Few things are more stressful than buying a vehicle — new or used — only to experience serious engine problems shortly after driving it home. Engine defects are among the most expensive and dangerous vehicle issues consumers face. The good news? State Lemon Laws and the federal Magnuson-Moss Warranty Act may protect you.
In this article, we’ll break down:
- The most common engine problems we see
- Warning signs your vehicle may be a lemon
- How Lemon Law can help
- How the Magnuson-Moss Warranty Act protects used car buyers
- What compensation may be available
Common Engine Issues That Could Signal a Lemon
Not every engine problem qualifies under Lemon Law. However, recurring or serious defects often do.
Here are some of the most common engine problems we see in consumer cases:
1. Engine Stalling or Sudden Shutdown
If your vehicle shuts off while driving — especially at highway speeds — it is not just inconvenient, it’s dangerous. Repeated stalling can qualify as a substantial safety defect under most state Lemon Laws.
2. Excessive Oil Consumption
Some vehicles burn oil at abnormal rates, requiring constant top-offs between oil changes. Manufacturers sometimes claim this is “normal,” but excessive oil consumption can lead to catastrophic engine failure.
3. Knocking, Ticking, or Loud Engine Noises
Persistent knocking or ticking sounds may indicate internal engine damage such as rod bearing failure or valve train issues. If repairs don’t fix the issue, this may qualify as a defect under warranty.
4. Engine Misfires or Rough Idling
Jerking, hesitation, loss of power, or shaking while driving can indicate ignition system problems, fuel delivery defects, or internal engine damage.
5. Check Engine Light That Won’t Stay Off
If the check engine light repeatedly turns on despite repair attempts, your vehicle may meet the “reasonable number of repair attempts” requirement under Lemon Law.
6. Overheating
Recurring overheating can cause severe engine damage. If the manufacturer cannot permanently fix the issue, you may have legal options.
When Does an Engine Problem Qualify Under Lemon Law?
While each state’s Lemon Law is slightly different, most require:
- The defect substantially impairs the vehicle’s use, value, or safety
- The manufacturer is given a reasonable number of repair attempts
- The issue occurs within the warranty period
A “reasonable number” is often defined as:
- 3–4 repair attempts for the same issue
- OR the vehicle is out of service for 30 cumulative days
- OR one repair attempt for a serious safety defect
If your engine problem persists after multiple visits to the dealership, your vehicle may qualify.
What About Used Vehicles?
Many consumers believe Lemon Law only applies to brand-new cars. That’s not always true.
Even if your vehicle does not qualify under your state’s Lemon Law, the Magnuson-Moss Warranty Act — a federal law — may protect you.
The Magnuson-Moss Warranty Act Protects Consumers When:
- The vehicle was sold with a written warranty
- The manufacturer fails to repair defects within a reasonable number of attempts
- The defect substantially impairs the vehicle
Unlike some state Lemon Laws, Magnuson-Moss often applies to used vehicles that are still under a manufacturer’s warranty or even certain dealer warranties.
Another major benefit?
If you win, the manufacturer must pay your attorney’s fees. That means consumers can pursue claims without paying out of pocket.
What Remedies Are Available?
Depending on the law that applies, you may be entitled to:
- A vehicle buyback (refund of purchase price minus a small usage deduction)
- A replacement vehicle
- Cash compensation
- Payment of attorney’s fees and costs
In engine defect cases, buybacks are common when the manufacturer cannot permanently repair the problem.
What Should You Do If You’re Experiencing Engine Problems?
If you suspect your vehicle may be a lemon:
- Always bring it to an authorized dealership for repairs.
- Keep copies of all repair orders.
- Document the dates and days out of service.
- Do not ignore warning lights or worsening symptoms.
The sooner you evaluate your rights, the better.
Don’t Keep Paying for a Defective Vehicle
You should not be stuck making payments on a vehicle with a failing engine. Manufacturers have legal obligations under both state Lemon Laws and the Magnuson-Moss Warranty Act.
If your engine problems keep coming back — or the dealership keeps saying “no problem found” — it may be time to speak with an experienced consumer protection attorney.
