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Oldsmobile Alero 1999–2004
Only generation · GM N-body (GMX130)
NHTSA data through 12 August 20262,936 complaints, 1,580 with mileageMethod
On this generation, failures are spread across the mileage range, with the middle half between 42,925 and 105,000 miles.
- Rest of the range
- Median
- 200,000+ — 38 complaints (2.4%), plotted separately
- 10%
- 22,000
- 25%
- 42,925
- Median
- 68,250
- 75%
- 105,000
- 90%
- 145,000
Show the numbers
| Mileage | Complaints | Share |
|---|---|---|
| 0–5,000 | 45 | 2.8% |
| 5,000–10,000 | 22 | 1.4% |
| 10,000–15,000 | 32 | 2.0% |
| 15,000–20,000 | 25 | 1.6% |
| 20,000–25,000 | 56 | 3.5% |
| 25,000–30,000 | 35 | 2.2% |
| 30,000–35,000 | 55 | 3.5% |
| 35,000–40,000 | 60 | 3.8% |
| 40,000–45,000 | 84 | 5.3% |
| 45,000–50,000 | 68 | 4.3% |
| 50,000–55,000 | 73 | 4.6% |
| 55,000–60,000 | 60 | 3.8% |
| 60,000–65,000 | 107 | 6.8% |
| 65,000–70,000 | 79 | 5.0% |
| 70,000–75,000 | 71 | 4.5% |
| 75,000–80,000 | 61 | 3.9% |
| 80,000–85,000 | 78 | 4.9% |
| 85,000–90,000 | 44 | 2.8% |
| 90,000–95,000 | 38 | 2.4% |
| 95,000–100,000 | 49 | 3.1% |
| 100,000–105,000 | 40 | 2.5% |
| 105,000–110,000 | 27 | 1.7% |
| 110,000–115,000 | 37 | 2.3% |
| 115,000–120,000 | 28 | 1.8% |
| 120,000–125,000 | 27 | 1.7% |
| 125,000–130,000 | 40 | 2.5% |
| 130,000–135,000 | 30 | 1.9% |
| 135,000–140,000 | 28 | 1.8% |
| 140,000–145,000 | 21 | 1.3% |
| 145,000–150,000 | 8 | 0.5% |
| 150,000–155,000 | 23 | 1.5% |
| 155,000–160,000 | 20 | 1.3% |
| 160,000–165,000 | 15 | 0.9% |
| 165,000–170,000 | 6 | 0.4% |
| 170,000–175,000 | 11 | 0.7% |
| 175,000–180,000 | 6 | 0.4% |
| 180,000–185,000 | 12 | 0.8% |
| 185,000–190,000 | 12 | 0.8% |
| 190,000–195,000 | 3 | 0.2% |
| 195,000–200,000 | 6 | 0.4% |
| 200,000+ | 38 | 2.4% |
What this can and cannot tell you: these are complaints owners chose to file, not a failure rate. Popular models accumulate more of them simply by being common. How this is built.
Owners filed 2,936 complaints with NHTSA about the 1999–2004 Oldsmobile Alero, and 1,580 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 42,925 and 105,000 miles. The median is 68,250 miles.
The most-reported areas are the electrical system (21.5% of complaints, typically around 85,000 miles), the exterior lighting (14.3% of complaints, typically around 65,000 miles), the hydraulic brake circuit (12.4% of complaints, typically around 35,000 miles).
1 recall campaign cover this generation.
What fails, and when
- Electrical system85,000median 85,000 miles, middle half 56,000 to 128,000
- Exterior lighting65,000median 65,000 miles, middle half 47,000 to 97,000
- Hydraulic brake circuit35,000median 35,000 miles, middle half 20,000 to 65,000
- Engine and its cooling system60,000median 60,000 miles, middle half 40,000 to 79,000
- Visibility equipment63,000median 63,000 miles, middle half 41,000 to 84,000
- Suspension64,000median 64,290 miles, middle half 44,000 to 80,000
- Airbag system75,000median 75,000 miles, middle half 44,000 to 125,000
| System | Complaints | Share | Median | 25–75% |
|---|---|---|---|---|
| Electrical system | 630 | 21.5% | 85,000 | 56,000–128,000 |
| Exterior lighting | 420 | 14.3% | 65,000 | 47,000–97,000 |
| Hydraulic brake circuit | 364 | 12.4% | 35,000 | 20,000–65,000 |
| Engine and its cooling system | 269 | 9.2% | 60,000 | 40,000–79,000 |
| Visibility equipment | 178 | 6.1% | 63,000 | 41,000–84,000 |
| Suspension | 112 | 3.8% | 64,000 | 44,000–80,000 |
| Airbag system | 103 | 3.5% | 75,000 | 44,000–125,000 |
| Fuel system | 101 | 3.4% | 70,000 | 49,000–96,000 |
| Steering | 100 | 3.4% | 90,000 | 48,000–130,000 |
| Body structure | 95 | 3.2% | 50,000 | 29,000–80,000 |
Which systems, and when
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 68,250 miles; the figures below show which parts of the car run ahead of that and which run behind.
