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Caterpillar 3126 Engine Control Module (ECM)

CATERPILLAR 3126 ENGINE CONTROL MODULE (ECM)

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,895.00

CORE CHARGE:

$1,000.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER
PART TYPEEngine Control Module (ECM)
BRANDTamerx Diesel Products
ENGINE MAKECaterpillar
ENGINE TYPE3126
YEAR
PART NUMBER7AS70RM
APPLICATION NOTESESN# 7AS
ADDITIONAL NOTESComplete engine serial number required for factory programing

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Engine Control Module (ECM), Tamerx part number 7AS70RM. All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Caterpillar 3126, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: Complete engine serial number required for factory programing

OEM NUMBERS

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT6.00 LBS

SHIPPING OPTIONS

Ship Weight : 6.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


The Caterpillar 3126 Engine Control Module (ECM) is engineered to bring your engine back to peak performance with reliable fuel management and smooth operation. Manufactured to meet strict OEM specifications, this ECM delivers accurate control over fuel injection, throttle response, and emissions, helping your engine run efficiently and consistently. Designed for a perfect fit with Caterpillar 3126 engines, it resolves power loss and performance issues with ease. Don’t let a malfunctioning ECM slow you down—install this dependable replacement and keep your equipment operating at its full potential.

PEOPLE ALSO ASKS | BLOG(S)

The Engine Control Module (ECM) is the brain of your vehicle's engine, managing key functions such as fuel injection, ignition timing, and emissions control. When ECM issues arise, they can cause a variety of engine performance problems. Troubleshooting an ECM issue requires a systematic approach to identify the root cause and ensure proper engine function. Here are some key steps to troubleshoot ECM problems.

  • Check for Warning Lights

    • The first sign of an ECM issue is often the Check Engine Light illuminating on your dashboard. Use an OBD-II scanner to retrieve diagnostic trouble codes (DTCs) that can provide insight into potential problems with the ECM.

  • Inspect Electrical Connections

    • A loose or corroded electrical connection can cause ECM malfunctions. Inspect the wiring harnesses, connectors, and battery terminals for signs of wear, damage, or corrosion, and ensure everything is securely connected.

  • Test the Battery and Alternator

    • An ECM requires a stable voltage supply to function properly. Low voltage from a weak battery or faulty alternator can cause the ECM to malfunction. Test the battery and alternator to ensure they are operating within the correct voltage range.

  • Look for Sensor Failures

    • ECMs rely on various sensors (such as the oxygen sensor, MAF sensor, and crankshaft position sensor) to gather data. A malfunctioning sensor can send incorrect information to the ECM, leading to performance issues. Use diagnostic tools to check sensor functionality.

  • Reset or Reflash the ECM

    • Sometimes, ECM issues can be resolved by resetting the module. This can be done by disconnecting the battery for a few minutes or using a professional diagnostic tool to clear the codes. In some cases, the ECM may need to be reflashed with updated software.

  • Check for ECM Fault Codes

    • When using an OBD-II scanner, take note of any specific ECM-related fault codes. These codes can help you identify if the ECM itself is the problem or if it’s an external component causing the issue.

Troubleshooting ECM issues involves checking for warning lights, inspecting electrical connections, testing the battery and alternator, and evaluating sensor performance. If problems persist, resetting or reflashing the ECM may resolve the issue. Addressing ECM problems early ensures your engine continues to perform efficiently and helps avoid more costly repairs down the line. Regular diagnostics and prompt attention to any warning signs can help keep your ECM functioning properly.

Common symptoms include inconsistent idle, difficulty starting, and unresponsive throttle.

Electrical surges, water intrusion, or internal short circuits can cause immediate ECM failure.

  1. How long can a Caterpillar 3126 ECM typically last?

When properly maintained, the ECM can last between 10 to 15 years under normal use.

 

  1. Why is regular inspection of the Caterpillar 3126 ECM beneficial?

Routine checks help catch early signs of failure like connector wear or module overheating.

 

When properly maintained, the ECM can last between 10 to 15 years under normal use.

Routine checks help catch early signs of failure like connector wear or module overheating.

 

Caterpillar Engine Control Module (ECM)s