Is the BMW 3-Series more reliable than the Mercedes-Benz CLA?

Yes, by a large gap. The 3-Series has 183 owner complaints, about 1.1 per 10,000 sold, while the CLA has 1,775, about 46 per 10,000. The BMW's main open issue is a starter recall, whereas CLA owners report stalls, fires, and transmission failures.

Which has more recalls, the 3-Series or the CLA?

The CLA has far more. Federal recall records list 606 recalls across seven CLA model years, compared with 45 across nine 3-Series model years. The 3-Series recall owners mention most is the starter campaign, which dealers often cannot complete because parts are unavailable.

What is the most common transmission problem on the Mercedes-Benz CLA?

Owners most often report the transmission slipping into neutral while driving, sometimes at 70 mph, so the car coasts until restarted. Others describe sudden slowdowns, harsh jerks, and rolling backward on hills. Dealers often cannot reproduce the fault, and 8 of the 117 power train complaints are crash-linked.

Which BMW 3-Series years should I avoid?

Avoid 2018 and 2020, the weakest years in the data. Whichever year you buy, ask whether the starter recall repair is finished, since owners say dealers lack parts. Motor mount failures, one at 52k miles on a certified pre-owned car, are another reason to get an inspection.

Are Mercedes-Benz CLA sunroofs a known problem?

Roof glass is the main structural complaint. Panoramic sunroofs crack or shatter at highway speed, and the roof panel ahead of the sunroof can come loose. Reports fall between about 25,600 and 53,000 miles, with one dealer quote above $10,000. Many of those filings name other Mercedes models, so the CLA share is unclear.

Last updated: 2026-10-10

BMW 3 Series vs Mercedes-Benz CLA: Reliability Compared

More Reliable

BMW 3 Series

Good

Mercedes-Benz CLA

Mixed

On reliability, the BMW 3-Series comes out well ahead of the Mercedes-Benz CLA. Owners filed far fewer complaints about the BMW relative to sales, and its recall count is a fraction of the CLA's. The CLA's stalls, transmission slips, and fires set the two apart.

How Do the BMW 3 Series and Mercedes-Benz CLA Generations Compare?

Most used cars you will see from either maker come from a late first generation or an early second generation. The first-generation CLA (C117) ran from 2013 through 2019 and received a facelift in 2017, so a 2018 car is a late C117. The second generation (C118) began in 2019, ran through 2023, and was facelifted in 2023. The BMW 3-Series moved from the F30 generation, sold from 2012 to 2019, to the G20 in 2019. The G20 was facelifted in 2022. A 2018 BMW is therefore a late F30, while 2020 through 2023 cars are G20 models. Cars from 2024 and later have a short complaint history, so weigh them carefully.

Verdict

The BMW 3 Series is more reliable than the Mercedes-Benz CLA, scoring 69/100 vs 48/100.

Reliability favors the BMW 3-Series by a large margin. Owners filed 183 complaints, about 1.1 per 10,000 sold, while CLA owners filed 1,775, about 46 per 10,000. Federal recall records tell the same story: 45 recalls across nine BMW model years against 606 across seven CLA years. The BMW's biggest headache is a starter recall with parts hard to find. The CLA's complaints include stalls, a transmission that slips into neutral at speed, and cracking sunroof glass.

Key Differences

1BMW 3 Series has 561 fewer total recalls
2BMW 3 Series has 44.9 fewer complaints per 10k sold
3BMW 3 Series scores 21 points higher in reliability

Category Scoreboard

3BMW 3 Series

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0Mercedes-Benz CLA

Reliability ScoreTotal RecallsComplaint Rate

BMW 3 Series vs Mercedes-Benz CLA: Which Is More Reliable?

BMW 3 Series vs Mercedes-Benz CLA at-a-glance reliability comparison
Metric	BMW 3 Series	Mercedes-Benz CLA
Reliability Score	69/100	48/100
Years Tracked	9	7
Total Recalls	45	606
Complaints per 10k Sold	1.1	46
Year Wins	7	0

What Are the Common Problems With the BMW 3 Series and Mercedes-Benz CLA?

Starter trouble defines the BMW's list: a recall dealers often cannot finish for lack of parts, plus early motor mount failures, restraint warnings, and a diesel 328d fuel system recall. The CLA's reports are more varied and more alarming: stalls at highway speed, fires, piston and cylinder head failures, and the transmission dropping into neutral at 70 mph. Steering is a CLA problem area with 8 crash-linked reports, and the BMW list has no steering category. The BMW does carry 5 crash-linked air bag complaints, and the CLA list has no air bag category.