The electrical system accounts for 21.5% of complaints (630 reports, 386 of them with a mileage figure), with a median of 85,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 56,000 and 128,000 miles.
The exterior lighting accounts for 14.3% of complaints (420 reports, 289 of them with a mileage figure), with a median of 65,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 47,000 and 97,000 miles.
The hydraulic brake circuit accounts for 12.4% of complaints (364 reports, 101 of them with a mileage figure), and it fails early — a median of 35,000 miles, well before the vehicle's overall median. Failures clustered this far below the rest of the car usually point to a design or manufacturing problem rather than wear, because wear does not selectively target one system on low-mileage examples. The middle half of these reports falls between 20,000 and 65,000 miles.
The engine and its cooling system accounts for 9.2% of complaints (269 reports, 159 of them with a mileage figure), with a median of 60,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 40,000 and 79,000 miles.
Visibility equipment accounts for 6.1% of complaints (178 reports, 85 of them with a mileage figure), with a median of 63,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 41,360 and 84,000 miles.
The suspension accounts for 3.8% of complaints (112 reports, 60 of them with a mileage figure), with a median of 64,290 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 43,500 and 80,000 miles.
Differences between model years
Within this generation, complaint volume is not constant across model years. The 2000 model year drew the most — 810 complaints — while 2004 drew the fewest at 175. The median year sits at 477.
Recalls and what they cover
NHTSA records 1 recall campaign 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.
Reported severity
Of the 2,936 complaints filed against this generation, 126 reported a crash; 43 reported a fire; 116 reported an injury; 7 reported a fatality. Crash-involved reports represent 4.3% 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.
What this means if you are buying one
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 42,925 and 105,000 miles, with a median of 68,250. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the electrical system and the exterior lighting are where this generation's reports concentrate, so those are the areas worth a specific look. The exterior lighting in particular shows a median failure mileage of 65,000, 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.
Documented problems
Engine - Intake Manifold 1999–2004 (3.4L V6)
3.4L LA1 lower intake manifold gasket failure allowing coolant into the oil or external coolant leaks; tied to the Dex-Cool-era nylon/silicone gasket design shared across GM 3.1L/3.4L 60-degree V6s. Often precedes overheating and head gasket damage.
Electrical - Anti-Theft 1999–2004
Passlock II ignition-cylinder sensor degradation causing intermittent crank-no-start with security lamp.
Hvac 1999–2004
Blower motor resistor / control failure leaving the fan stuck on one speed or dead.
By model year
| Year | Complaints | With mileage |
|---|---|---|
| 1999 | 702 | 253 |
| 2000 | 810 | 410 |
| 2001 | 549 | 313 |
| 2002 | 406 | 275 |
| 2003 | 294 | 203 |
| 2004 | 175 | 126 |
Recalls (1)
| Campaign | Date | Component |
|---|---|---|
| 14V400000 | 2014-09-08 | Electrical System:ignition |
What owners reported
I bought this vehicle new in florida...From day 1 there has been excessive wind noise coming from the driver side of the vehicle. It sounds like a window is left open. Took to various service dealership to complain of this problem...Various things have been done by the service dept., But the problem still persist.…
1999 · 10 miles · Body structure
Bought the vehicle new in florida...From day one, the parking brake has never worked right...Will not hold the vehicle on a hill when parking brake lever fully engaged. Took the vehicle to dealer service centers several times...Parking brake would work for a few weeks, but would return to previous state of not…
1999 · 10 miles · Parking brake
Occasionally, vehicle will not start after sitting for about an hour...Vehicle will try to start...Tachometer will fluctuate, but the engine ends up stalling. In order to start the vehicle, the ignition key has to be held in the start position longer than usual...About 5 seconds. Took to various dealer service…
1999 · 5,000 miles · Transmission and driveline
On the way from work one day after a rain shower, i use the power driver window to roll down the window for some fresh air. When i power rolled up the window, there were deep scratches on various places on the window. TSB#98831520 took to dealer service dept to repair under warranty. It was fixed but three days…
1999 · 8,000 miles · Visibility equipment
Built from 1,580 NHTSA complaints with mileage · snapshot 2026-08-12 · open data · reproduce this page