See also:

Front seat-mounted side-impact supplemental air bag and roof-mounted curtain side-impact supplemental air bag systems
The side air bags are located in the outside of the seatback of the front seats. The curtain air bags are located in the side roof rails. These systems are designed to meet voluntary guidelines to h ...

INFINITI Vehicle Immobilizer System keys
You can only drive your vehicle using the master or valet keys which are registered to the INFINITI Vehicle Immobilizer System components in your vehicle. These keys have a transponder chip in the key ...

Ride & Handling
Midsize luxury cars run the gamut from comfortable to rigid; the M is closer to rigid, though not so much that it's punishing to drive. My test car last year had the Sport package — which augments ...