Recall 11V548 affects 112 2010-2011 Mci D4505 motor coaches for alternator corrosion tied to fire and stall risk. Repair is free at franchised Mci dealer.
Mci is recalling 112 2010-2011 D4505 motor coaches because PennTex alternators installed in these vehicles can collect moisture at the power stud and corrode. The defect can short the alternator power stud, burn the stud or cable end, increase the risk of a fire, and discharge the battery enough to stall the coach; the dealer repair will be free once available.
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What's wrong?
The alternator on 2010-2011 Mci D4505 motor coaches supplies electrical power while the engine runs and keeps the batteries charged. A main output connection, called the power stud, carries current from the alternator into the coach electrical system. That connection has to stay clean and dry so current can pass without excess heat or resistance.
The recall concerns PennTex alternators installed in a way that lets moisture collect at the power stud. Moisture at that connection leads to corrosion at the base of the stud and nearby metal. Corrosion interferes with a high-current electrical connection, so the alternator output connection can degrade instead of carrying power cleanly.
There is no warning sign before failure. An owner or driver should treat charging problems, battery warning lights, or visible corrosion near the alternator as reasons to have the coach inspected by an Mci dealer.
Who's affected?
Spans the 2010 and 2011 model years for the D4505, with the same electrical system component in each year.
| 2010 Mci D4505 | electrical system |
|---|---|
| 2011 Mci D4505 | electrical system |
| Units affected | 112 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific bus is included.
What's the safety risk?
Corrosion at the alternator connection can create a short circuit between the power stud and alternator body. That short can burn the power stud or cable end, raise fire risk, and discharge the battery enough to stall the vehicle. Schedule the recall work soon. Repair will be free at any franchised Mci dealer once available.
What should I do?
- Check your VIN to confirm your 2010-2011 Mci D4505 is included in this recall.
- Contact Mci customer service at 1-800-241-2947 to confirm the repair path before scheduling.
- Ask a franchised Mci service center about the free alternator inspection and modification that addresses moisture, corrosion, short-circuit, fire, and stall risk.
- Bring the owner notice if you have it. If not, reference recall number 11V548 when you call.
- Drive cautiously until the alternator repair is complete, and stop using the coach if you smell burning, see electrical damage, or the battery loses charge.
What happens at the repair
At the dealer, an Mci technician inspects the alternator installation, focusing on the Penntex alternator power stud area where moisture can collect and corrosion can build up. The technician then modifies the alternator installation to address that moisture and corrosion path. The dealer repair will be free once available, with parts and labor covered under recall 11V548. Ask the service desk to confirm that the alternator installation work is included when you schedule the coach.
Timeline
| November 10, 2011 | NHTSA published the recall |
|---|---|
| November 30, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V548?
Recall 11V548 covers 112 2010-2011 Mci D4505 motor coaches equipped with PennTex alternators. Moisture at the alternator power stud can cause corrosion, a short-circuit risk, burning at the power stud or cable end, fire risk, battery discharge, or stalling. Mci will inspect and modify the alternator installation for free.
What should I do if my 2010-2011 Mci D4505 is on this recall?
Check your VIN to confirm your specific coach is included in recall 11V548. If it is, contact a franchised Mci dealer or Mci customer service at 1-800-241-2947 to arrange the alternator inspection and modification. The recall repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mci's remedy says it will inspect and modify the alternator installation free of charge. Parts and labor are covered through the recall repair path.
What is the safety risk?
The safety risk is fire or stalling. NHTSA's recall filing says corrosion at the alternator power stud creates a short-circuit risk that can burn the power stud or cable end and increase fire risk. It also lists battery discharge that can cause the coach to stall.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V548000 |
|---|---|
| Mci customer service | 1-800-241-2947 |
| NHTSA recall # | 11V548 |
| NHTSA recall # (full) | 11V548000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →