What breaks most · 2004 to 2005 model years
BMW 545i problems by year
Owners have filed 122 safety complaints with NHTSA about the BMW 545i across model years 2004 to 2005. Two years stand out: 2005 for air bags complaints and 2004 for air bags complaints.
- Years to check closely: 2005, 2004
- Complaints on file
- 1222004 to 2005, all trims
- Worst year
- 200578 complaints
- Crashes reported
- 34 fires · 4 injuries · 0 deaths
- Typical failure mileage
- 92kMedian where owners gave mileage
- Recall campaigns
- 0Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 44 | 1 | 0 | Air bags (18) | |
| 78 | 2 | 0 | Air bags (34) |
What fails on the 2005 BMW 545i
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| Air bags | 44% |
34 | 1 | Check recalls for air bags on NHTSA.gov |
| Powertrain and transmissionTransmission parts | 19% |
15 | 1 | Shop all powertrain and transmission parts, not filtered to this vehicle |
| Electrical systemAlternators, starters and ignition | 18% |
14 | 0 | Shop electrical system parts for the 2005 BMW 545i |
| Seat belts | 12% |
9 | 0 | Check recalls for seat belts on NHTSA.gov |
| Brakes (hydraulic)Brake pads, rotors and calipers | 9% |
7 | 0 | Shop brakes (hydraulic) parts for the 2005 BMW 545i |
| SteeringPower steering pumps, racks and hoses | 6% |
5 | 0 | Shop steering parts for the 2005 BMW 545i |
| Seats | 5% |
4 | 0 | — |
| Wheels | 5% |
4 | 0 | — |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
An excessively harsh 2-1 downshift when decelerating to a stop, or transmission "bangs" into gear when accelerating from a full or a "rolling" stop (vehicle did not come to a complete stop). *js
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Electrical wiring in headlights are disintegrating. The shielding is dry rotting and flaking off nearly every wire in both headlights causing them to malfunction during driving. Lights will cut off randomly. I'd imagine the wires are shorting out.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which BMW 545i years have the most problems?
By NHTSA complaint volume, 2005, 2004 carry the most filings on the BMW 545i. The 2005 alone has 78 complaints, led by air bags.
What is the most common BMW 545i problem?
On the 2005 model year, the most-reported component is air bags with 34 complaints. The table above lists the top components for every year.
At what mileage do BMW 545i problems start?
The median mileage at failure across all BMW 545i complaints that include mileage is about 92,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.