BMW 4 Series: common problems & condition

Cars inspectedreal pre-purchase inspections

75/100

Average conditionall cars we check: 61/100

80%

In good shape (60+)all cars we check: 56%

Across 30 used BMW 4 Seriess we inspected, this model scores noticeably better than the typical used car we inspect — average condition 75/100 vs 61 for all cars we check. Every number on this page comes from real pre-purchase inspections — cars people were about to buy and paid an independent inspector to go through point by point, engine to underbody, paint depth to error codes. Not owner surveys, not warranty statistics, not forum lore: what we actually found.

Most common faults

Oil leaks · Engine

50%

Low coolant / cooling system issues · Engine

33%

Tires condition & wear · Brakes and tires

27%

Active error codes · Electronic equipment

20%

Leaking or worn shock absorbers · Suspension

13%

Share of inspected BMW 4 Seriess where each item was flagged.

How they score

Excellent 57% Good 23% Mediocre 10% Poor 10%

Hidden history

What the seller might not mention — how often we find it on this model.

73%had a repainted or replaced panelall cars: 75%

3%showed structural repairall cars: 4%

17%had fault codes recently clearedall cars: 23%

Good cars by mileage

Share of BMW 4 Seriess in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; rolled-back odometers excluded from the mileage curve). The dashed grey curve is all cars we check.

What else does ~$31k buy? A used BMW 4 Series typically sells for around $31,351 — compare the odds of getting a good car across every make at that budget. Compare →

X3 26 cars · 69% good X5 31 cars · 51% good 3 Series 64 cars · 50% good 5 Series 26 cars · 50% good

Other BMW models we've inspected — or see the full BMW profile.

Straight from recent BMW 4 Series reports

2019 BMW 4 Series · 95k mi — flagged: low coolant / cooling system issues, oil leaks, abnormal noise. Inspected Jul 31.

2017 BMW 4 Series · 87k mi — flagged: exhaust system, digital engine electronics / engine control module, front electronic module. Inspected Jun 6.

The 4 Series comes across as a solid used buy if you treat the engine as the make-or-break item. Oil leaks show up on half of them and cooling problems on a third, so start every look-over by checking for seepage around the motor and verifying the coolant system is tight and not overheating. Tires and a few error codes are common enough to use as bargaining chips, but walk if the leaks are heavy or the cooling is already compromised. The usual panel resprays are just typical used-car wear, not a red flag by themselves.

Is the BMW 4 Series reliable?

80% of the 30 we inspected scored 60/100 or higher, with an average of 75/100 — it scores noticeably better than the typical used car we inspect.

What are the most common problems on a used BMW 4 Series?

The items we flag most often are oil leaks (50%), low coolant / cooling system issues (33%), tires condition & wear (27%). Have these checked before buying.

Should I worry about cleared fault codes?

On 17% of these cars the ECU codes had been erased shortly before sale, which can hide active faults. Ask for a diagnostic scan and start the engine from cold.

Thinking of buying a BMW 4 Series? Get the exact car inspected before you pay.

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Based on 30 inspections · updated Aug 22, 2026