Faults:

Exhaust manifold.

Parking brake.

Various interior lights.

ABS sensors.

Tire pressure sensors.

Oil consumption.

Gas gauge misreading.

General Comments:

Nice car. Classic style. The parts on this car are ridiculously expensive. So become best friends with your scrap yard and mechanic.

Not many aftermarket parts, so Infiniti dealer parts high prices are unavoidable sometimes. Way too many sensors for everything makes simple repairs difficult.

People complain about the build quality. It's a 10 year old car! A high original price doesn't mean better overall quality!

My advice is buy this car as cheap as you can and use the money you saved for future repairs. The transmission can be sluggish. Changing your fluid does wonders.

Great power, still a 340 HP V8, still pulls hard. Seats are very comfortable. Interior is holding up well. Always get compliments on the car. Not too many around.

M45 running costs are high. Consider other models if you want cheaper.

Faults:

Knock on wood... nothing really.

Only things I've had to fix have been owner error (wife hitting garage, driving over large ice chunks, etc).

General Comments:

Awesome car to drive - the V8 makes this really quick, and the handling is awesome.

Due to the sportiness and 19" wheels, you certainly don't feel like you are riding on a cloud however.

Technology galore! Cooled seats, voice guided menus, adaptive cruise, pre-crash restraints, lane departure, push button start... the list goes on.

I thought I wanted a BMW, but couldn't find the same combination of features and performance.

14 speaker audio system rocks.

Faults:

High beams are focused too high.

General Comments:

Everything that you have read about this car is true (it's great). It's hard to believe anyone being disappointed with the M45 Sport.

However if you drive this car on the highway at night, you need to know that the design of the headlights is faulty. The high beams are focused so high that they do not illuminate the road in front of the car at all. There is a single adjust for both high and low beam lights, so if you take your car to the dealer, they will misalign the low beam focus if you complain of the faulty high beams.

I drive 70 miles at night on a desert highway to work daily. If you drive your M45 in town this will not be an issue, but if safe night time driving is a concern to you, beware!