NASCAR 09 Codes -

Cheat Mode
From the main menu, go to "My Nascar", click on "EA Extras", choose "Cheat Codes" and enter the following codes to unlock corresponding cheat function:

Walmart Everyday - Unlock Walmart Car and Walmart Track (Chicago Pier).

Achievements
Complete each achievement to get the allotted gamerscore:

Are You Experienced? (10) - Win a Sprint Driver Challenge Event.
Chase Champion (50) - Win a Sprint Cup Series Championship in Career.
Kid Dyno-mite (10) - Achieve a Top Speed of 200+ MPH.
Mach 1 (25) - Achieve a 761 Rep Rating.
Movin' On Up (50) - Achieve a 3,000 Rep Rating.
Chase for the Cup™ (50) - Qualify for the Chase for the Cup™ in Career.
Craftsman Champion (25) - Win a Craftsman Truck Series Championship in Career.
Cross Country (75) - Drive 5,000 Total Miles.
Custom Car Creator (10) - Complete a Custom Car for all racing series.
Experience Wanted (25) - Win 10 Sprint Driver Challenge Events.
Keep On Truckin' (10) - Win a Craftsman Truck Series race (minimum of 11 opponents).
Nationwide Champion (25) - Win a Nationwide Series Championship in Career.
Top of the World (25) - 100 Rated Car for All Track Types.
Trade Your Setup (10) - Upload a Car Setup to EA Locker.
Nationwide Reward (10) - Win a Nationwide Series race (minimum of 11 opponents).
Online Horsepower (50) - Win a Ranked Race on Xbox LIVE.
Sprint Ahead (10) - Win a Sprint Cup race (minimum of 11 opponents).
The Ultimate Experience (75) - Complete All Sprint Driver Challenge Events.
To the Top (100) - Achieve a 5500 Rep Rating.
Unfriendly (10) - Take track ownership from a friend.
We're Talkin' About Practice (10) - Record a Lap in "Test and Tune" Mode.
Worst to First (10) - Win a race after starting in last place (minimum of 11 opponents).