How To Identify Your DSM ECU

Whether you are modifying a DSM or simply want to repair your fried ECU, there’s a lot of reasons to know how to identify your DSM ECU. Unfortunately because these cars are no longer built, this information can be difficult to source, especially for those looking for 1G replacement capacitors.

Below is our comprehensive guide to DSM ECU part numbers, and these are all the same no matter what brand of DSM you own, Mitsubishi, Eagle or Plymouth. When you know how to identify your DSM ECU, you can find the replacement parts or the correct ZIF socket for modifying your ECU.

Knowing how to identify your DSM ECU is especially handy when you need to replace or repair your DSM capacitors. The capacitors in your DSM ECU are used to filter the power from the alternator to your ECU, and keeping your ECU happy. Your DSM ECU capacitors are there to even out the power signal and remove any of the unwanted spikes or dips in the current.

Unfortunately, given the age of these ECU’s and over time the many heat cycles can lead to your DSM capacitors leaking.

This can cause a whole host of problems in your DSM, from misdiagnosed problems or cam angle sensor issues. Because the capacitor is filled with electrolytes, damage can occur to your circuit board and / or other components of your ECU.

Signs your DSM ECU has leaking capacitors

1. An odd egg smell coming from behind your center console in your DSM (where your ECU is mounted)
2. Clicking or buzzing from under the dash
3. ECU tapping sounds from cover

When you see or hear any of these tell tale signs, it’s a good idea to check out our how to identify your DSM ECU DIY guide for the part numbers and information you need.

1G DSM – Turbo AWD Models – Eclipse, Talon, Laser

All Federal ECU Part numbers and build dates for 1G AWD Manual Transmissions;

• 3/89-6/90 – MD145903
• 6/90-6/92 – MD166262
• 7/92-5/93 – MD193299
• 6/93-5/94 – MD304484

All Federal ECU Part numbers and build dates for 1G AWD Automatic Transmissions;

• 6/90-6/92 – MD165531
• 7/92-5/93 – MD193300
• 6/93-5/94 – MD304485

All California ECU Part numbers and build dates for 1G AWD Manual Transmissions;

• 3/89-6/90 – MD145902
• 6/90-6/92 – MD166263
• 7/92-5/94 – MD193295

All California ECU Part numbers and build dates for 1G AWD Automatic Transmissions;

• 6/90-6/92 – MD165532
• 7/92-5/94 – MD193296

All Federal ECU Part numbers and build dates for 1G FWD Manual Transmissions;

• MD128625
• 6/90-6/92 – MD166260
• 7/92-5/93 – MD193297
• 6/93-5/94 – MD304482

All Federal ECU Part numbers and build dates for 1G FWD Automatic Transmissions;

• 6/90-6/92 – MD165529
• 7/92-5/93 – MD193398
• 6/93-5/94 – MD304483
• MD193298

All California ECU Part numbers and build dates for 1G FWD Manual Transmissions;

• MD128623
• 6/90-6/92 – MD166261
• 7/92-5/94 – MD193293

All California ECU Part numbers and build dates for 1G FWD Automatic Transmissions;

• 6/90-6/92 – MD165530
• 7/92-5/94 – MD193294

1991-1992 – Galant GVR-4 Federal ECU – MD165810

1991-1992 – Galant GVR-4 California ECU – MD165811

Galant GSX AWD Federal Manual Transmission –

• 6/89-5/90 – MD153303
• 6/90-5/91 – MD166250
• 6/91-5/92 – MD172577

Galant GSX AWD California Manual Transmission –

• 6/89-5/90 – MD153304
• 6/90-5/91 – MD166251
• 6/91-5/92 – MD172578

Galant GSX AWD Federal Automatic Transmission –

• 6/90-5/91 – MD166250
• 6/91-5/92 – MD172577

Galant GSX AWD California Automatic Transmission –

• 6/90-5/91 – MD166251
• 6/91-5/92 – MD172578

More DSM ECU DIY Guides

• Differences between 1G and 2G DSM
• How To Eliminate ABS from your DSM
• 1G Eliminate Power Steering How To
• 1G and 2G DSM ECU PINOUTS

Have any questions about modifying your DSM or maybe on our how to identify your DSM ECU article? Leave them for us below and let us know!