1st generation · GM W-body · 1,613 complaints, 1,210 with mileage
Owners filed 1,613 complaints with NHTSA about the 2005–2009 Buick Lacrosse, and 1,210 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
Failures are spread across the mileage range, with the middle half between 39,451 and 94,500 miles. The median is 65,000 miles.
The most-reported areas are the exterior lighting (29.4% of complaints, typically around 79,000 miles), the electrical system (22.3% of complaints, typically around 70,308 miles), the airbag system (12.0% of complaints, typically around 53,700 miles).
2 recall campaigns cover this generation.
| System | Complaints | Share | Typical mileage | Middle half |
|---|---|---|---|---|
| Exterior Lighting | 474 | 29.4% | 79,000 | 56,000–108,000 |
| Electrical System | 359 | 22.3% | 70,308 | 47,000–107,450 |
| Air Bags | 194 | 12.0% | 53,700 | 32,811–78,000 |
| Steering | 114 | 7.1% | 50,000 | 27,000–82,000 |
| Engine | 45 | 2.8% | 86,413 | 60,000–110,000 |
| Power Train | 44 | 2.7% | 61,000 | 22,000–81,000 |
| Service Brakes | 40 | 2.5% | 57,000 | 40,000–100,000 |
| Suspension | 36 | 2.2% | 60,000 | 16,000–81,000 |
| Vehicle Speed Control | 34 | 2.1% | 40,000 | 23,000–84,000 |
| Structure | 33 | 2.0% | 59,000 | 25,600–82,000 |
| Year | Complaints | With mileage |
|---|---|---|
| 2005 | 414 | 298 |
| 2006 | 383 | 281 |
| 2007 | 327 | 238 |
| 2008 | 343 | 278 |
| 2009 | 146 | 115 |
Complaints about this generation are not spread evenly across the vehicle, and the systems that generate the most of them do not all fail at the same point in a car's life. The median failure across all systems here is 65,000 miles; the figures below show which parts of the car run ahead of that and which run behind.
The exterior lighting accounts for 29.4% of complaints (474 reports, 345 of them with a mileage figure), with a median of 79,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 56,000 and 108,000 miles.
A single system taking 29.4% of all complaints is a concentration worth noting. It means that for this generation, most of what owners reported came back to one area of the car rather than being distributed across many small faults.
The electrical system accounts for 22.3% of complaints (359 reports, 235 of them with a mileage figure), with a median of 70,308 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 47,000 and 107,450 miles.
The airbag system accounts for 12.0% of complaints (194 reports, 153 of them with a mileage figure), with a median of 53,700 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 32,811 and 78,000 miles.
The steering accounts for 7.1% of complaints (114 reports, 99 of them with a mileage figure), with a median of 50,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 27,000 and 82,000 miles.
The engine accounts for 2.8% of complaints (45 reports, 36 of them with a mileage figure), with a median of 86,413 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 60,000 and 110,000 miles.
The transmission and driveline accounts for 2.7% of complaints (44 reports, 37 of them with a mileage figure), with a median of 61,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 22,000 and 81,000 miles.
Within this generation, complaint volume is not constant across model years. The 2005 model year drew the most — 414 complaints — while 2009 drew the fewest at 146. The median year sits at 343.
NHTSA records 2 recall campaigns covering vehicles in this generation. A recall means the manufacturer or the regulator concluded there was a safety defect or a standard was not met, and that a free remedy is owed to owners — including second and later owners.
Recall status is specific to the individual vehicle, not the model. Checking a VIN against NHTSA's lookup is free and takes under a minute, and it is the only way to know whether a particular car has had the work done.
Of the 1,613 complaints filed against this generation, 71 reported a crash; 62 reported a fire; 49 reported an injury. Crash-involved reports represent 4.4% of the total.
These are owner-reported outcomes, not verified investigations, and they are not adjusted for how many of these vehicles are on the road. They are included because the distinction between a fault that strands a car and a fault that causes a collision is the one that matters most, and it is not visible in a complaint count alone.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 39,451 and 94,500 miles, with a median of 65,000. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the exterior lighting and the electrical system are where this generation's reports concentrate, so those are the areas worth a specific look. The electrical system in particular shows a median failure mileage of 70,308, which gives a concrete number to compare against the odometer of any car you are considering.
None of this is a substitute for a pre-purchase inspection on the individual car. Aggregate patterns describe a population; the example in front of you has its own history.
3.6L LY7 DOHC V6 timing chain stretch from wear on the chains, guides and tensioners, setting P0008/P0009/P0011/P0016 correlation codes with a cold-start rattle; aggravated by extended oil change intervals. GM issued TSBs and special coverage on the 3.6L family.
4T65-E 4-speed automatic pressure-control solenoid and 3-4 clutch wear causing harsh or delayed shifts, particularly on higher-torque 3.6L and 5.3L applications.
3.8L Series III V6 upper/lower intake and plenum sealing leaks are a lower-frequency issue than on earlier GM 3.1L/3.4L V6s; the Series III is generally the durable choice in this generation.
| Campaign | Date | Component |
|---|---|---|
| 15V519000 | 2016-05-17 | Exterior Lighting:Headlights |
| 14V355000 | 2014-09-23 | Electrical System:Ignition |