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AEM ECU Conversion Harness

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AEM ECU Conversion Harness, Direct fit

$149.82 $194.30 You Save $44.48 (23%)
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AEM UNIVERSAL ECU PATCH/EXTENSION HARNESS -- Constructed with original ECU and harness connectors for exact fitment; Allows for easy access to all ECU signals/wires and easy removal of any device tha...(see more)
  • Brand SKU#: AEM 30-2982B
  • Product Fit: Direct fit
  • Quantity Sold: Sold Individually
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 1-year AEM limited warranty

Select more AEM parts under Switches, Relays, Wiring & Components from list below.

AEM ECU Conversion Harness Review

Date Published:
  • Performance 4.5
  • Ease to Use/Intallation 4.5
  • Quality 5
  • Price 3.5
Overall Rating 4.4

AEM is highly regarded in the auto industry for its performance electronics, and one of the key electronic products it offers is the ECU conversion harness. Meant to replace the wires connected to and from the vehicle ECU, the AEM conversion harness offers a better alternative for both average car owners and hardcore street tuners alike. In this review, we tested several models of AEM's ECU harnesses to determine whether they are worth the price or are just sending the wrong signals.


  • Universal wiring harness for ECU of select car models
  • 80-pin connector with cover, 80 small pins, 1 micro relay with pins and 30 sealing plugs
  • Includes pre-wired power, grounds, power relay, fuse box, single wideband and AEMnet
  • Sealed with 30 sealing plugs
  • Premium-quality wires wrapped by color-coded, insulated shielding with silk-screened functions on each wire
  • Limited one-year AEM warranty

The upside

  • Includes everything you need in an ECU wiring harness. This is probably the biggest selling point of ECU's conversion harness; from the fuse box to the relay, all you need is in the unit. You can basically plug it in to the ECU and it's good to go.
  • Each wire is color coded, making it easy to identify which wire goes where. It certainly cuts down on instances of incorrect wiring. In addition, the color-coded wires also make it easier for tuners to modify the wires according to their needs.
  • The wires are made of high-quality materials and are protected with weatherproof seals. It certainly looks like they will be able to withstand years of heavy use.
  • Includes a limited warranty. AEM is well-known for its comprehensive warranty program, and we're glad that its ECU wiring harness is covered by it as well.

The downside

  • The wires are a bit short. Some models may require one or more extenders in order to work.
  • A bit expensive. AEM wiring harnesses can fetch a price of up to $250 on the market. However, this is not surprising given its features and the quality of its craftsmanship.

The bottom line

While certainly pricey, the AEM ECU conversion harness certainly makes up for it in terms of features, functionality, and overall good quality. It certainly has everything you would want in an ECU wiring harness. Installation can also be a breeze, although we do not recommend doing it on your own if you have no prior experience in handling automotive electronics.

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