I took my '99 Isuzu Trooper to get an oil change, and 3 weeks later the oil light turned on. I went to the Isuzu dealership where I bought the car and after checking the oil, they noticed that there are less than a liter in the engine. They filled it and added a conditioner telling me that that should fix the problem. A few months later, driving back from a trip, the engine began knocking and the oil light came on again. Moments later I lost power (rpms) and pulled the car over. The mechanic who looked at my car told me (and this was confirmed by a consumer report website) that '99 Troopers often have "unexplained loss of oil pressure resulting in the engine seizing." The car now needs a new engine (approx 4000-9000 dollars) or a new car. Nothing has been done to correct the failure or defect.

- Monument, CO, USA

Engine dies while driving at various speeds. From 5 mph to 60 mph. Dies while turning, then steering wheel locks up. Almost been in a few accidents. Has happened several times this summer. Seems to be a common problem. Engine also burns 1qt oil ever 1,000 miles.

- Baltimore, MD, USA

: the contact stated while driving 45mph, there was a knocking noise within the engine compartment area. The vehicle was taken to an independent repair shop for inspection. The mechanic determined there was sludge in the engine and the oil was dry although the vehicle received regular maintenance. The mechanic replaced the engine.

- Atlantic, PA, USA

My 1999 Isuzu Trooper engine seized up. No warning light or any indications that any thing was wrong. Towed it to a mechanic and they said it had no oil in it. I had just purchased the vehicle 1 month earlier and had the oil changed/filled immediately after the purchase. I had driven it less than 2000 miles. I now see this problem has been well documented on the internet. Now I am having to replace an engine which could be more than the cost of the vehicle because the manufacturers oil consumption defect and lack of low oil gauge/warning.

- Austin, TX, USA

I purchased a new Trooper in 1999 and did every required maintenance on time at a authorize Isuzu dealer. After the 5 year 60,000 mile warranty was up we started taking it to a reputable national oil change company. We never had any indication it was using oil at an abnormal rate. It was not leaking oil, it was not burning oil and the oil light was not coming on. One day the oil light came on and my wife immediately pulled over and we added oil. It would run rough and took it to a mechanic who did some maintenance work. I had not totally wrecked the engine. I got it driving good for about $2,000 and hoped this had fixed the problem. We added and check the oil every 500 miles. Two months later the engine seized and I am now told I need a new engine. After searching the internet I have found many others have had this engine oil problem. Estimated costs to replace the engine are $4K-$6K which is about blue book for the Trooper and now I would have no confidence in putting a 1999 engine with known problems in as a replacement.

- Salt Lake City, UT, USA

Burning too much oil with absolutely no warning. My check oil light has never come on. Have taken it for 3,000 mile oil changes a couple times to find no oil and no trace of oil in it, though I had filled it to where the dipstick registered full within the last seventy miles. I can't make a decent stab at estimating how much it burns because it seems to be fine and then be empty. It doesn't leak anywhere and it doesn't smell like it's burning it, but it's just gone. I have to stay on top of this all of the time; it's a drag. I'm going to go check it now while I'm thinking about it. I am wondering if whatever this defect is affecting my mileage because I only get 16 mpg. My mechanics say the only thing I can do is get the engine rebuilt. I do wish Isuzu would help out here. I like the vehicle and am not in a position to have the engine rebuilt or buy another car. I would also feel badly selling this to someone knowing the engine could lock-up with no notice. And if I tell them, who would buy it?

- Millboro, VA, USA

We bought a 1999 Trooper from the dealer that was never registered, but that the dealer had driven for 14,000 miles. We were told by the dealer that a new factory warranty applied as we were the "original retail purchaser." After driving this vehicle three years and less than 60,000 miles, the engine froze going up a mountain pass, endangering our lives and our grandchildren's lives. We had the vehicle towed and now have been told that we needed an new engine -- though there was still oil in the engine, there were shards of metal in the oil. (we had properly maintained the engine more than required under warranty but it seemed to burn a lot of oil over the last few months.) Isuzu denies that it is responsible, and the dealer denies that they are responsible, so we are now stuck with a vehicle we've had three years that will cost us $5,000 - $8,000 to repair (and that we still owe 11K on and is worth 6K as a trade-in or 8K if we sell it ourselves). I now see other evidence of similar complaints about this vehicle on this site and have talked with other mechanics who have seen similar problems with this vehicle, yet most consumers don't seem to file these reports. I've had several vehicles, and maintain them well, and have never had an engine freeze with 71,000 miles on it. As neither Isuzu nor the dealer has been able to provide any assistance nor stand behind their product, I hope that the NHTSA investigates this issue so that no other owners or passengers are placed in potentially deadly and certainly costly circumstances again.

