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: 24%

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 28 cars · 64% good X5 34 cars · 56% good 5 Series 27 cars · 52% good 3 Series 64 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.

You can be picky with a 4 Series because plenty of them land in excellent shape, but the engine is the real filter. Start under the hood: oil leaks hit half these cars and cooling issues a third, so seepage, coolant condition, and cooling-system faults come first. Then check tire wear and whether error codes are still live. Structural repairs are rare, so a respray is more about cosmetics than a wrecked chassis—use it to negotiate, not to flee. Walk if cooling is already failing or leaks are heavy; light oil seepage on an otherwise tight car is bargaining power.

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 Oct 1, 2026