BMW 850CSi Reliability — Best and Worst Years by the Data

Quick answer

Half of all complaints arrive by 11 years of age, so 100% land after the 4-year basic warranty ends. The system owners report most is Exterior Lighting, with 1 complaints, typically at 11 years.

When it starts to break

FIG.02·BMW 850CSi — age at failure
Age at failure	Complaints	Running total	Warranty
11 years	1	100%	you pay

ROWS 1·SOURCE NHTSA complaints with incident dates

Basic warranty on this car is 4 years / 50,000 miles. Only 0% of reported failures happen inside it — the remaining 100% come out of the owner's pocket. Powertrain cover (4 years / 50,000 miles) reaches further, but it only covers the engine and transmission, which account for few of the complaints here.

What actually fails — and at what age

What waits further out is Exterior Lighting at 11 years — past every basic warranty, and the bill lands on whoever owns the car then.

FIG.03·BMW 850CSi — what fails and when
System	Complaints	Typical age	Crash	Fire
Exterior Lighting	1	11 yrs	—	—

ROWS 1·SOURCE NHTSA complaints

What else in this class

6 models share the 850CSi's vehicle class.

FIG.05·BMW 850CSi — rivals in the same class
Same class as the 850CSi	Complaints on record	Recall campaigns	Years built
Honda Civic	15,962	413	1981–2026
Ford Mustang	10,680	315	1981–2026
Nissan GT-R	33	9	2009–2026
Chevrolet Camaro	3,457	204	1981–2026
Toyota Supra	109	35	1981–2026
Nissan Sentra	6,185	158	1982–2026

ROWS 6·SOURCE NHTSA complaints and recall campaigns

The table shows totals on record; the rates per production run are in the sentence above.

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Everything on the BMW 850CSi

Recalls6 campaigns Fuel economy13 mpg best Common problems1 complaints Check a VINAgainst this exact build Cargo space10 cu ft Window stickerOriginal Monroney label Decode a VINWhat each character means About this car1981–1995

Frequently asked questions

Is the BMW 850CSi reliable?

By complaints per production run it is better than typical: 1 against 3.73 for the average car.

When do 850CSi problems usually start?

Half of all complaints arrive by 11 years of age. The most reported system is Exterior Lighting, typically at 11 years.

Will the warranty cover 850CSi problems?

Mostly not: basic cover is 4 years / 50,000 miles, and only 0% of reported failures fall inside it.

Complaint records from NHTSA, grouped by VIN production run (characters 1–11). Rates, age-at-failure and warranty coverage computed by ForCar. Model years newer than 6 years are excluded from rankings — complaints accumulate for a decade (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

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