Need for Speed: Underground Cheats

Enter them on the Main Menu

All you do is use your car in single player drift mode.  Use the first
track and you can gain lots of points.  I have gotten over 60000 points
on this track!

To earn a lot of style points, do a race of drift choose the 2nd track and customize Miata. Customize it with 5 or 4 Repetution points and have all performance except weight. Now choose that car and I tell U, I earned 81,000 Style points on that track.

Miata is one of the best car after full performance, but U can just reach to 17 sized rim.
If U want the size to reach 20, U can trade it with the skyline and install 20 and then trade again with the Miata or any other car and U will get 20 size rim already installed.

When you get on the main menu, type in sexy woman and they should come up.

During any Drift competition, pause the game at the moment you impact a wall. Unpause the game and you'll be rewarded with free style points.

R2, R2, R1, R2, L2, L1, Down, Up - Acura Integra

R1, R2, Down, Left, Up, Right, Left, Right - Acura RSX

Left, Right, Up, R1, R2, R1, R2, Up - Ford Focus
Up, Up, Down, Down, Up, Left, Square, R2 - Honda S2000

Left, Right, Left, Right, Up, Down, Up, Down - Hyundai Tiburon

Left, Left, Left, R1, R1, R2, R2, L2 - Mitsubishi Lancer

Up, Down, Left, Right, Square, R1, L2, R1 - Nissan 240SX

Right, Right, Down, Up, Square, L1, R1, L2 - Nissan 350Z

Right, Right, Right, L2, L2, R2, R2, Up - Nissan Sentra

Down, Down, L1, L2, L1, L2, L1, Down - Nissan Skyline

Up, Down, Down, Up, L2, Up, L2, Down - Subaru Impreza

R1, R1, R2, R1, R2, R1, L2, L1 - Toyota Supra

Up, Up, Up, Right, Down, Down, Up, Right - Lost Prophets Car

Up, Right, Up, Up, Down, Right, Up, Right - Mystikal Car

Up, Down, Up, Left, Down, Down, Up, Right - Nismo Car

Up, Up, Up, Up, Down, Up, Up, Right - Petey Pablo Car

Up, Left, Up, Up, Down, Left, Up, Right - Rob Zombie Car

R2, R2, R1, R1, Left, Right, Left, Right - Level 1 Performance Parts

R1, R1, R1, R1, R2, R2, Left, Right, - Level 2 Performance Parts

Down, Left, Up, Down, R1, R2, R2, Square - Level 2 Visual Parts

Down, R1, R1, R1, R2, R2, R2, Square - all Circuit Tracks

Right, Square, Left, R1, Square, L1, L2, R2 - all Drag Tracks

Left, Left, Left, Left, Right, R2, R1, L2 - all Drift Tracks

Up, R2, R2, R2, R1, Down, Down, Down - all Sprint Tracks

R1, Up, Up, Up, Down, Down, Down, L1 - Drift Physics in all modes

Use the following customizations to reproduce the Brian's Nissan Skyline from 2Fast2Furious:

If you're going to drift, don't drift in arcade, it will count as a loss and your win percentage drop.

Front Bumper: StrikeRear Bumper: StrikeSide Skirts: StrikeSpoiler: DragHood: Tri Slot CFRoof Scoop: PolarRims: NFS Five StarNeon: GoldMuffler: FrenzyWindow Tint: Medium BlackPaintBase Color: GoldRims: GoldEngine Accent: ChromeBrake Calipers: BlackMuffler: ChromeSpoiler: BlackVinyl1st Layer: Tear 16Color: Black (2nd Row)2nd Layer: Tribal 2Color: White3rd Layer: Tribal 21Color: Grey (2nd Row)4th Layer: Tribal 17Color: Grey (2nd Row)

Play Underground mode until you get the skyline. Make sure you have enough money to change to a VW Golf. Buy a VW golf then put all your Performance parts on it. Once you have done that, trade it to an S2000 and take all the parts off it. Once you have done that trade to a skyline (it will cost 3000)then trade back to a VW golf for a gain of about $11000 (not bad huh?), you can continue to do this for as long as you like.

Front Bumper: RenegadeRear Bumper: FlashSide Skirts: FlashHood: Double VNeon: Red or Red PulseMuffler Tip: AceWindow Tint: Medium BlackRims: BBS LMPaintBase: Black (2nd Row)Rims: ChromeEngine Accent: Red (1st Row)Muffler: ChromeBrake Calipers: Red (1st Row)

All Circuit tracks:
Down, R1, R1, R1, R2, R2, R2, Square.

All Drag tracks:
Left, Square, Right, R1, Square, L1, L2, R2.

All Drift tracks:
Right,, Right, Right, Right, Left, R2, R1, L2.

All Sprint tracks:
Up, R2, R2, R2, R, Down, Down, Down.

Drift physics for all cars:
R1, Up, Up, Up, Down, Down, Down, L1.

Acura Integra:
R2, R2, R1, R2, L2, L1, Down, Up.

Acura RSX:
R1, R2, Down, Left, Up, Right, Left, Right.

Ford Focus:
Left, Right, Up, R1, R2, R1, R2, Up.

Honda S2000:
Up, Up, Down, Down, Up, Left, Square, R2.

Hyundai Tiburon:
Left, Right, Left, Right, Up, Down, Up, Down.

