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Mack E7 ECM 12MS523M Control Modules

Mack E7 ECM 12MS523M

External: sold by Dieselacs on its own website Dieselacs Automobile Computer Solutions dieselacs.com

External product

This product is sold and fulfilled by Dieselacs on its own online store, dieselacs.com (opens in a new tab). Payment, shipping, returns and warranty are handled by the store, not by kayparts. Details come from the store's public catalog (last checked 2 days ago) and may have changed.

Product Overview

  • Sold by: Dieselacs
  • Store: dieselacs.com
  • Brand: Automobile Computer Solutions
  • Category: Control Modules
  • Availability: In stock

Price history

The price has stayed at $1,695.00 USD since we started tracking it on Nov 10, 2026. Prices come from dieselacs.com's public catalog, checked on every sync.

Description

Mack E7 Diesel ECM 12MS523M | Engine Control Module 🚚 We Ship Worldwide πŸ›‘οΈ 2-Year Warranty βœ… Professionally Inspected & Tested πŸ”§ Additional Programming Required PRODUCT DESCRIPTION The Mack E7 ECM 12MS523M is an OEM Engine Control Module (ECM / ECU) designed for compatible Mack E7 diesel engine applications. This replacement ECM is designed to restore proper electronic engine management and control when replacing a defective or malfunctioning original module. Each unit is professionally inspected and tested before shipping to help ensure dependable performance and reliable operation. IMPORTANT: ADDITIONAL PROGRAMMING REQUIRED This ECM is NOT Plug & Play. Additional programming or configuration may be required before the ECM will operate correctly in your vehicle. ACS does not offer programming services for this ECM. All necessary programming must be performed by the customer or a qualified diesel technician. PRODUCT SPECIFICATIONS Manufacturer: Mack Engine: Mack E7 Diesel OEM Part Number: 12MS523M Component: Engine Control Module (ECM / ECU) Condition: OEM Replacement Core Charge: $150 Warranty: 2 Years Programming: Not Included or Offered Shipping: Worldwide CORE CHARGE β€” $150 A $150 refundable core charge applies to this ECM. The core charge is refundable once your eligible original ECM is returned and accepted in accordance with our core return policy. 2-YEAR LIMITED WARRANTY This ECM includes a 2-year limited warranty covering qualifying defects under normal operating conditions. Warranty does not cover damage resulting from: Improper installation or incorrect wiring Electrical shorts or voltage surges Water damage or physical damage Incorrect programming or external vehicle electrical problems IMPORTANT FITMENT INFORMATION Please verify your original ECM part number before purchasing. OEM Part Number: 12MS523M Compatibility must be confirmed using the original ECM part number and engine specifications. Professional installation and programming are…

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