Any ideas what would cause a 07 FX 35 to intermittently be completely dead?

Asked by Jun 30, 2015 at 11:22 AM about the 2007 INFINITI FX35 AWD

Question type: Maintenance & Repair

I replaced my battery 2 months ago because the battery was exhausted. Well in the
past few weeks sometimes I go to start it and it's completely dead. Originally I thought
I left something on, until it happened again a couple of days later. What's happening is
the truck goes from starting and running fine to absolutely dead as soon as its turned
off. The seat doesn't go to the exit position and the steering wheel doesn't move and if
you go to try and start it, there is absolutely no sign of life. No lights, no noises,
nothing. I tested the battery with a meter and it read 11.9 volts. A few odd things to
note- if I put jumper cables on the battery and touch the opposite ends very quickly,
this corrects the issue and the car starts right up with no issues whatsoever. Another
time I was sitting in the car to try to start it and it was completely dead so I popped the
hood and bam, as soon as I released the latch the lights came on, I had full power and
it started right up.

15 Answers


Check battery connections again. Remove again and make sure they are clean then reconnect. Make sure they are nice and tight. You have a loose power or ground connection.

Firebird338- My battery connections are spotless with no corrosion at all and I checked the tightness of the connection previously at the battery and they were tight. All seems to be good there.


Do not no were the ground wire to the negative side of your battery is grounded to your vehicle so you may have to run it down to check to make sure it is tight and the positive side check connections to starter to make sure they are nice and tight and also make sure starter bolts are tight.


Did you also test the alternator ?


Check connections at alternator also making sure they are tight.


Remove any relays and reinstall them. Don't buy new ones, just plug them back in. There may be a defective relay or one with corrosion on the terminals.

All good points I'm going to have to check out. However I can say I tested the battery when the truck was in a completely dead state at it registered at 11.9 volts so I'm assuming the alternator is fine along with the battery.


I am thinking you have an intermittent electrical issue that is caused by a high resistance or loose connection. Check all grounds, battery connections and the electrical connection at the starter.

Waaaait, another point i just thought of. Just before this dead issue started I noticed a headlamp would flicker off and on then turn off. Do you guys think this is related or a cause of the problem??

Excellent, thanks Bob


Also, a defective alternator will not prevent the vehicle from starting unless the battery is run down due to a bad alternator.


Matty, as an example my Corvette will go dead if the positive starter connection is loose. Many of these vehicles pull power from the starter battery cable. Not sure about your FX35. If I have time this evening I will look at my wife's G37x to see where the power is pulled from. Pretty sure the G37x will be similar to your FX35.

Thanks for the info Bob!!

Please I need an I idea how to unlock my Infiniti fx 35 when battery is dead?


Remember that there is a regular key cleverly hidden inside the fob. It is a little difficult to use since you must get it oriented in the proper alignment to work. I had the same problem with the vehicle going dead hours after I parked it. The positive terminal had loosened a bit 2-1/2 years after a new battery install.

Your Answer

Add photo

Related Questions


Looking for a Used FX35 in your area?

CarGurus has 1,458 nationwide FX35 listings starting at $4,899.


Search INFINITI FX35 Questions


#1 Tom Demyan
Tom Demyan
Reputation 240
#2 geosur
Reputation 120
#3 Racer_X
Reputation 60
View All

Related Models For Sale

20 Great Deals out of 456 listings starting at $5,995
89 Great Deals out of 3,726 listings starting at $2,000
4 Great Deals out of 86 listings starting at $5,347
Used Acura MDX
245 Great Deals out of 16,774 listings starting at $2,200
216 Great Deals out of 5,327 listings starting at $5,895
Used BMW X5
361 Great Deals out of 14,997 listings starting at $1,995
Used Honda Accord
723 Great Deals out of 78,674 listings starting at $899
Used Nissan Murano
314 Great Deals out of 22,634 listings starting at $1,800
Used Lexus RX 350
492 Great Deals out of 18,904 listings starting at $3,997
Used Jeep Grand Cherokee
779 Great Deals out of 67,452 listings starting at $1,200
34 Great Deals out of 1,093 listings starting at $3,800
74 Great Deals out of 1,679 listings starting at $4,999

Used Cars For Sale

2011 INFINITI FX35 AWD For Sale
89 listings starting at $13,995
2010 INFINITI FX35 AWD For Sale
3 Great Deals out of 80 listings starting at $12,900
2009 INFINITI FX35 AWD For Sale
6 Great Deals out of 73 listings starting at $11,000
2008 INFINITI FX35 AWD For Sale
9 Great Deals out of 128 listings starting at $7,900