BMW 4 Series: common problems & condition

Cars inspectedreal pre-purchase inspections

73/100

Average conditionall cars we check: 60/100

79%

In good shape (60+)all cars we check: 52%

Across 29 used BMW 4 Seriess we inspected, this model scores noticeably better than the typical used car we inspect — average condition 73/100 vs 60 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

48%

Low coolant / cooling system issues · Engine

31%

Tires condition & wear · Brakes and tires

28%

Active error codes · Electronic equipment

21%

Worn brake rotors · Brakes and tires

14%

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

How they score

Excellent 45% Good 34% Mediocre 17% Poor 3%

Hidden history

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

72%had a repainted or replaced panelall cars: 76%

3%showed structural repairall cars: 4%

17%had fault codes recently clearedall cars: 23%

What else does ~$32k buy? A used BMW 4 Series typically sells for around $32,100 — compare the odds of getting a good car across every make at that budget. Compare →

X5 31 cars · 61% good 3 Series 62 cars · 45% good 5 Series 25 cars · 44% good

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

Straight from recent BMW 4 Series reports

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

2015 BMW 4 Series · 41k mi — flagged: oil leaks, tires condition & wear. Inspected May 25.

Is the BMW 4 Series reliable?

79% of the 29 we inspected scored 60/100 or higher, with an average of 73/100 — 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 (48%), low coolant / cooling system issues (31%), tires condition & wear (28%). 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.

Book an inspection

Based on 29 inspections · updated Jul 12, 2026