Quick answer
The 2010 Infiniti M45, the latest model year on record, is 193.3″ long, 70.9″ wide and 57.9″ tall on a 113.8″ wheelbase, and weighs 4,070 lb. At 16.1 ft it fits a standard garage and leaves 1.9 ft spare in an 18-foot street space.
Every Infiniti M45 generation, measured
The biggest change came in 2006: the new car was 3.9″ shorter and 86 lb heavier than the 2003–2004 one.
| Generation | Length | Width | Height | Wheelbase | Curb weight |
|---|---|---|---|---|---|
| 2003–2004 | 197.2″ | 70.1″ | 57.5″ | 110.2″ | 3,882 lb |
| 2006–2010 | 193.3″ | 70.9″ | 57.9″ | 113.8″ | 3,968 lb |
ROWS 2·SOURCE NHTSA vPIC / Transport Canada
M45 year by year
| Model year | Length | Width | Wheelbase | Curb weight | Body styles |
|---|---|---|---|---|---|
| 2010 | 193.3″ | 70.9″ | 113.8″ | 2 | |
| 2009 | 193.3″ | 70.9″ | 113.8″ | 2 | |
| 2008 | 193.3″ | 70.9″ | 113.8″ | 2 | |
| 2007 | 193.3″ | 70.9″ | 113.8″ | 1 | |
| 2006 | 193.3″ | 70.9″ | 113.8″ | 1 | |
| 2004 | 197.2″ | 70.1″ | 110.2″ | 1 | |
| 2003 | 197.2″ | 70.1″ | 110.2″ | 1 |
ROWS 7·SOURCE Transport Canada vehicle specifications
Will a M45 fit
| Space | Typical size | This car | Verdict |
|---|---|---|---|
| Single garage | 20 ft deep | 16.1 ft | Fits, with room to open the door |
| Street parking space | 18 ft | 16.1 ft | Fits comfortably |
| Standard parking bay width | 8.5 ft wide | 5.9 ft | Room to open doors both sides |
ROWS 3·SOURCE ForCar, computed from vehicle dimensions
Against cars of the same length
| Measure | This car | Typical of 987 cars within 10″ of its length | Difference |
|---|---|---|---|
| Width | 70.9″ | 73.6″ | −2.7″ |
| Wheelbase | 113.8″ | 111.8″ | +2.0″ |
| Curb weight | 4,070 lb | 3,984 lb | +86 lb |
ROWS 3·SOURCE ForCar, computed across vehicles of similar length
M45 against its rivals
Next to the Chrysler 300C, Buick Lucerne and Hyundai Azera, the M45 is the narrowest of the four.
| Model | Model year | Length | Width | Curb weight |
|---|---|---|---|---|
| Infiniti M45 (this car) | 2010 | 193.3″ | 70.9″ | 4,070 lb |
| Chrysler 300C | 2010 | 196.9″ | 74″ | 4,136 lb |
| Buick Lucerne | 2011 | 203.1″ | 73.6″ | 3,880 lb |
| Hyundai Azera | 2009 | 192.9″ | 72.8″ | 3,633 lb |
ROWS 4·SOURCE NHTSA vPIC / Transport Canada; rivals: same EPA class and body, most searched
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Everything on the Infiniti M45
Frequently asked questions
Is the 2010 M45 bigger than the 2009?
No. The 2010 and 2009 M45 are the same size, within half an inch and 22 lb of each other.
Which is bigger, the M45 or the Chrysler 300C?
The 2010 Chrysler 300C is 3.6″ longer and 66 lb heavier than the 2010 M45.
Dimensions from NHTSA vPIC and Transport Canada vehicle records, manufacturer-declared for 7 M45 model years, 2003 to 2010. Metric values converted to inches and pounds; generation boundaries are estimated from changes in size (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.
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