| Acura | 
						On a label inside the driver's door jamb. The code should begin with a letter. | 
					
					
						| BMW | 
						Inner strut tower on the driver or passenger side of car. The code should contain three numbers. | 
					
					
						| Cadillac | 
						Under the trunk mat on a label. Should be a two-digit code ending in U or a WA number that is four digits long. | 
					
					
						| Chevrolet | 
						Under the trunk mat on a label. Should be a two-digit code ending in U or a WA number that is four digits long. | 
					
					
						| Chrysler | 
						On a metal tag in the engine bay on the radiator support. The code is three characters. | 
					
					
						| Dodge | 
						On a metal tag in the engine bay on the radiator support. The code is three characters. | 
					
					
						| Eagle | 
						On a metal tag in the engine bay on the radiator support. The code is three characters. | 
					
					
						| Ford | 
						On a label inside the driver's doorjamb. The code should be two digits, normally two letters or a letter and a number. | 
					
					
						| Geo | 
						On a metal tag in the engine bay on the firewall. The code should be two digits ending in U or a WA number that is four digits long. | 
					
					
						| Honda | 
						On a label inside the driver's door jamb. The code will begin with a letter. | 
					
					
						| Hyundai | 
						On a label inside the driver's door jamb. The code will be two digits. | 
					
					
						| Infiniti | 
						On a metal tag in the engine bay on the firewall. The code should be three digits, normally two letters and a number. | 
					
					
						| Isuzu | 
						On a metal tag in the engine bay on the firewall. The code should be at least two digits long. | 
					
					
						| Lexus | 
						On a metal tag in the engine bay on the firewall. The code should be three digits always beginning with a number. | 
					
					
						| Mazda | 
						On a metal tag in the engine bay on the firewall. The code should be three digits long. | 
					
					
						| Mercedes | 
						On a metal tag in the engine bay on the radiator support. The code should be three numbers. | 
					
					
						| Mitsubishi | 
						On a metal tag inside the engine bay on the firewall. The code should be three digits, always starting with a letter. | 
					
					
						| Nissan | 
						On a metal tag inside the engine bay on the firewall. The code should be three digits, normally two letters and a number. | 
					
					
						| Plymouth | 
						On a metal tag in the engine bay on the radiator support. The code is three characters. | 
					
					
						| Pontiac | 
						Under the trunk mat on a label. Should be a two-digit code ending in U or a WA number that is four digits long. | 
					
					
						| Saturn | 
						Under the trunk mat on a label. Should be a two-digit code ending in U or a WA number that is four digits long. | 
					
					
						| Subaru | 
						On a metal tag in the engine bay on the radiator support. Should be a three-digit code, with the first two digits being numbers (the third may be a number or a letter). | 
					
					
						| Toyota | 
						On a metal tag in the engine bay on the firewall. The code should be either three numbers or a number a letter and a number. | 
					
					
						| Volkswagen | 
						On a label under the trunk or on the driver's rear wheel well. Code should start with an L" and be four digits long. | 
					
					
						| Volvo | 
						On a label under the hood near the driver or passenger strut towers. The code should be three numbers long. 
							 
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