Buick Rainier: which model years draw the most owner complaints?
390 complaints filed with NHTSA about the Buick Rainier, model years 2003 to 2007. No model year stands out for the engine or transmission against the others. Counts of unverified owner reports, compared only with other years of the same model; not failure rates.
Complaints by model year
| MODEL YEAR | COMPLAINTS | VS OTHER YEARS | STANDS OUT | RECALLS |
|---|---|---|---|---|
| 2003 RainierFEW REPORTS | 1 | — | 0 | |
| 2004 Rainier | 157 | — | 2 | |
| 2005 RainierFEW REPORTS | 103 | — | 1 | |
| 2006 RainierFEW REPORTS | 91 | — | 7 | |
| 2007 RainierFEW REPORTS | 38 | — | 5 |
"Stands out" = 40 or more complaints naming that system and at least twice the model's quiet (lower-quartile) year, or twice the share seen across every vehicle of that model year. Newer years have had less time on the road. "Quiet" ranks only years with 7+ years on the road and 20+ complaints. NHTSA data through November 2026.
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Other Buick models
Buick Century · Buick Enclave · Buick Encore · Buick Encore GX · Buick Envision · Buick LaCrosse · Buick LeSabre · Buick Lucerne · Buick Park Avenue · Buick Regal · Buick Rendezvous · Buick Terraza · Buick Verano. All makes and models.
Source: NHTSA public complaints, recalls, service bulletin and investigation databases, data received through November 2026. Complaints are unverified reports from owners, not failure rates: sales volumes are unknown, so a model year is only compared with other years of the same model. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Year pages: 2004