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Maintenance & Repair Maintenance & Repair - Archived Discussions Q45 Troubles 
135 messages, Last post on Jul 28, 2001 at 10:10 AM
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| I have a '94 Q45 with 49,000 miles and experience the same vibration problem. Mine occurs once between 50-55 mph and again between 70-75mph. I actually had the driveshaft replaced by the dealer, but the problem persists. Not sure what to do. | |
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My 1990 Q45 is getting a bit hot. The dealer says I have a leaky water pump (I didn't see any puddles), bad lower hoses, and need a new thermostat. The price the dealer quoted to fix was (gulp!) $1500. Parts are only about $250, the rest labor! 8 Hours to change these parts? Can this be for real? Also, shouldn't I see some steam, puddling, or notice the fluid going low? Shouldn't the overheat light come on? Do I need a second opinion (scheduled at another dealer tomorrow)? Any information or advice would be appreciated! |
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I have a 94 q45 with 76,000 miles. I also experienced vibration at 55 mph and above. It turns out to be a relatively simple problem to solve. The suspension in the Q45 is very sensitive to the type of tire used. Most tires are manufactured in an asymetrical process, except for Michelin, Toyo, and possibly others. I had a set of Pirellis on mine that were constantly needing balancing to get rid of the vibration. When I got a new set of tires, I switched to Toyos. I have had no problem with vibration since then, about 1 year ago. My experince, for the record, is good for the q45. At 60,000 I had to repalce the freeze plugs because they leaked, and a new water pump, too. The most recent problem was the A/C compressor which had to be replaced (ouch, major bucks!). Otherwise, no problems. I love the car after 3 year ownership (I bought used). I liked it enough that I just bought a new 1999 q45! I think it's the best value today in the luxury car market. |
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| I have a 1990 Q-45, purchased new and it is the best car I've ever owned. The only major repair was to replace the A/C--major bucks as "macapote" indicated. It's fun to drive and handles like a dream. I also had some balance problems with Pirell's but now have Bridgestones and the car handles better than with the original Michelins. | |
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| I am thinking of buying a 95 Q45. I hear to stay away from the models with traction control. I believe it is the Q45A. Any advice on this, for a Q45 buyer.... | |
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I have a 91 Q45 and I had the same problem where the engine was running hotter than normal especially on a warm day, and the air conditioner did not seem as cold. I didn't have any puddles or other indications except for some residue under the hood. Took it to dealer and they gave me some lame excuse about a hose clamp needed to be replaced to the tune of $135. Took it to my mechanic, he told me to have the radiator bored out. I had never had that done before so I bored it out and it made a HUGE difference. Everything is back to normal on the heating end. Several years ago I had the water pump replace on this vehicle but this problem was obvious when you shut the engine off you get a leak big enough to puddle under the car. Dealers are rip offs I have all my work done by local mechanic. He charges less than half than the dealer and does a much better job. My problem now is that my rack is leaking so I have to replace the entire rack. Dealer charge 1700, my mechanic wants $800. I'm worried other things might go like fuel injectors, tranny etc. Thinking about getting rid of it. How many miles do have on your Q and have you had any other problems? |
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The Q 45s are great cars, I love 'em, but they do have their quirks. The engines are difficult to work on and consequently expense to fix and that's just the way it is,so you have to live with it...you've got a very powerful and hi-tech V-8 under the hood. The timing belt replacement is the real killer. I don't think it's the traction control that you need fret over, but rather there was a special suspension option..some kind of adjustable setup that is quite troublesome. Last of all, the transmissions were weak, but apparently none of you have had problems, which is great...maybe these were corrected earlier. |
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| I own a 1991 Infiniti Q45, can anyone suggest a good mechanic in San Jose, CA. who specializes in fixing Infiniti cars. Thanks | |
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Dyan.... I hope you did not buy that Q45a which has the fully active suspension (FAS). I took my Q in to the dealer at 32,000 miles which was after the warrantee period and was told the FAS needed repair to the tune of $10,000. I was told to call Infiniti Corp in CA. They initially offered to pay half but withdrew the offer WITHIN minutes because I told them that a major failure to a first of its kind system, at 32,000 miles, should be fully paid for by Infiniti....Partically since the $10,000 repair would only be guarenteed for one year. $10,000 EVERY 32,000 MILES is TOO high a price to expect a customer to pay. As you can see these great cars are backed by a company that drops their customers after the pampered 4 year warrentee period is over. I would expect that from GM or Ford, but not a so called Japanese luxury car maker. |
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I have always liked the Q45, especially the 94 - 96 models and am looking to buy a used model. But, while reliability in general looks good, the costs of repairs when they do come up look shocking. $900 driveshafts? Yikes! Just how reliable is the car or am I seeing exceptional stories here, and many others are having little trouble? While the Q45 is not perfect for me (rather larger and opulent), I am continually attracted to the potent V-8, rear wheel drive (tired of front drive), appearance, and better than expected handling for a two ton car. Factor in the super low used car prices, and the thing is hard to ignore. Lastly, in mixed highway/city driving, what kind of mileage. I know premium is required. - Phil |
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