BMW 3 Series vs Mercedes-Benz CLA common problem areas comparison
Component	BMW 3 Series	Mercedes-Benz CLA
ELECTRICAL SYSTEM	0.2Very Low	6.2Average
ENGINE	0.2Very Low	4.5Average
UNKNOWN OR OTHER	0.2Very Low	4.1Average
POWER TRAIN	0.1Very Low	3Low
STEERING	—None	2.2Low
STRUCTURE	—None	1.4Low
AIR BAGS	0.1Very Low	1Very Low
FUEL SYSTEM	—None	1Very Low
SERVICE BRAKES	—None	0.9Very Low
VEHICLE SPEED CONTROL	—None	0.9Very Low
TIRES	—None	0.6Very Low
WHEELS	—None	0.6Very Low
FORWARD COLLISION AVOIDANCE	—None	0.4Very Low
VISIBILITY	—None	0.3Very Low
BACK OVER PREVENTION	—None	0.2Very Low
SUSPENSION	—None	0.2Very Low
SEAT BELTS	—None	0.1Very Low
SEATS	—None	0.1Very Low
FUEL/PROPULSION SYSTEM	—None	—None
EXTERIOR LIGHTING	—None	—None

Complaints per 10,000 units sold, aggregated across all tracked model years from NHTSA owner reports.

How Does BMW 3 Series vs Mercedes-Benz CLA Reliability Compare by Year?

BMW 3 Series vs Mercedes-Benz CLA year-by-year reliability scores
Year	BMW 3 Series	Mercedes-Benz CLA	Edge
2026	76/1000R / 0C	64/1000R / 0C	BMW 3 Series
2024	71/1002R / 8C	44/1008R / 23C	BMW 3 Series
2022	70/1003R / 6C	38/10076R / 272C	BMW 3 Series
2021	67/1009R / 22C	45/100149R / 318C	BMW 3 Series
2020	64/10012R / 45C	56/10062R / 110C	BMW 3 Series
2019	66/1009R / 34C	44/100196R / 523C	BMW 3 Series
2018	65/1005R / 58C	46/100115R / 529C	BMW 3 Series

Best years to cross-shop: The 2024 BMW 3 Series scored 71/100 and the 2020 Mercedes-Benz CLA scored 56/100 — the strongest shared model years that have been on the road for at least two years, where available.

Who Should Buy the BMW 3 Series vs the Mercedes-Benz CLA?

Pick the BMW 3-Series if you want the lower risk of a breakdown. Its owner complaints are far fewer, and its repair cost data shows about one unscheduled shop visit a year. Skip 2018 and 2020, the weakest years, and ask any seller whether the starter recall repair has been done, since parts have been scarce. If you have a diesel 328d in mind, check the fuel system recall status first. Consider the CLA only if its styling or price matters more to you than a quieter ownership experience, and then shop carefully. The strongest years in the data are 2020 and 2026, but the 2026 car has had little time to collect complaints, so treat that as weak evidence. Avoid 2022 and 2024. Have a mechanic check for crankcase ventilation codes, listen for transmission hesitation on a highway test drive, and look at the panoramic sunroof. Confirm every open recall is closed before you buy.

BMW 3 Series vs Mercedes-Benz CLA: Common Questions

Is the BMW 3-Series more reliable than the Mercedes-Benz CLA?: Yes, by a large gap. The 3-Series has 183 owner complaints, about 1.1 per 10,000 sold, while the CLA has 1,775, about 46 per 10,000. The BMW's main open issue is a starter recall, whereas CLA owners report stalls, fires, and transmission failures.
Which has more recalls, the 3-Series or the CLA?: The CLA has far more. Federal recall records list 606 recalls across seven CLA model years, compared with 45 across nine 3-Series model years. The 3-Series recall owners mention most is the starter campaign, which dealers often cannot complete because parts are unavailable.
What is the most common transmission problem on the Mercedes-Benz CLA?: Owners most often report the transmission slipping into neutral while driving, sometimes at 70 mph, so the car coasts until restarted. Others describe sudden slowdowns, harsh jerks, and rolling backward on hills. Dealers often cannot reproduce the fault, and 8 of the 117 power train complaints are crash-linked.
Which BMW 3-Series years should I avoid?: Avoid 2018 and 2020, the weakest years in the data. Whichever year you buy, ask whether the starter recall repair is finished, since owners say dealers lack parts. Motor mount failures, one at 52k miles on a certified pre-owned car, are another reason to get an inspection.
Are Mercedes-Benz CLA sunroofs a known problem?: Roof glass is the main structural complaint. Panoramic sunroofs crack or shatter at highway speed, and the roof panel ahead of the sunroof can come loose. Reports fall between about 25,600 and 53,000 miles, with one dealer quote above $10,000. Many of those filings name other Mercedes models, so the CLA share is unclear.

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Decided between BMW 3 Series and Mercedes-Benz CLA? Run a VIN check before you buy — uncover hidden accidents, title issues, and open recalls.

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How we score the BMW 3 Series and Mercedes-Benz CLA

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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