I currently have an 08 IS250 AWD. What is the biggest difference in the 09 and 10?

 

the front bumper on the 09 and 10 are slightly different than the earlier models and the tail lights are also different just slightly though nothing too major

 

I think the 09+ comes with the antenna on the roof also.

 

07 is when they added the roof antenna.

Jeff

 

06->07:
Added sharkfin antenna
Added button that really disables TRAC/VSC
Change trunk/gas buttons to illuminate

07->08:
More rear legroom
Changed illuminated scuff plate color from blue to white
Changed 18" wheels to liquid graphite color
Improved steering feel
Added coinholder
Floormats in Cashmere interior changed to black (mid-year change)

08->09:
Mid cycle facelift- changes to bumpers, lights, interior trim, etc
Turn signals added to side mirrors
Paddles enabled to operate in D
Center console jacks moved to make it easier to close lid with large plugs
Cashmere interior replaced with Ecru
Some other woodgrain colors offered

09->10:
Nav system upgraded to 6th gen (brings nav into this century- adds realtime traffic, XM now built in, HD based nav instead of DVD)
BT now available without nav and supports A2DP

10->11:
Second face lift (same type of cosmetic changes but different, as the 09 one)
HIDs get LED DRLs
AFS no longer available
Passenger memory seat no longer offered
PCS no longer offered
ML without nav no longer offered (this might've been a 2010 change- not sure)

11>12:
Nothing major I'm aware of



I left out things not relevant to AWD models (like when the X package was added and removed, or the sport/F-sport package changes) and I'm sure I missed some things, but that should've hit most of it

There's also been changes to exterior colors over the years, best source there is:
http://www.toyotareference.com/lexusis

 

08 and earlier seem to be far more modable, if that's what you're looking for... most mods seem to go for the 06-08s... I'm having trouble finding lips and such that I like that fit 09+

the lighted mirrors are amazing though on the 09+

 

The mods for bodykit's for the 2009 + years are a little more expensive.

 

ahem... The biggest difference is that the 09+ have a green digital clock instead of a white clock. Glad you asked.

 

i have an 08 is250 awd and luv it i find the 09 & 10 lights are ugly !

 

sucks that parts like a front lip cost more for the '09+ models not only that but they are somewhat harder to find

 

USB jack was added in model year 2010.

 

Around mid 2010, a production change was made to the engine of the IS250 that is supposed to solve the carbon build-up problem. It's one of the best kept secrets of this forum and IS community in general. Look for carbon buildup thread for specific VIN number info.