Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE
Component Locations
COMPONENT LOCATIONS
| Component | Location |
|---|---|
| BCM | Behind Driver's Side Of Instrument Panel. See Fig 1 . |
| Data Link Connector (DLC) | Next To Engine Hood Release. See Fig 2 . |
| LCU 01 (Driver's Door Control Module) | In Driver's Door |
| LCU 02 (Passenger's Door Control Module) | In Front Passenger's Door |
| LCU 03 (Right Rear Door Control Module) | In Right Rear Door |
| LCU 04 (Left Rear Door Control Module) | In Left Rear Door |
| LCU 05 (Driver's Seat Control Module) | Under Driver's Seat |
| Multi-Remote Control Relay | In Right Front Corner Of Trunk Compartment. See Fig 3 . |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.