Level 1 Performance Parts:
R2, R2, R1, R1, Left, Right, Left, Right.

Level 2 Performance Parts:
R1, R1, R1, R1, R2, R2, Left, Right.

Level 2 Visual Parts:
Down, Left, Up, Down, R1, R2, R2, Square.

Lost Prophets Car:
Up, Up, Up, Right, Down, Down, Up, Right.

Mitsubishi Lancer:
Left, Left, Left, R1, R1, R2, R2, L2.

Mystikal Car:
Up, Right, Up, Up, Down, Right, Up, Right.

Nismo Car:
Up, Down, Up, Left, Down, Down, Up, Right.

Nissan 240SX:
Up, Down, Left, Right, Square, R1, L2, R1.

Nissan 350Z:
Right, Right, Down, Up, Square, L1, R1, L2.

Nissan Sentra:
Right, Right, Right, L2, L2, R2, R2, Up.

Nissan Skyline:
Down, Down, L1, L2, L1, L2, L1, Down.

Petey Pablo Car:
Up, Up, Up, Up, Down, Up, Up, Right.

Rob Zombie Car:
Up, Left, Up, Up, Down, Left, Up, Right.

Subaru Impreza:
Up, Down, Down, Up, L2, Up, L2, Down.

Toyota Supra:
R1, R1, R2, R1, R2, R1, L2, L1.

1988 Nissan Skyline GTR34
Select Underground mode and complete at least the first 80 missions. A recommended car to use is the Acura RSX. You will then challenge Samantha. Defeat her on the medium difficulty setting and win the next drag race to unlock the 1998 Nissan Skyline GTR34.

Eddie's Nissan Skyline
Keep winning style points to unlock Eddie's car in the end. Note: It is faster to win them in drift. When your style meter maxes out, a message stating that you have won Eddie's Nissan Skyline will appear.

Kurt's Killer Ride
Use a Stock Mazda RX-7 and keep trying until you win.

Samantha's car
Keep getting style points until you get all the vinyls, then fill up the next meter.

Faster speed
Hold R2 for greater speed. Note: This does not work in drags.

Easy wins
If you are having trouble winning circuit, sprint, or lap knockout races, take off all of your engine performance mods. Note: This works for every car, is... 

2003 Subaru Impreza WRX STi look-alike
Put the following parts on the Impreza:

Front Bumper: Shadow
Rear Bumper: Ace
Side Skirts: Ace
Spoiler: Downforce
Hood: Trident
Rims: BBS RW2
Muffler Tip: Thunderbolt
Window Tint: Dark Black
Paint

Base: Pearlescent, bottom row, second from left (blue).
Rims: Second section, bottom row, fourth from left (gold).
Spoiler: Same as base.
Engine: Same as rims.
Brake Calipers: Same as rims.
Muffler Tip: First section, third from left (chrome).
Everything else is stock, unless you want to put performance upgrades in it.

The Mach 5 (Miata)
This car does not look exactly like the Mach 5, but is fairly close:

Front Bumper: Ace or Stock
Rear Bumper: Ace or Stock
Side Skirt: Ace or Stock
Spoiler: Stock
Hood: Stock
Roof Scoop: Stock
Rims: Konig Podium
Neon: Stock,Red,or Red Pulse
Head Lights: Voltage
Tail Lights: Chrome
Muffler: Rocket or Stock
Window Tint: Dark Blue
Paint

Base: Gloss, first section second from the right (white)
Rims: First section third from the right (chrome)
Break Pads: First section second from the right (blue)
Decals

None
Vinyl

Hood: First layer: Tear 4, color: first section third from the left (red)
Hood: Second layer: Stripe 2, color: first section third from the left (red)
You do not need to use this next vinyl.
Side: Tribal 13, color: second section third from the left (blue)

The Fast And The Furious Honda Civic
Use the following customizations to reproduce the Honda Civic from The Fast And The Furious:

Front Bumper: Storm
Rear Bumper: Storm
Side Skirt: Storm
Spoiler: Boomerang
Hood: Stock
Roof Scoop: Stock
Rims: Enkei Suzuka
Neon: Lime Neon
Headlights: Stock
Taillights: Stock
Muffler Tip: Rocket
Window Tint: Dark Black Tint
No widebody kit
Paint

Base Color: Gloss Paint, Top Row, Black
Engine Accent: Lime Green
Brake Caliper Color: White
Rim: Stock or White
Muffler: Stock or White

The Fast And The Furious Mazda RX-7
Use the following customizations to reproduce the Mazda RX-7 from The Fast And The Furious. Note: This is just a rough re-creation. There is not a lot of vinyl that matches Dom's RX-7.

Front Bumper: Ace
Rear Bumper: Snyper
Side Skirts: Strike
Spoiler: Supernova
Hood: Stock
Roof Scoop: Stock
Rims: Racing Hart S15
Neon: Red Neon
Headlights: Voltage
Taillights: Stock
Muffler Tip: Rocket
Window Tint: Stock
Paint

Base:... 

Unlock all of the Vinyls by getting enough Style Points. Fill it up one more time to get her car.

These cheats ONLY work for quick race mode, not underground
all circuit tracks- down, r1, r1, r1, r2, r2, r2, square
all sprint tracks- up, r2, r2, r2, r1, down 3x
all drag tracks- right, square, left, r1, square, l1, l2, r2
all drift tracks- left 4x, right, r2, r1, l2