1999 Jaguar XJ8 Problems
- Complaints
- 11filed with NHTSA
- Median mileage
- 90,000miles, 9 complaints with mileage
- Recalls
- 0campaigns on record
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
- NHTSA crash rating
- —overall rating starts with 2011 models
- EPA fuel economy
- 18 mpgcombined, 4.0L 8-cyl RWD · 15 city / 22 hwy
Sources: NHTSA records for the 1999 Jaguar XJ8 (complaints, recalls, investigations), EPA fuel economy. Report an error
NHTSA recorded 11 consumer complaints for the 1999 Jaguar XJ8. The part named most often is engine cooling, with 5 complaints (45% of the total), followed by transmission and drivetrain (4) and air bags (1). 9 of the complaints include a mileage, and 11% of those were filed for vehicles with under 50,000 miles; the median is 90,000 miles. Of all complaints, 1 involved a crash, 1 an injury, according to the filers. NHTSA lists 0 recall campaigns and 13 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.
- Engine cooling5 45%
- Air bags1 9.1%
- Fuel system1 9.1%
Example complaints
Engine cooling: “Engine failure `99 Jaguar XJ8 vanden plaas ( lower engine disfunction, due to deficient tensioner malfunction per dealership diagnosis) at 61,400 miles. Vehicle well maintained and checked on numerous occasions. We were sent many warnings and suggestions about other maintenance objectives, but a potential problem with tensioners was never mentioned. We know of well over a hundred cases. One dealer told us they see at least one case like ours a month and suggested that a larger dealership in northern virginia would make their numbers look skimpy. …”
NHTSA complaint #10146002, filed 2005-12, 61,400 milesTransmission and drivetrain: “My 1999 Jaguar XJ8 was fine and then I started experiencing the gear box fault coming on one day. And then when car was shut off and restarted light went away. Didn't happen again for several months and then car was parked for about a year. After about a year I installed a new battery hoping to get back on the road and the car doesn't move and the gear box fault light is on. Then while in d and car won't move until I give it gas to about 2000rpms and it'll clunk real loud and stall sometime or drive very slowly and sluggish. …”
NHTSA complaint #11255051, filed 2019-09, 170,000 milesAir bags: “The contact owns a 1999 Jaguar XJ8. The contact stated that while traveling 65 MPH, the contact ran into the rear of another vehicle. The air bags did not deploy upon impact. The police came and documented the accident. The vehicle was completely destroyed. The contact sustained bruises to the shoulder and chest. The manufacturer was contacted. The dealer stated that the air bag would not deploy until the vehicle came to a complete stop. The failure and current mileages were 170,000.”
NHTSA complaint #10501156, filed 2013-03, 170,000 milesFuel system: “Our 1999 Jaguar XJ8 has had numerous throttle body failures. It has been replaced by Jaguar and I have had to have it replaced twice. The problem with failure is that it causes a stability control failure which causes the car to be uncontrollable. In fact, my wife hit the edge of our garage entrance way do to it;s failure. I have contacted Jaguar on several occasions by letter, email and phone and they appear to be unconcerned and suggest that I continue to replace the throttle body once it goes bad. This is a real safety issue and requires the attention of your office.”
NHTSA complaint #10328223, filed 2010-04Mileage when problems were reported
11% of the 9 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 61,400 and 98,817 miles.
Complaints by year filed
Fewer than 15 complaints, too few for a reliable trend.
Fuel economy and running cost
EPA ratings for each 1999 Jaguar XJ8 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).
| Version | Engine | Transmission | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|---|
| XJ8 RWD | 4.0L 8-cyl | 5-speed automatic | 15 | 22 | 18 | $4,550 |
Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.
Recalls and investigations
NHTSA lists no recall campaigns for the 1999 Jaguar XJ8 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
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 13 on record; the latest 10 are shown.
- 10212845Apr 14, 2021Electrical system. Attachment.
- 10212844Apr 14, 2021Electrical system. Attachment.
- 10212843Apr 14, 2021Electrical system. Attachment.
- 10146032Aug 20, 2018Electrical system. A customer may report "Hood Open" message displays on IP with hood closed.
- 10146031Aug 20, 2018Electrical system. 18C - New face of InControl Touch Pro and 18C software improvements
- 10146030Aug 20, 2018Equipment. SIM card activation issues
- 10146029Aug 20, 2018Equipment. InControl Touch Pro phase 4 customer letter
- 10134968Mar 8, 2018Equipment. Jaguar Land Rover Shop Foreman Conference Call
- 10127619Dec 14, 2017Equipment. Presentation from Dealer Shop Foreman Conference Call
- 10212857Dec 1, 2012Electrical system. Mongoose Update.
Other model years of the Jaguar XJ8
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2005 | 6 | 70,500 | 0 | — | 19 | — | Not enough data |
| 2004 | 54 | 50,000 | 0 | — | 19 | Not compared (before 2008) | Rising |
| 2001 | 13 | 37,500 | 0 | — | 18 | — | Not enough data |
| 1999 | 11 | 90,000 | 0 | — | 18 | — | Not enough data |
| 1998 | 83 | 69,000 | 0 | — | 18 | Not compared (before 2008) | Falling |
Frequently asked questions
How many NHTSA complaints does the 1999 Jaguar XJ8 have?
NHTSA recorded 11 consumer complaints for the 1999 Jaguar XJ8 as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 1999 Jaguar XJ8 is reported most often?
Engine cooling is named most often, in 5 complaints (45% of the total), followed by transmission and drivetrain with 4.
Has the 1999 Jaguar XJ8 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.
What gas mileage does the 1999 Jaguar XJ8 get?
The EPA rates the 1999 Jaguar XJ8 (XJ8, 4.0L 8-cyl) at 18 mpg combined, 15 city and 22 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.
At what mileage are problems with the 1999 Jaguar XJ8 reported?
Among the 9 complaints that include a mileage, the median is 90,000 miles and the middle half falls between 61,400 and 98,817 miles; 11% 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. Fuel economy is from the EPA and DOE (fueleconomy.gov).
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.