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Infiniti Q45 Maintenance and Repair



  • Stopped by my local repair shop to see about getting a trans fluid exchange done on
    an '02 Q45. They asked me if it had a dipstick for the trans, I said no and they did not
    want to do it because they could not measure fluid even though it is in with the new and out with the old. Anyone else experience this? I am not looking forward to going to
    the dealer and may not need to.
  • I have a 94 q lately I have not been able to start it normal if i disable the batt
    for about 20mins sometimes it will start but not all the time. Alarms are off and
    it does nothing when the key is turned NO SOUND FROM STARTER. Everything
    in car works fine just will not start.
  • dwash6dwash6 Posts: 2
    edited October 2010
    I replaced my rotors, pads, calipers and bleed the brakes, but for some reason unknown to me the rear brakes will not catch. The car is 1994 Q45. Any suggestion?
  • dwash6dwash6 Posts: 2
    I have a 94 Q45 my ABS light and brake pads worn message will not clear even after replacing calipers, rotors and pads. Neither will the rear brakes catch.
  • joesrjoesr Posts: 17
    I had a 94 Q45t and had a similar problem re not starting when everything else worked. - I replaced the starter relays. - There are two relays and are mounted on the firewall on the passenger side. I believe one of the relays is for the primary starter circuit and the second one is for the ignition circuit. - Your Infiniti dealer should have them either in stock or be able to readily order for you. - Good luck.
  • Hello......please help, I have lost power to all windows at once...can anyone give me some giudance?

  • Great site..I'm on my 4th Q 45 and love them !!
    91 4 door gas 285 Hp 65,000 miles :)
    I am trying to remove my Alternator and so far can;t get it out after four hours.
    I have: Removed plastic cover-Alt Belt-Outside bracket..I guess I need to remove the inside (on Block) bracket but I have stopped because I want to make sure i'm not in over my head. Does anyone have a pic of the bracket and it's mounting points or can you guide me to what is next to remove..
    IE entire idler pulley-fan-a/c compressor etc!!
    Also I can't even find the wiring that I know has to be connected..this is a very tight area not to mention the most difficult alternator I have attacked! :mad:
  • yaaryaar Posts: 2
    Hi Cobrapc,

    I'm having the same issue with my 02 Q45. Screen went dark while heat and stereo was working. I re-started the car and now only heat is working - no more stereo. Can you please tell me what did you end up doing to fix the issue?

    Thanks in advance.

    My e-mail address is

  • yaaryaar Posts: 2

    I'm having the same issue with my 02 Q45. But my screen is completely out and doesn't come back upon re-starting the car.

    Would you please let me know what did you do to fix this issue and how much did it cost you?

    Thanks in advance.