- Richland, WA, USA

I have a 99 Isuzu Trooper that burns a lot of oil. I service it properly and take good care of it. Although it now has 64000 miles on it and is now out of warranty I think I need to report this. I have talked to my dealer and I am taking it in for some work that will as they say correct this problem. Are there others out there that are having this problem.

- Tulsa, OK, USA

1999 Isuzu trooperii engine failed. No oil was the engine and had seized up while the vehicle was in motion. The engine failure was found to be prevalent in 1998-200 Isuzu Troopers. The claims were denied in reference to the oil issues. The consumers claim was denied.

- Rochester, NY, USA

My orginal complaint #10104322 was submitted 11/04. Since then I have paid Isuzu and fox motor in grand rapids, mi about $7500 for a new engine. After many attempts Isuzu of America would not listen to me and even hung up on me. Fox motors was great. They advised the reason my engine froze up is a common problem with this engine. The egr pipe gets clogged with "sludge" resulting in no oil getting from the bottom to top half of the engine. They advised to have egr pipe cleaned and PCV valve replaced every 15,000 miles or one year. I'd like to sue Isuzu of America as I'm out a total of $8,500 due to, what I'm being advised, is a design failure in the early 3.5L V6 engines. It's obvious many others have incurred similar problems. I hope this suggestion by a "great" Isuzu mechanic is helpful to others. Fyi, I own two other Isuzu (unlucky me!).

- Leawood, KS, USA

I own a '99 Isuzu Trooper. Since about 70K miles (about a year ago), it has been burning oil at a really high rate. I have met personally two other Trooper owners with this problem who were lucky enough to get new engines out of Isuzu, but since I was over the warranty, I don't qualify. Now I have read many other similar complaints on the NHTSA site and wonder why Isuzu has not been held accountable for this? I cannot afford to replace my engine, nor can I in good conscious trade it in and make it someone else's problem. I am burning 3 quarts of oil for every 300 - 500 miles! I am afraid to take it on any trips to visit family! I feel I am being punished for owning this vehicle and keeping it in good repair!

- Brunswick, ME, USA

Isuzu Trooper 1999 problem after problem, engine burning oil. After the engine was replaced, the engine light illuminated at least 30 times. The dealer gave the consumer all types of excuses until finally they said they didn't know what was causing the light to illuminate. There were other problems such as a hard shift with the transmission, water leaking through the sun roof, difficulty starting the vehicle, uneven tire wear, in just 65,000 the consumer has gone through 3 complete sets of tires. The consumer was told there was a problem with the frame of the vehicle and it could not be aligned. The tie rods were replaced because they were defective. In the past the vehicle lunged forward while the consumer had her foot firmly pressed on the brake. The vehicle intermittently idled high while stopped. The vehicle has rolled backwards while it was in park. Another mechanic informed the consumer the previous dealer installed several electrical componets incorrectly and there were also some defective parts that needed to be replaced which caused the engine light to come on. The consumer was getting poor gas mileage.

- Washington, DC, USA

99 Isuzu Trooper uses oil in excess and is now leaking coolant from under motor "?" go figure!! it's not even at 70,000 yet. Isuzu needs to help customers who have purchased their worthless vehicles. It seems they knew exactly what mileage to stop the warranty at!

- Pontotoc, MS, USA

While driving 70 mph on a mi freeway, our car engine quit. Fortunately we were not in traffic and we were able to coast up an off ramp. Aaa trailered the 1999 Trooper to a former Isuzu dealership who, three days later, advised that the engine "froze up" and that we would need an entirely new engine. It should be noted that there was oil in the crankcase and that no warning lights went on until after the engine died. We are paying to trailer the car to ks to have it checked by the dealer where we purchased the car and, presumably, the regional Isuzu representative. We are the original owners and the car has been serviced regularly; unfortunately, it's past the warranty period/mileage. There is no explanation for this mechanical failure but, a call to Isuzu of America, only had them say they've fulfilled their obligation. Had the car died in traffic, their been no exit ramp or shoulder, or my wife stranded alone in a desolate place, there could have been serious consequences other than just the financial consequences we now have. Fyi, the initial estimate is $7,500 to replace with a used engine provided a good used engine can even be located.

