Misfire or rough idle on the 2001 Volkswagen Jetta
When misfire or rough idle gets reported
Owners of the 2001 Volkswagen Jetta report misfire or rough idle at a median of 47,500 miles. A quarter of the reports come in before 30,000 miles and a quarter after 77,500 miles, from 45 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 2nd most-reported problem on this model year.
The mileage distribution
The reported range runs from 20,000 miles at the tenth percentile to 97,500 miles at the ninetieth, a spread of 78,180 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
27% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 18,820 miles | 30,000 miles | 46,391 miles | 77,822 miles | 97,000 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $250–$1,600 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 18 model years of this car. It shows up earliest on the 1998, at a median of 1 miles, and latest on the 2009 at 210,000 miles.
By volume the 2001 is the worst of them, which makes this a problem of this specific year rather than of the model as a whole.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
The number of misfires and failed coilpack's on my '01 vw jetta 1.8t is ridiculous. I know of several people going through the same thing. When the car was under warranty is was in the shop at least 3 times for the same misfire problem and now that I'm out of warranty the problem is still very persistent. Vw needs to officially recall these coil packs with something that works properly. This problem is going to affect my ability to pass my state emissions testing and seriously effects my driveability and reliability.. Vin # [xxx]... Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr
Ignition coil failures on my 2001 jetta gls 1.8t. 3 coils failed leading to a very dangerous driving situation where I could not accelerate out of a potentially dangerous situation. Vw changed only 3 coils, saying they were having problems with ignition coils, but will not change a part unless it fails. The 4th coil failed yesterday, 12/17/02 and vw is out of coils nationwide. I spend quite a bit of time on many vw and audi car owner web-boards and the problem is running rampant. Check www.vwvortex.com, www.audiforums.com to name a few, then do a web-search in archived items in the audi forum or specific chat rooms in the vw forum. This problem will costs lives if it is not addressed immediately.
Coil failed on 2001 vw jetta 1.8 t, at 18400 miles,manufacturor defect,vw is having the coil remanufactured. Dealer says part could take up to 2 months because of back orders.this simply states they can't keep up with the supply and demand as so many have to be replaced. Part should be recalled and dealer replace all 4 coils.
Also reported on the 2001 Volkswagen Jetta
Other body or interior problem
Tail light, brake light or signal failure
Other engine problem
Other electrical problem
Other visibility problem
Other powertrain problem
How far this goes
Complaints are voluntary, so 65 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does misfire or rough idle happen on the 2001 Volkswagen Jetta?
Across 45 owner reports that included an odometer reading, half were filed by 47,500 miles. A quarter were filed before 30,000 miles and a quarter after 77,500 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is misfire or rough idle on the 2001 Volkswagen Jetta?
65 reports have been filed with NHTSA, about 1.4 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed