Buyer Research

2020 BMW 5 Series — Should You Buy One?

Typical asking price: $22,000–$32,000. There is 1 high-severity known issue you need to know before handing over a check.

Deciding between model years? Compare the 15 BMW 5 Series years we've written up →

Kestrel Take

Fifteen complaints is one of the thinnest files we have on any 5 Series, and we will not dress that up: fifteen filings tells you that few owners wrote in, not that the car is sound. What is in there is unusually specific, though. Two owners describe the B58 six-cylinder's oil pump failing because of a plastic adjusting ring inside it — one at 38,000 miles, ending in a seizure — and say BMW now supplies a pump with metal parts. That is the same fault a 540i owner suspects on our 2019 page, described here in far more detail, and it is the one thing on this year we would spend money investigating before buying. NHTSA's campaign list for the 2020 came back empty when we pulled it while an owner in the file refers to an open recall on their own car, so run this VIN yourself rather than trusting our list or the seller's memory.

What we checked

Checked against public records, 2026-09-25

NHTSA holds 15 owner complaints for the 2020 BMW 5 Series, and 3 recall campaigns.

That is too small a record to read a pattern from, so we are not going to pretend otherwise — with numbers this low one owner moves the percentage by a lot. What has been filed is grouped under electrics and electronics (5), the engine (4), airbags (2). Treat those as things to look at, not as the vehicle's known weaknesses. A thin file usually means few of these were sold or few owners filed. It is not evidence the vehicle is trouble-free, and the issues below are our own research rather than a reading of this record.

3 recall campaigns cover this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2020 BMW 5 Series

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

B58 oil pump adjusting ring can fracture and starve the engineHigh — wallet impact

Two of the four engine filings are this, and both are detailed. The oil pump on the B58 six uses a plastic tensioning and adjusting ring that can become brittle and break; oil pressure collapses, and the car can lose drive in traffic or seize outright — one owner reports exactly that at 38,000 miles. Both say BMW has since released a pump with metal internals but is not proactively replacing the old ones. On a 540i or any six-cylinder car here, listen at warm idle with the bonnet up for a metallic rattle from the front of the engine, and treat a low oil pressure warning, ever, as a stop-driving event rather than a service reminder.

Repair cost (estimate): $1,600–$3,200 for the oil pump replaced; $12,000–$20,000 if the engine has already seized — around 74% of what this car is typically worth

Source: NHTSA complaints filed under the engine (4).

Starter fault warnings, a lost steering assist, and water in the door speakersMedium

Five electrical filings with nothing in common, so take them one at a time. A 530e owner got check engine and starter failure warnings and was told the parts did not exist to fix it. Another owner's car lost steering assistance and switched off while being driven, ending in a total loss, and they believed an open recall was involved. A third reports that G30 cars with the Bowers and Wilkins stereo drown their front door midrange speakers because the door drainage is poor — owners on the forums describe the same. Test every warning light, turn the wheel lock to lock at a standstill, and play something bass-heavy through the front doors listening for a crackle.

Repair cost (estimate): $300–$1,800 depending on whether it is a speaker, a starter or a steering module

Source: NHTSA complaints filed under electrics and electronics (5).

Passenger airbag found defective on diagnosisMedium

Only two airbag filings on this year, and one of them is the same owner's engine complaint filed under a second label — so this is really one report: a diagnostic found the passenger airbag itself defective and needing replacement. One report is not a pattern and we are not going to call it one. It is still worth thirty seconds of your time, because the check is free: turn the ignition on and watch the airbag light go out after its self-test rather than staying lit, and look at the passenger airbag status indicator with someone sitting in the seat.

Repair cost (estimate): $700–$1,800 for a passenger airbag module supplied and coded

Source: NHTSA complaints filed under airbags (2).

ZF eight-speed automatic sold as a lifetime fillMedium

Nothing in this year's record points at the gearbox, and we say that rather than letting a quiet file imply a strong one. The ZF eight-speed in these cars is a good unit, but BMW describes its fluid as filling for life, and independent specialists broadly disagree — degraded fluid shows up as harsh or hunting shifts and, left long enough, as mechatronic unit trouble. On the test drive, accelerate gently from a stop and then hard, and feel for a shift that thumps, slips or hunts between two gears. A fluid and filter service is the cheap end of this; the mechatronic unit is not.

Repair cost (estimate): $450–$800 for a fluid and filter service; $2,500–$4,500 for a mechatronic unit

Source: not yet checked against public records.

Walk-Away Red Flags

✗Metallic rattle from the front of the engine at warm idle
✗Oil pressure or oil level warning that has been 'live for a while'
✗Airbag light that stays on after the ignition self-test
✗Crackling or silent front door speakers on a car with the upgraded stereo
✗Gearbox that thumps or hunts between two gears under light throttle

Good Signs

✓This VIN checked on NHTSA's own recall lookup by you at the car
✓An invoice showing the oil pump replaced with the updated metal-internals part
✓Gearbox fluid and filter service recorded with an invoice despite the lifetime-fill claim
✓Airbag light extinguishing cleanly after its self-test, with the passenger indicator responding to weight
✓Oil service records at BMW's interval or shorter, from a dealer or marque specialist