1994 Unknown Unknown Problems
- Complaints
- 18filed with NHTSA
- Median mileage
- 17,478miles, 2 complaints with mileage
- Recalls
- 0campaigns on record
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Sources: NHTSA records for the 1994 Unknown Unknown (complaints, recalls, investigations). Report an error
NHTSA recorded 18 consumer complaints for the 1994 Unknown Unknown. The part named most often is tires, with 4 complaints (22% of the total), followed by engine cooling (2) and fuel system (2). 2 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 17,478 miles. Of all complaints, 1 a fire, according to the filers. NHTSA lists 0 recall campaigns and 0 technical service bulletins for this model year.
This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Tires4 22%
- Engine cooling2 11%
- Fuel system2 11%
- Other or unknown2 11%
- Brakes1 5.6%
- Exterior lighting1 5.6%
- Steering1 5.6%
- Body and structure1 5.6%
Also reported: Suspension (1).
Example complaints
Tires: “Noticed low air pressure while doing post-trip inspection, tandem trailer left rear, pulled tire for repair and noticed tire deformed and cracking at sides of bottoms of tread grooves (belt separation in tread?- tread cupped out and deformed). Tested tire and found slow air leak, tire had air 30 miles prior to parking and trailer load was light. Dot code a07l mkor htov 297 . Tires are replacements for 1994 tires that I lost 2 treads off of and damaged the trailer and almost caused accidents from flying debris on interstate highway.”
NHTSA complaint #10038656, filed 2003-09, 23,355 milesEngine cooling: “I gave my 1994 toyota 4runner a tune up because the back drivers side spark plug wasn't firing. I took it out and it looked like green bubbled stuff had corroded the plug. My friend, who is a mechanic, said it can only be a head gasket malfunction that could cause a plug failure like this. He also said a friend of his talked to a dealer, and he said that a recall on 1994 toyota 4runner sr5 v6 3.0l engines with head gasket problems were in fact true. I would like to know if this is true, because if so, I would like toyota to fix my car.”
NHTSA complaint #710671, filed 1999-08Mileage when problems were reported
100% of the 2 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 11,600 and 23,355 miles.
Complaints by year filed
Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Recalls and investigations
NHTSA lists no recall campaigns for the 1994 Unknown Unknown in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.
Technical service bulletins
No technical service bulletins are on record for the 1994 Unknown Unknown.
Other model years of the Unknown Unknown
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2003 | 72 | 4,466 | 0 | — | — | Not compared (before 2008) | Stable |
| 2002 | 60 | 5,950 | 0 | — | — | Not compared (before 2008) | Stable |
| 2001 | 57 | 26,894 | 0 | — | — | Not compared (before 2008) | Stable |
| 2000 | 99 | 31,000 | 0 | — | — | Not compared (before 2008) | Stable |
| 1999 | 98 | 49,138 | 0 | — | — | Not compared (before 2008) | Stable |
| 1998 | 48 | 8,500 | 0 | — | — | Not compared (before 2008) | Stable |
| 1997 | 40 | 17,000 | 0 | — | — | Not compared (before 2008) | Stable |
| 1996 | 26 | — | 0 | — | — | Not compared (before 2008) | Stable |
| 1995 | 27 | 122,000 | 0 | — | — | Not compared (before 2008) | Stable |
| 1994 | 18 | 17,478 | 0 | — | — | — | Stable |
| 1993 | 10 | — | 0 | — | — | — | Not enough data |
| 1992 | 11 | 49,650 | 0 | — | — | — | Not enough data |
| 1990 | 10 | — | 0 | — | — | — | Not enough data |
| 1989 | 5 | 2,000 | 0 | — | — | — | Not enough data |
| 1988 | 9 | 2,500 | 0 | — | — | — | Not enough data |
All Unknown Unknown model years · Best and worst years by complaints
Frequently asked questions
How many NHTSA complaints does the 1994 Unknown Unknown have?
NHTSA recorded 18 consumer complaints for the 1994 Unknown Unknown as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 1994 Unknown Unknown is reported most often?
Tires is named most often, in 4 complaints (22% of the total), followed by engine cooling with 2.
Has the 1994 Unknown Unknown been recalled?
NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
At what mileage are problems with the 1994 Unknown Unknown reported?
Among the 2 complaints that include a mileage, the median is 17,478 miles and the middle half falls between 11,600 and 23,355 miles; 100% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.