this post was submitted on 18 Jul 2024
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Mechanic Advice

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submitted 2 months ago* (last edited 2 months ago) by venusaur to c/mechanicadvice
 

2001 Infiniti QX4

Placard on car says 26 psi cold

Tires say 32-49

Rear tire is set to 27 cold

Does this look under-inflated? What’s the lowest I should go?

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[–] RestrictedAccount 16 points 2 months ago (1 children)

I would 1)go with the vehicle placard as the default and and limit driving until I 2)call a reputable dealership

I think it was the Ford Explorer that required lower tire pressure because the vehicle was a rollover threat at normal inflation pressures. But people were worried that the tires would blow out if under inflated. There were a ton of lawsuits.

They did a 60 minutes piece about Jeeps on this too.

It was a mess.

[–] venusaur 3 points 2 months ago

Damn. I feel like 26 is pretty low. Some old threads about R50’s said they had a TSB raising it to 30 so that’s where I’m at now. Dealership said follow placard but the car is so old they don’t know or care