E46 (4th generation) · E46 · 395 complaints, 295 with mileage
Owners filed 395 complaints with NHTSA about the 1999–2005 Bmw 3 Series, and 295 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
46% of failures occur beyond 100,000 miles — a wear pattern. The car generally reaches substantial mileage before trouble starts.
The most-reported areas are the airbag system (19.5% of complaints, typically around 95,000 miles), the exterior lighting (19.2% of complaints, typically around 96,000 miles), the transmission and driveline (11.4% of complaints, typically around 100,000 miles).
1 recall campaign cover this generation.
| System | Complaints | Share | Typical mileage | Middle half |
|---|---|---|---|---|
| Air Bags | 77 | 19.5% | 95,000 | 67,000–119,000 |
| Exterior Lighting | 76 | 19.2% | 96,000 | 70,000–123,000 |
| Power Train | 45 | 11.4% | 100,000 | 77,000–132,000 |
| Structure | 41 | 10.4% | 89,241 | 72,000–125,000 |
| Electrical System | 41 | 10.4% | 107,152 | 85,000–140,000 |
| Suspension | 15 | 3.8% | 84,200 | 29,000–128,000 |
| Engine And Engine Cooling | 12 | 3.0% | 86,500 | 69,000–128,000 |
| Latches/Locks/Linkages | 9 | 2.3% | — | — |
| Unknown Or Other | 8 | 2.0% | — | — |
| Visibility | 7 | 1.8% | — | — |
| Year | Complaints | With mileage |
|---|---|---|
| 1999 | 6 | 6 |
| 2000 | 111 | 94 |
| 2001 | 49 | 36 |
| 2002 | 40 | 34 |
| 2003 | 67 | 47 |
| 2004 | 93 | 61 |
| 2005 | 29 | 17 |
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 95,000 miles; the figures below show which parts of the car run ahead of that and which run behind.
The airbag system accounts for 19.5% of complaints (77 reports, 35 of them with a mileage figure), with a median of 95,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 67,000 and 119,000 miles.
The exterior lighting accounts for 19.2% of complaints (76 reports, 54 of them with a mileage figure), with a median of 96,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 70,000 and 123,000 miles.
The transmission and driveline accounts for 11.4% of complaints (45 reports, 44 of them with a mileage figure), with a median of 100,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 77,000 and 132,000 miles.
Body structure accounts for 10.4% of complaints (41 reports, 32 of them with a mileage figure), with a median of 89,241 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 72,000 and 125,000 miles.
The electrical system accounts for 10.4% of complaints (41 reports, 34 of them with a mileage figure), with a median of 107,152 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 85,000 and 140,000 miles.
The suspension accounts for 3.8% of complaints (15 reports, 13 of them with a mileage figure), with a median of 84,200 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 29,000 and 128,000 miles.
Within this generation, complaint volume is not constant across model years. The 2000 model year drew the most — 111 complaints — while 2005 drew the fewest at 29. The median year sits at 58.
The first year of the generation, 2000, sits above the median. That is a common pattern — early production of a redesigned vehicle tends to surface problems that later years do not repeat — and it is worth weighing when choosing between years.
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.
Of the 395 complaints filed against this generation, 12 reported a crash; 10 reported a fire; 19 reported an injury. Crash-involved reports represent 3.0% 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, a late-failure pattern shifts the question from whether to when. 46% of reported failures occur beyond 100,000 miles, so an example approaching that figure is approaching the range where other owners started reporting problems. The middle half of all failures falls between 69,000 and 128,000 miles.
On inspection, the airbag system and the exterior lighting are where this generation's reports concentrate, so those are the areas worth a specific look. The airbag system in particular shows a median failure mileage of 95,000, 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.
Rear subframe mounting point cracking: the trunk floor tears around the points where the rear subframe bolts to the body, because the spot welds and sheet metal are inadequate for the loads. Widespread across MY1999-2006 sedans and coupes; a US class action was filed in 2006 and settled in 2009. BMW's official remedy injected structural foam, which stiffened the area without addressing the weak spot welds, so recurrence is common.
Plastic thermostat housing, expansion tank and water pump failures causing overheating.
M54 oil filter housing gasket and valve cover gasket leaks — oil onto the belt and exhaust.
DISA intake manifold flap valve pivot failure, which can send debris into the engine.
S54 connecting rod bearing wear (M3 only), subject to a BMW rod bearing replacement campaign.
| Campaign | Date | Component |
|---|---|---|
| 21V401000 | 2021-07-12 | Air Bags:Frontal:Driver Side:Inflator Module |