"How reliable is the 2001 Unknown Unknown?"

"Based on 64 NHTSA complaints, the 2001 Unknown Unknown has a median complaint mileage of 30000 miles. The most common issue is EXTERIOR LIGHTING:HEADLIGHTS."

"What are common problems with the 2001 Unknown Unknown?"

"The most frequently reported component in NHTSA complaints for the 2001 Unknown Unknown is EXTERIOR LIGHTING:HEADLIGHTS, accounting for a significant portion of the 64 total complaints filed."

2001 Unknown Unknown: Reliability Data

Source: NHTSA — 64 complaints

Total Complaints

30,000mi

Median Mileage

EXTERIOR LIGHTING:HEADLIGHTS

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

9,000 25th Percentile

30,000 Median Mileage

52,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

EXTERIOR LIGHTING:HEADLIGHTS

TIRES:TREAD/BELT

TIRES

UNKNOWN OR OTHER

ELECTRICAL SYSTEM

POWER TRAIN:AUTOMATIC TRANSMISSION

STRUCTURE:FRAME AND MEMBERS

STRUCTURE

STEERING:COLUMN

VEHICLE SPEED CONTROL

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"ON DELIVERY OF TRUCK (ODOMETER READ 9 MILES) THERE WAS BRAKE NOISE(GRINDING) WHEN THE BRAKES WERE APPLIED. AFTER APPROXIMATELY 1000 MILES I HAD THE DEALER CHECK THE NOISE. THEY THOUGHT IT WAS A WARPED BRAKE ROTOR AND REPLACED THE ROTOR. THIS DIDN'T CORRECT THE PROBLEM SO THEY NEXT REPLACED THE RE..."

"I PERSONALLY KNOW 5 MEN THAT HAVE BOUGHT THIS MACHINE AND 4 OF THEM HAVE THIS PROBLEM. WHILE SITTING AT AN IDLE THE MACHINE WILL NOT DISENGAGE THE AUTOMATIC TRANSMISSION CAUSING THE MACHINE TO ROLL AWAY. IT IS DEFENITELY MUCH WORSE IN REVERSE. THE MACHINE WILL ROLL UP TO 5 - 10 MILES PER HOUR. THE I..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

Where Are Complaints Coming From?

Top states by complaint count.

CA: 8 TX: 5 MI: 4 VA: 4 WI: 4 OR: 3 OH: 3 FL: 3 NC: 3 GA: 3

Who Files Complaints?

67.2%

Original Owners

32.8%

Second+ Owners

Unknown Unknown — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1994	23	-	ENGINE AND ENGINE COOLING:ENGINE	0
1995	37	85,000	TIRES	2
1996	27	-	TIRES	2
1997	54	5,800	TIRES	8
1998	62	-	TIRES	10
1999	137	78,500	TIRES	10
2000	129	27,250	TIRES	14
2002	65	5,950	EXTERIOR LIGHTING:HEADLIGHTS	6
2003	85	4,166	LATCHES/LOCKS/LINKAGES	7

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28