    My e-mail is

  • ariskarisk Posts: 1
    :cry: please can you help my 91 q45a all of a sudden wont start it recently snowed where i live i parked my car for 5 days it has anti-freeze in it i went to get in it and it wouldn't start it made a strange higher pitched noise everyone said its the starter well 3 starters later still wont start same sound checked the teeth on the fly wheel their fine it turns battery is new and strong someone said fuel line another said starter relay ????/ any ideas without a manual its hard to find anything we normally own fords and pontiacs :confuse:
  • Hello, recently my water pump/power steering belt snapped in half on my 1994 Q45. I went to go and replace the belt and noticed my Idler Pulley wasn't spining freely. From what i've learned that's not good. So im looking to replace the Idler Pulley. Is this an easy fix. What steps would i need to take? Your help would be greatly appreciated. Thank you.
  • As long as you can get under your car...even a jack will work. It's quite straight forward. You will need metric wrenches. Loosen the nut on the pulley first then back out the tension bolt and back to the pulley bolt remove the whole assembly.
  • thall8thall8 Posts: 1
    i have a 2002 q45 recently it was raining very hard and my vdc abs and slip light came on said malfunction what could cause this problem all of a sudden
  • '97 Q45 bought recently appx 150,000 miles, the telescopic antenna adjusted for driver access ease (went up, seat went back) a few times and then the steering goes all the way up and gets stuck there, a thousand down keypresses and the steering control yield to nothing, does move forward and backward but is stuck in an unsightly pose, need it lowered, any DIY? Is it a computer problem? cancelled the memory function, even then... has the motor suddenly gone bad? then why the forward / backward? or are their two motors inside the steering wheel?
  • joesrjoesr Posts: 17
    I have a related problem with my 2002 Q45. - The steering colume will go up and down when entering/exiting the car and the up and down feature works when I use the control on the steering colume, but it will no longer telescope in and out. - I cannot find a dedicated fuse so I am thinking it must be in the control switch. Any thoughts?
  • Did you ever resolve the issue? I now have the same problem...thanks...
  • twallytwally Posts: 5
    Proud owner of new to me 94Q 131k. Can anyone point me to assistance in correcting the issue of SLIP and TCS lights always illuminated on dash. Also, the Brake Pads Worn message appears. I'd like to correct all these issues. Thanks!
  • I have a 95 q45t with a steering issue ,appears to be alignment problem but is not. The wheel pulls to the right pretty bad and it gets worse when i steer to the left but when i yank the wheel hard to the right the steering goes back in normal alignment and doesnt go back until I turn just a little to the left. people have told me it sounds like a chassis problem. any ideas???
  • Well this is just a SWAG, but if you have 4 wheel steering (Super HICAS) perhaps there is a probelm with the rear wheel steering in that the rear wheels are somehow stuck to the right. This would make sense if it is worse when you steer to the left as the rear wheels would go right (at slow speed). And then when you yank it right the rear wheels are in sync.
  • joesrjoesr Posts: 17
    Small and obvious point, but I had a similar problem right after I bought my 94 Q45t (1997(and realized that there is a dedicated power steering reservoir in engine compartment for the HICAS to top off. - Topped it off and problem went away.
  • Saw this recent post and thought I add some info with a similiar problem I had with my 1990 Q45.

    I had a slight steering misalgnment that would change according to how hard I turned left or right. Found out when I got under the car and looked at the rack and pinion steering unit, the rubber bushing was barely hanging on that suports the rack. The one on the left.

    I got the rack out and replaced the left and right rubber bushingwith some good ones I found at a local junk yard. Problem went away. I posted the repair, outlinning the steps with photos on this site years ago, It was on my Carspace page, but thats all history now.
  • This is for (newqowner). I would like to buy some parts from you. My
  • debit55debit55 Posts: 1
    we just got a 1995 Q45 infinity. it starts and runs but just shuts off while driving . it will start back up then shut off again. Any ideas of what it could be?
  • twallytwally Posts: 5
    For starters you might want to check the fuel pump, fuel filter. Also check for a clogged catalytic converter.
  • sidwellsidwell Posts: 9
    Try the mass airflow sensor, too. Maybe clean it. If it fixes it, drive till it fails, then get one from the junk yard....also, remember your car is running on part water nowadays. Put a can of Heet or any drygas product in the tank every 3rd-4th tank.
    Goood luck,
  • my car takes at least 30 to 40 seconds to start and once it starts it smells like toxic. can any one give me a reason that may be
  • I purchased my Q45 in June 2005. It now has approx. 73,000 miles. Last week I had to replace my 4th or 5th battery. Replacing this many batteries seems to be abnormal.
    Any comments or recommendations?
  • rgintherrginther Posts: 3
    edited October 2012
    HI. I have a 94 Q45 with 116k miles. recently a mechanic removed what he called a heat shield from the under side of the catalytic converter, because it was rattling. It looked like a piece of thin, silver sheet metal. He said it wouldn't matter. Now I have a very hot smell coming from operating the car. I dont see any oil or liquid leaks in engine compartment, and no spots under parked car. Any thoughts? The car otherwise performs very well
  • Hi. I have a 94 Q45 with 116k miles. I notice that when I am backing up in reverse the car starts out at normal speed (idling, I am not pushing the accelerator) but quickly slows down and feels like the brakes have been applied. The car operates in reverse no problem, it just seems like the brakes have been activated to slow it down. Is this a normal saftey feature, a brake issue, or a transmission issue? can I safely ignore it?
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