2007 Buick allure, 4 beeps every 5 min even when no power connected.

Remove the glove compartment and the heater box cover. you should be able to get to them.

On the steering wheel

check alarm system some have a battery back up. it will sound when battery back gets below 5 volts

Here's the link and I'm sure you will get the solution of your problem Buick Allure LaCrosse Workshop Service Repair Manual 2005 2006 2007 2008...

Either there is weight on the other seat or it is shorting out. Try clipping all the seat belt(s) closed and if this 'fixes' the light problem try with undoing the belts one at a time and driving it that way. When the problem comes back then that will be the belt circuit that is the problem. Check for worn cables, loose connections etc.

You will probably have to replace the air bag.

look on Youtube for the How To remove a inside door panel they have lots and maybe your for your car.

Very carefully. Make sure your body is grounded so as to prevent electrical discharge that could activate the bag. Maybe it's something better left to the pros.

this might help:
Here is the Technical Service Bulletin that maybe of help, worth looking into but can't guarantee that it would fix your problem Steering - Steering Column Clunking When Turning TECHNICAL Bulletin No.: 01-02-32-001P Date: November 25, 2009 Subject: Clunk Felt/Noise Heard From Steering Column, Steering Gear and/or Front Of Vehicle During Turning Maneuver and/or Steering Wheel Rotation (Replace Intermediate Shaft As Directed) Models: 2001-2004 Buick Regal 2005-2008 Buick Allure (Canada Only), LaCrosse 2000-2008 Chevrolet Impala 2000-2007 Chevrolet Monte Carlo 1998-2002 Oldsmobile Intrigue 2004-2007 Pontiac Grand Prix Supercede: This bulletin is being revised to add the 2008 Buick LaCrosse/Allure. Please discard Corporate Bulletin Number 01-02-32-001O (Section 02 - Steering). Condition Some customers may comment on a clunk type noise coming from the front of the vehicle while driving during a turning maneuver.
1. Locate a large area (parking lot) where the vehicle can be turned in a tight circle. 2. Turn the steering wheel to the right and/or left all the way to the steering lock, then off the steering lock a 1/4 turn. 3. Drive the vehicle approximately 5 km/h (3 mph) in a circle, preferably over rough pavement or seams on the road surface. 4. Drive the vehicle straight ahead at idle speed while applying and releasing the brake pedal. Listen/feel the steering wheel for the clunk/noise condition. 5. If a clunk is felt in the steering wheel, the MOST likely cause is the I-shaft - not the steering gear. Continue with the correction. Correction DO THIS - Replace the intermediate shaft DON'T DO THIS - DO NOT lube the intermediate shaft Replace the existing intermediate shaft

RE SET PAS KEY INTER LOC