How it works

You ship it in

Self-ship, or add a prepaid UPS label ($45). Drop-offs in Princeton by appointment.

We test it ($350 bench fee)

Full diagnostic on the bench. Written report in 1-2 business days.

Repair or exchange

If fixable, the $350 credits toward repair. If not, we quote an exchange — usually same-day ship.

Back to you

Standard repair 3-5 days on bench plus 1-3 days return shipping. Rush 24-48hr (+$245).

Already bought a remanufactured unit from us? Start a warranty claim.

Identify ECM

View Pricing

Submit

IDENTIFY YOUR ECM

Enter a part number, serial number, or ECM name — or select your manufacturer below.

Examples: part number (4993120), engine serial (6NZ01234), or family name (CM2350, DDEC IV)

— or select your manufacturer —

Cummins

ISX / ISM / ISL / ISB / X15 / X12 / L9 / B6.7

Ram / Dodge Cummins

Ram 2500 / 3500 / 4500 / 5500

Detroit Diesel

Series 60 / DD13 / DD15 / DD16

Caterpillar

3406E / C15 / C13 / C12 / C10 / C7 / 3126

Paccar

MX-13 / MX-11

Volvo / Mack

D11 / D13 / D16 · MP7 / MP8 / MP10

Skip — I don't know my ECM info

REPAIR PRICING

Here's what we see for your ECM. The $350 bench fee is applied toward the total repair cost.

BENCH FEE (REQUIRED TO START)

$350

Applied as credit toward your repair — you only pay the difference

SUBMIT REPAIR REQUEST

Fill in your details and we'll get started as soon as your ECM arrives.

Contact Information

We reply by email within one business day. We don't take phone calls — it keeps your repair cheaper.

First Name *

Last Name *

Company (Optional)

Email *

Phone (optional)

Shipping address (optional — only needed once you're ready to ship; we confirm by email first)

Address

City

State

ZIP Code

How did you hear about us?

ECM Details

Pre-filled from your selection. Add serial numbers if you have them.

Manufacturer

ECM Type

ECM Part Number

ECM Serial Number

Engine Serial Number

VIN (Optional but Helpful)

Application

Year / Make / Model

Describe the Problem *

Photos (Optional but Helpful)

Upload photos of your ECM label, engine data plate, or any visible damage. This helps us prepare for your repair.

Click to upload or drag photos here

ECM label, engine plate, damage photos

Shipping Option

Local Drop-Off — Princeton, MN

Bring your ECM to our shop. We confirm the address and a drop-off time by email after you submit. By appointment.

FREE

Self-Ship

Ship your ECM to us using your own carrier

Email Label

We'll email you a prepaid UPS shipping label

+$45

White Glove

We send you a complete shipping kit with box, padding & label

+$95

Rush Service

Overnight shipping kit + priority repair queue

+$245

Rush Priority (Optional)

Rush Priority Queue

Move my job to the front of the bench queue regardless of shipping method. Same-day or next-business-day touch when physically possible.

+$195

I agree to the Terms of Service including the $350 non-refundable bench fee for diagnosis. I understand repair costs (if applicable) will be quoted after diagnosis.

Keep me updated — I agree to receive occasional updates about products, services, and promotions from Northland ECM. Unsubscribe anytime.

GOT A DIFFERENT MODULE?

Instrument clusters, transmission controllers, body or comfort modules — send pictures and a quick description and we will tell you if it is something we can take on.

Diesel ECM repair by make

We repair and remanufacture diesel ECMs from any state. Ship yours in, we test it on the bench, and you get a written report and an upfront price before any work starts. Below are the engines we work on most. Don't see yours? Use the identify tool above or send us a message.

Cummins ECM Repair

ISX, ISM, ISL, ISB, X15, X12, L9 and B6.7. CM870, CM871, CM2150, CM2250, CM2350 and Celect / Celect Plus. Repair or remanufactured exchange, tune preserved where possible.

Cummins ECM repair details →
Browse Cummins ECMs →

Caterpillar ECM Repair

3406E, C7, C10, C12, C13, C15, C16, 3126 and 3176. ADEM II, III and 4. We repair common no-start, communication and injector-driver faults, or exchange for a remanufactured unit.

Caterpillar ECM repair details →
Browse Caterpillar ECMs →

Detroit Diesel ECM Repair

Series 60, DD13, DD15 and DD16. DDEC III, IV, V and VI. Send your module in for bench diagnosis and repair, with a remanufactured exchange available if a unit is unrepairable.

Detroit DDEC ECM repair details →
Browse Detroit ECMs →

Mack & Volvo ECM Repair

Volvo D11, D13, D16 and Mack MP7, MP8, MP10. EMS and engine ECMs repaired or exchanged. Ship it in from any state and we will tell you what is going on before you commit.

Volvo & Mack ECM repair details →
Browse Volvo / Mack ECMs →

Paccar ECM Repair

MX-13 and MX-11 engine ECMs. Repair or remanufactured exchange, with cloning available to keep your existing calibration.

Paccar MX ECM repair details →
Browse Paccar ECMs →

Diesel ECM Exchange

If your ECM is unrepairable, we ship a tested, remanufactured exchange unit, usually same day, backed by a 2-year transferable warranty and a 90-day core window.

Browse all exchange ECMs →

DIESEL ECM REPAIR