Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Buick Lacrosse owners, lightly cleaned up (personal details are redacted by NHTSA).
Odometer Fraud. The contact purchased a 2007 Buick Lacrosse. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. The mileage at the time of the purchase was 77,000. It was later discovered that the actual mileage was 131,000. The Carfax Report mileage was not available.
Low beam headlights randomly turn off while driving at night and day. Causing not to be able to see the roadway at all. Very dangerous!!! They give no warning at all. Only the low beams do this. Bright lights are not affected. There was a recall for this issue but they said my car was not affected. But it is 100% affected by this recall. Ot seems like the Headlamp driver module is overheating. It gets extremely hot. This issue almost caused a very serious accident .
Taken car to dealership for computer analysis and was told that the issue was caused by P0420cataylic converter needed to be replaced. I had cataylic converter replaced elsewhere and noticed that wasn't the problem. After doing some research I found that ignition switch is the reason my car stalls while driving. There was a Product Safety Recall (14299) Ignition key rotation and replaced on 10- 8-20 but I'm having the same problem.
The relays in my fuse box had exploded and burned the wire bundle from the fuse box to the engine.. All of the electrical components in my vehicle stop working and there was evidence of a fire in the fuse box . The fuse box and the wire bundle from the fuse box to the engine had to be replaced an\t a cost of $1700.00,
The headlamp driver module burned a hole in the engine fuse box. The hdm is now fused into the fuse box and can't be pulled out to replace it. Recall 14v-755 will replace the hdm. But the GM said I have to pay for the replacement of the fuse box. The hdm failed as the recall said.
I was getting off of work and as I tried to open my car I noticed the remote wasn't work. As I approached my vehicle I smelled something burnt. Figured it was coming from the alley. I noticed my windshield wipers were up. I manually opened the car and it smelled worse of burnt. Noticed that nothing was working inside my vehicle. I call security to come and help me and as we open the hood it smelled just as bad. We noticed that the fuse box had a melted hole in it. Once it opened several fused were burnt. I have read that several people have had the same issue. I wish u let us upload pictures of this incident. What if while driving my car had caught on fire or something worse could have happened to me or my child. Luckily I was out of my vehicle when this problem occurred. This issue has to be looked at. …
The low beams on this vehicle had been flickering on and off at night for a few days. Then the low beams would not come on at all on the night of December 2, 2012, high beams worked but the smell of burning plastic filled the car and I immediately shut off the engine. Upon inspection I found one of the relays, presumably the low beam relay, burned and melted inside the fuse block causing a small fire inside the fuse compartment which fortunately contained the fire but destroyed the entire fuse panel (block). This appears to be a well documented and common problem on the 2007 Buick Lacrosse and yet there is no recall. This is a top tier safety concern as it is only a matter of time before there is a fatality associated with this safety issue. I had the car repaired at a Buick dealer for a total of $616.15. …
The car was driven on the freeway. Smell of something burning coming from the hood area. Take the next exit, smoke start coming out of the hood. Stop the car check the hood and the underhood fuse block was burning. The whole fuse is damaged so is the engine harness. It looked like the headlamp driver module and the fog lamp micro-relays were the ones that melted first and cause the fuse box to burn. I couldn't figure out why the fuse box just burned that's why I started looking online if someone else has the same problem. It seems a few people has the same problem. I guess there are unreported cases as well. Something should be done before someone get hurt because it looks like this is a problem the 2007 Buick Lacrosse has. The car has not been fixed yet. Still trying to find out if it is still worth fixing...updated 10/05/14...updated 01/12/15 the main wiring harness was replaced. …
Tl* the contact owns a 2007 Buick Lacrosse. After the vehicle was shut off, the headlights remained illuminated for over an hour without warning. The contact noticed a burning odor emitting from the vehicle and discovered that the head lamp driver module, located in the fuse box, was melted. The vehicle was taken to a dealer where the technician stated that the head lamp module needed to be replaced. The vehicle was not repaired. The contact received notification of NHTSA campaign number: 14V755000 (exterior lighting); however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure. The failure mileage was 86,022. VIN tool confirms parts not available. Updated 06/14/16
Tl* the contact owns a 2007 Buick Lacrosse. The contact stated that while driving at an unknown speed, the headlights became inoperable without warning. The vehicle was taken to the dealer where it was diagnosed that an unknown electrical part needed to be replaced. The vehicle was repaired. The contact received notification of NHTSA campaign number: 15V519000 (exterior lighting) however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure. The failure mileage was 37,000. VIN tool confirms parts not available. Updated 04/08/16
Related recalls
Electrical system › Ignition
This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring.
Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 23, 2014.
Electrical complaints in other Lacrosse years
Frequently asked questions
How common are electrical problems on the 2007 Buick Lacrosse?
NHTSA has 75 complaints about the electrical system of the 2007 Buick Lacrosse, 30% of the model year's 250 complaints. The component named most often is instrument cluster/panel (2 mentions).
Is there a recall for 2007 Buick Lacrosse electrical problems?
Yes — NHTSA recall 14V-355 (ignition, Jun 23, 2014). Recall repairs are free at authorized dealers.
At what mileage do 2007 Buick Lacrosse electrical problems start?
Half of the complaints with a recorded mileage happened before about 80,000 miles, and 2% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 15 fires and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.