Last updated: 2026-10-10
BMW 4 Series Reliability by Year
Used BMW 4-Series coolant leaks and airbag warnings are the main worries. The 2024 is the year to buy, and the 2020 is the one to skip.
BMW 4 Series Reliability Overview
Sudden coolant loss from a cracked oil filter housing and a passenger airbag warning from a failed seat sensor mat are the costly problems to watch on this coupe. Its standing is good, yet it sits well below average among coupes, so a clean service history matters. Favor the 2024 or 2022, and skip the 2020, one of the two lowest-rated years.
Current generation: 2nd gen (2020–2023).
Best & Worst BMW 4 Series Years
Best BMW 4 Series Years to Buy
Based on reliability index scoreThe 2024 has been on the road long enough to judge, and its record is far cleaner than the 2020. It has fewer recalls, far fewer owner complaints, and a much lower complaint rate per car sold. Its main complaints are brakes and weak parking alerts, and two of the brake reports name the 760i instead.
BMW 4 Series Years to Avoid
Coolant leaks lead the complaints. Dealers traced them to the heat management module, oil filter housing and hoses. Some owners lost coolant in seconds and needed a tow, and one car caught fire while idling and was totaled. Others say they waited months for parts on a starter fire-risk repair. Side-impact airbags failed to deploy in some serious crashes.
BMW 4 Series Reliability Score Trend
BMW 4 Series reliability has improved in recent years, with newer models scoring an average of 65/100 compared to 55/100 for older years.
Scores 0–100. Higher is better.
| Year | Score | Rating |
|---|---|---|
| 2018 | 54/100 | Mixed |
| 2019 | 55/100 | Mixed |
| 2020 | 52/100 | Mixed |
| 2021 | 57/100 | Mixed |
| 2022 | 66/100 | Good |
| 2023 | 63/100 | Good |
| 2024 | 66/100 | Good |
| 2025 | 67/100 | Good |
| 2026 | 64/100 | Good |
Year-by-Year Reliability
2026 BMW 4 Series
4 recalls · 0 complaints
Middle of nine scored years, with four recalls covering exterior lighting, seat belts and the electrical system, and no owner complaints filed so far.
2025 BMW 4 Series
9 recalls · 2 complaints
Strongest-rated 4-Series year with just two owner complaints, though it carries nine recalls and ranks below average among 2025 coupes.
2024 BMW 4 Series
13 recalls · 17 complaints
One of the stronger 4-Series years, held back by brake complaints, weak parking alerts, and a long list of recalls worth checking by VIN.
2023 BMW 4 Series
26 recalls · 43 complaints
Last year of the second generation, with more recalls and complaints than 2022 or 2024, and a weaker showing than both neighbors.
2022 BMW 4 Series
18 recalls · 36 complaints
Rates stronger than the 2021 and 2023 years, though owners report sudden power loss and one recall tells owners to park outside.
2021 BMW 4 Series
40 recalls · 64 complaints
Mid-pack within the generation: better than the 2020 but behind the 2022, with electrical complaints and brake booster failures.
2020 BMW 4 Series
34 recalls · 66 complaints
Weakest of the nine scored 4-Series years, with a park-outside fire recall, coolant leaks and air bag complaints that set it apart.
2019 BMW 4 Series
17 recalls · 90 complaints
Air bag warnings, coolant leaks, and a park-outside fire recall mark this weaker-than-most year, which has 17 recalls on file.
2018 BMW 4 Series
21 recalls · 261 complaints
Weaker than most 4-Series years, with false airbag warnings from a failing seat sensor mat and coolant leaks that can bring overheating and limp mode.
Viewing a BMW 4 Series soon? Use a printable inspection checklist for its model year.
Found Your BMW 4 Series? Check Its History
Electrical system (1) problems come up most in BMW 4 Series owner complaints, and 182 recalls cover the years we track. A VIN check shows whether the car you found had its recall work done, plus accident and title history.
- Accidents
- Open Recalls
- Title History
- Odometer Rollback
BMW 4 Series Repair Costs
Reliability Rating
3/5
BMW 4 Series Years to Avoid
See which model years have the most problems
Most Reliable BMW Models
Compare all BMW models by reliability
Compare BMW 4 Series With Similar Coupes
The BMW 4 Series competes with other midsize coupes such as Mercedes-Benz C-Class, Toyota Supra, and Mercedes-Benz E-Class.
4 Series vs Mercedes-Benz C-Class
8 years tracked · 2186 complaints
4 Series vs Toyota Supra
7 years tracked · 41 complaints
4 Series vs Mercedes-Benz E-Class
8 years tracked · 469 complaints
4 Series vs BMW 5 Series
8 years tracked · 330 complaints
4 Series vs Chevrolet Camaro
6 years tracked · 168 complaints
Frequently Asked Questions
- What is the best year for the BMW 4-Series?
- The 2024 is the site's pick among years that have been on the road at least two years. The 2022 also rates well. The 2025 and 2026 show almost no complaints, but that mostly reflects less time on the road, so they are not proven yet.
- Is the BMW 4-Series reliable long term?
- Its standing is good, but it ranks well below average among coupes. The long-term worry is the cooling system. Owners report oil filter housing cracks around 53,000 miles that drain coolant fast, followed by overheating and limp mode.
- What are the most common BMW 4-Series problems?
- Owner complaints center on the electrical system, air bags, engine, and power train. Typical symptoms are flickering digital gauges, a passenger restraint warning, sudden coolant loss, and the engine stalling at stops or highway speed, sometimes with a Drivetrain Malfunction message.
- How much do BMW 4-Series repairs cost?
- Two repairs stand out in owner reports. A failed passenger seat occupancy sensor mat has been quoted at more than two thousand dollars. An oil filter housing repair has been quoted at almost 3,500 dollars. Owners say the low coolant warning comes on only when the tank is nearly empty.
- Do BMW 4-Series cars catch fire?
- Yes, fire reports exist. Owners describe engine-bay and underbody fires, and smoke from rear window defroster wiring behind the back seat. The 2018 and 2019 model years have the most fire reports in the data.
How we score the BMW 4 Series
Scores weight complaint severity at 35%, repair costs at 30%, recall impact at 20%, and the spread of complaints across systems at 15%, with complaint counts adjusted for US sales. Read the full methodology.
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