- Leawood, KS, USA

Engine started normally, then as driving along, momentary power surge and partial stall, accompanied shortly thereafter by engine misfire, and coolant exiting exhaust. Turned vehicle off and had towed to dealership. Vehicle has approximately 42,000 miles on it and has been well maintained. Factory warranty up to 60,000 expired from a time basis a few months ago, and dealer will accept no responsibility for head warpage due to manufacturing defect or improper head gasket installation at factory. Replacement cost for new engine is approximately $6700. Currently starting a legal claim against Isuzu.

- Tucker, GA, USA

I bought a 1999 Isuzu Trooper limited edition 1 year ago this month. Since buying it I have had the starter replaced, the alternator replaced twice, the small block was bad because of a failure with the dipstick to read the correct amount of oil. My son was involved in a mva due to the fact that the vehicle would not stop as the engine decided to race while he was coming to a slow stop. Thank god no one was injured in the accident. The car revs up at an idle at a stop or slowing down position, and now the vehicle is in the garage because the transmission is bad and the alternator went again. The front windshield is not properly sealed and the window fogs up if you don't run the defroster. The draft that comes from the floor on the drivers side is unacceptable. I bought this car with less than 30,000 miles on it and it now has less than 50,000. I really don't understand why a vehicle with this low mileage has so many problems and it is in the shop more than it is out. I expected to have some problems with a used vehicle but not this many and not this costly! I have been reading about many similar problems with this year of Trooper and I'm wondering what it's going to take to have the company stand up and take responsibility.

- Parkersburg, WV, USA

I own a 1999 Isuzu Trooper with around 77000 miles on the odometer. I and my family enjoyed the vehicle untill about 1 year ago (10-03) when, on a 250 mile run from san antonio to my home, without any warning lights, strange sounds or rough running, I heard a loud whine from the engine compartment, everything lit up like a christmas tree for a second and then went completely dead. After a long. Hot wait and an even longer tow, I had the vehicle checked out and was told that the engine was locked up tight as a drum and that there was around 1 quart of oil in the pan. During my ownership of the truck, I had noticed that the dipstick would occasionally and unexpectedly read low - but it never visibly burned any oil. I chalked it up to a 'dipstick malfunction' and kept up with my oil changes and maintenance. I have owned many classic and high performance vehicles in the past and am a stickler for preventative maintenance. My immediate thought was that my previous oil change had been done incorrectly - but my own diligence in checking the oil prior to my trip and adding a needed quart steered me away from that as a solution. Now, after an attempt to locate a replacement engine for the truck online, I find that I'm not alone by any means. Being out of warranty (just) leaves me with the belief that I will just have to eat the cost of getting the vehicle back on the road, but I feel that, given the number of similar stories out there, Isuzu should pony up and assist those who can prove their stories. After 1 full year without a second vehicle and minus the initial $159 for towing and initial diagnosis, my truck is currently being re-diagnosed and repaired at a trusted facility after a second costly tow. Initial estimates have indicated that if a replacement engine is required, I will be out around $3000-$4000 for the engine plus an additional $1000-$2000 in labor. I will lodge a second report once the vehicle has been repaired indicating the accurate total billing.

- Grand Prairie, TX, USA

I have a 99 Trooper with 70K miles on it. The engine starts to burn oil and now it burns 5 quarts of oil within 3 months. No warning light. I heard the ticking sound. When I took it to a garage, I was told the engine was bone dry. This is the second time it happens. Last time it runs out of oil in 4 months. I do oil change on a regular 30K miles basis and I do other maintenance too. I feel I am risking losing the engine any time if I don't check the dipstick every week. This is awful. Isuzu should recall this model or at least do something. It is so unfair for car owners like me.

- Ga, GA, USA

I bought a 1999 Isuzu Trooper in February with almost 45,000 miles. My wife and I had our babies in febrauary and this was to be her car. On July 3 the engine blew. The car at this point had 47,000 miles on it. The car had a 5 year, 60,000 mile warranty. The dealer says it will cost $7,000 to $8,000 to get a new motor. I have since done some research and found that quite a few Trooper's have had this problem, whereby the engine either loses all of it's oil very quickly or uses it at a rate it should not.

- Columbia, SC, USA

I have a 1999 Isuzu Trooper that has a chronic oil consumption problem. I had the dealer replace piston rings at 22,000 miles but it did not significantly reduce the problem. No, I am noticing a number of Trooper owns with the same problem or even with engines that have seized from a direct result of the problem. I spoke to the local Isuzu service rep in New Jersey and he finally owned up to the fact that my particular year has a know engine defect that will cause it to burn oil. I burn it at a rate of approximately 700 miles to a quart of oil. The rep has told me that they could replace the engine but with the replacement there is no guarantee I would get better than 1000 miles per quart of oil.

- New Providence, NJ, USA