechanics

Additional information


2000, 2001, 2002, 2003





Part Numbers

A56-U84 E44

This service includes a 2 year warranty which starts on the day of delivery.

In the unlikely event our service fails we may ask for the unit back to perform repairs, replace the unit or refund the service cost at our discretion.

  • 2 year warranty included with purchase, optional 5 year available.
  • Warranty will begin on the day tracking confirms delivery.
  • We do not reimburse for shipping and/or labor costs.
  • Return shipping labels are not currently provided.
  • Some units may not be repairable due to age, wear, symptoms or previous repair attempts.
  • For simplicity and fairness, we will not impose a diagnosis fee for unrepairable units.
  • Warranty work may not be available for some units & a refund will be offered instead.
  • Buyer assumes all responsibility confirming part function after installation & during road use.
  Having an issue? We’re here to help! Email us:


Our mission is providing unique and cost saving solutions to combat the automotive industries problematic electronic issues, keeping you in your car, not your wallet. 

You're viewing: A56-U84 E44 Nissan Maxima 00-03 ECU Engine Computer Repair Service Original price was: $199.95.Current price is: $149.95.
Rated 0 out of 5
Select options
Select the fields to be shown. Others will be hidden. Drag and drop to rearrange the order.
  • Image
  • SKU
  • Rating
  • Price
  • Stock
  • Availability
  • Add to cart
  • Description
  • Content
  • Weight
  • Dimensions
  • Additional information
Click outside to hide the comparison bar

Our Shipping Address

Module Mechanics

6732 W. Coal Mine Ave, STE 511, Littleton, CO 80123

*Please include your name or order number with the shipment

Everything You Need!
If you have any question, please contact us at
Shopping cart close