{"make": "BMW", "model": "3 Series", "segment": "luxury-sedan", "canonical": "https://cars.insightarise.com/bmw/3-series/", "generated": "2026-09-04", "data_through": "2026-09-02", "method_version": "2026-09-04", "source": "NHTSA Office of Defects Investigation: owner complaints, safety recalls and defect investigations", "units": {"complaints": "count of owner complaints on record for the model year", "per_year": "complaints per year the model year has been on the road (counted from 1 January of the model year; minimum 1 year)", "idx_vs_*": "per_year divided by the comparison group's mean per_year; 1.00 = same rate", "early": "complaints filed within the first 24 months after 1 January of the model year", "recent_12m": "complaints filed in the last 12 months of data", "severe": "complaints reporting a crash or a fire (each complaint counted once)", "recall_covered_share": "share of complaints whose broad component category also has at least one recall (a category match, not proof that the recall covers the complaint)"}, "limitations": "Counts are not adjusted for sales volume; complaints are self-reported to NHTSA and not verified individually; U.S.-market vehicles only.", "summary": {"make": "BMW", "model": "3 Series", "segment": "luxury-sedan", "term_shares": {"stall": {"count": 19, "share": 8.7}}, "years": [{"year": 2018, "complaints": 59, "per_year": 6.8, "recalls": 0, "severe_share": 15.3, "idx_vs_all": 0.16, "early": 6, "early_closed": true, "early_idx": 0.07, "recent_12m": 1, "recent_trend": null, "top_group": "engine", "investigations": 0, "park_warnings": 0}, {"year": 2019, "complaints": 41, "per_year": 5.3, "recalls": 0, "severe_share": 17.1, "idx_vs_all": 0.13, "early": 8, "early_closed": true, "early_idx": 0.1, "recent_12m": 17, "recent_trend": "rising", "top_group": "engine", "investigations": 0, "park_warnings": 0}, {"year": 2020, "complaints": 52, "per_year": 7.8, "recalls": 0, "severe_share": 11.5, "idx_vs_all": 0.19, "early": 5, "early_closed": true, "early_idx": 0.09, "recent_12m": 26, "recent_trend": "rising", "top_group": "engine", "investigations": 0, "park_warnings": 0}, {"year": 2021, "complaints": 33, "per_year": 5.8, "recalls": 0, "severe_share": 12.1, "idx_vs_all": 0.14, "early": 4, "early_closed": true, "early_idx": 0.07, "recent_12m": 23, "recent_trend": "rising", "top_group": "engine", "investigations": 0, "park_warnings": 0}, {"year": 2022, "complaints": 8, "per_year": 1.7, "recalls": 0, "severe_share": 12.5, "idx_vs_all": 0.04, "early": 6, "early_closed": true, "early_idx": 0.08, "recent_12m": 2, "recent_trend": null, "top_group": "wheels", "investigations": 0, "park_warnings": 0}, {"year": 2023, "complaints": 12, "per_year": 3.3, "recalls": 1, "severe_share": 25.0, "idx_vs_all": 0.08, "early": 7, "early_closed": true, "early_idx": 0.08, "recent_12m": 4, "recent_trend": null, "top_group": "hvac", "investigations": 0, "park_warnings": 0}, {"year": 2024, "complaints": 10, "per_year": 3.7, "recalls": 0, "severe_share": 50.0, "idx_vs_all": 0.09, "early": 8, "early_closed": true, "early_idx": 0.11, "recent_12m": 5, "recent_trend": null, "top_group": "electrical", "investigations": 0, "park_warnings": 0}, {"year": 2025, "complaints": 4, "per_year": 2.4, "recalls": 0, "severe_share": 25.0, "idx_vs_all": 0.06, "early": 4, "early_closed": false, "early_idx": null, "recent_12m": 3, "recent_trend": null, "top_group": "electrical", "investigations": 0, "park_warnings": 0}], "first_year": 2018, "last_year": 2025, "n_years": 8, "complaints": 219, "recalls": 1, "recall_by_year": [{"year": 2023, "count": 1}], "park_warnings": 0, "ota_recalls": 0, "crashes": 21, "fires": 15, "injuries": 18, "deaths": 0, "severe": 36, "severe_share": 16.4, "top_group": "engine", "by_group": [{"group": "engine", "count": 65, "share": 29.7, "ratio": 1.34, "page": true, "by_year": [{"year": 2018, "count": 19, "share": 32.2}, {"year": 2019, "count": 10, "share": 24.4}, {"year": 2020, "count": 20, "share": 38.5}, {"year": 2021, "count": 12, "share": 36.4}, {"year": 2022, "count": 1, "share": 12.5}, {"year": 2023, "count": 1, "share": 8.3}, {"year": 2024, "count": 2, "share": 20.0}, {"year": 2025, "count": 0, "share": 0.0}], "recent_12m": 30, "prior_12m": 15, "recent_trend": "rising", "keywords": [{"term": "fire", "docs": 21, "ratio": 11.9}, {"term": "engine starter", "docs": 8, "ratio": 347.2}, {"term": "oil filter", "docs": 10, "ratio": 66.7}, {"term": "housing", "docs": 11, "ratio": 42.1}, {"term": "coolant", "docs": 16, "ratio": 7.8}, {"term": "overheating", "docs": 10, "ratio": 18.5}]}, {"group": "electrical", "count": 49, "share": 22.4, "ratio": 1.42, "page": true, "by_year": [{"year": 2018, "count": 10, "share": 16.9}, {"year": 2019, "count": 6, "share": 14.6}, {"year": 2020, "count": 14, "share": 26.9}, {"year": 2021, "count": 10, "share": 30.3}, {"year": 2022, "count": 1, "share": 12.5}, {"year": 2023, "count": 3, "share": 25.0}, {"year": 2024, "count": 3, "share": 30.0}, {"year": 2025, 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xDrive, M3), 5 Series Sedan (530i, 530i xDrive, M5), 4 Series Gran Coupe (430i, 430i xDrive), 4 Series Coupe (430i, 430i xDrive, M440i xDrive), 4 Series Convertible (430i, 430i xDrive, M440i xDrive), 8 Series Coupe (840i, M850i xDrive, M8), 8 Series Convertible (840i, M850i xDrive, M8), 8 Series Gran Coupe (850i xDrive, M8), X3 SAV (X3 xDrive30i, X3M), X4 SAV (X4 xDrive30i), X5 SAV (X5 xDrive40i, X5 M50i, X5M), X6 SAV (X6 xDrive40i, X6 M50i, X6M), and Z4 sDrive30i, Z4 M40i vehicles.  The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.", "consequence": "Transmission oil that leaks into the control unit can lead to a seizure of the transmission gears, causing a sudden loss of drive power and increasing the risk of a crash.", "remedy": "Dealers will replace the transmission mechatronics module and the automatic transmission fluid, as necessary, free of charge.  Owner notification letters were mailed January 26, 2024.  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