I am looking to do some light mods, and I found this info on part numbers, and I though y'all might find it useful. From the Sylvania website, so ignore the Sylvania - specific wording.

BTW, I'm thinking doing the VLED switchback LEDs for my turn signals - anybody ever seen these in person?

Sedan
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2009 INFINITI G37 (Sedan)
High & low beam headlamp
HID-D2S

Parking light
2827

Front turn signal
992 (7440A)

Rear turn signal
7440
7440ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
7440LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
LED

Stop light
LED

High mount stop light
LED

Fog/Driving light
9006
9006SU Silverstar ULTRA for Ultra Night Vision - The Whitest and Brightest Halogen
9006ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
9006EB EcoBright - Your Environmental Choice
9006XV XtraVision Halogen - The Brighter Light
9006CB Cool Blue Halogen - The Whiter Light

License plate
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp

Back up light
921
921ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
921LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
2827

Rear sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Map light
DE3175
DE3175LL Long Life Upgrade: Up to twice the life of the standard lamp
7443LL Long Life Upgrade: Up to twice the life of the standard lamp

Trunk/Cargo area
158

Coupe
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When two or more lamps are listed for the same application, remove the lamp and check the numerical designation.
2009 INFINITI G37 (Coupe)
High & low beam headlamp
HID-D2S

Parking light
2827

Front turn signal
992 (7440A)

Rear turn signal
7440
7440ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
7440LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
LED

Stop light
LED

High mount stop light
LED

Fog/Driving light
H1
H1ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H1XV XtraVision Halogen - The Brighter Light

License plate
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp

Back up light
921
921ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
921LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
2827

Rear sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Map light
DE3175
DE3175LL Long Life Upgrade: Up to twice the life of the standard lamp
7443LL Long Life Upgrade: Up to twice the life of the standard lamp

Trunk/Cargo area
158

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The applications presented in this replacement guide have been compiled using the best information available from the vehicle manufacturers at the time of your search. This guide is intended for general information purposes only, not to be construed as any type of warrantee as to any particular application. For specific applications the vehicle owner's manual should be consulted.
When two or more lamps are listed for the same application, remove the lamp and check the numerical designation.