Buyer Research

2016 BMW 340i (B58) — Should You Buy One?

Typical asking price: $20,000–$30,000. This is one of the more reliable vehicles in its class — here's what to watch for anyway.

Kestrel Take

The B58 inline-six is the engine that restored BMW's reputation — closed-deck block, robust chain, and a reputation for taking abuse. This is the modern BMW to buy used. The failure points that remain are gaskets and cooling components, not catastrophes.

What we checked

No public record to reconcile against

We don't yet have a public record to check this one against. Federal complaint records thin out badly on older vehicles, so there is little to check against. What follows is our own write-up, and it has not been reconciled against an official record. Treat it as a starting point, not a verdict.

Known Issues for the 2016 BMW 340i (B58)

Ranked by wallet impact. These are documented, recurring problems — not freak accidents.

Oil filter housing gasket leakMedium

The recurring BMW oil leak. Oil onto the belt and the front of the engine. Routine at 70k-100k miles.

Repair cost (estimate): $700-$1,400

Source: not yet checked against public records.

Electric water pump failureMedium

Fails without warning and the car overheats fast. Preventive replacement around 90k miles is the norm.

Repair cost (estimate): $900-$1,600

Source: not yet checked against public records.

Valve cover and oil pan gasket seepageMedium

Standard German-car gasket aging. Not urgent, but it adds up.

Repair cost (estimate): $500-$1,200

Source: not yet checked against public records.

Charge pipe failure on tuned carsMedium

The plastic charge pipe splits under elevated boost. Cheap to fix, and a reliable indicator that the car has been tuned.

Repair cost (estimate): $300-$600

Source: not yet checked against public records.

Walk-Away Red Flags

✗Evidence of a tune — check for a JB4 or a flashed DME
✗Oil leaks left unaddressed
✗Overheating history
✗Run-flat tires replaced with mismatched brands

Good Signs

✓Stock tune with a BMW dealer or specialist service history
✓Water pump and oil filter housing gasket already done
✓M Sport suspension without a coilover conversion

Found a specific BMW 340i (B58)?

This page covers what goes wrong on the 2016 BMW 340i (B58) in general. The Kestrel report covers this specific car— the asking price vs. market, the photos, the seller's description, and a BUY / NEGOTIATE / WALK AWAY verdict with a negotiation script.

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Not ready to pay for one? The free read is instant and needs no card — it checks the asking price against the market and names the top issues for this year. It stops short of the verdict, because that needs the photos.

Known issues on this page are based on documented owner reports, NHTSA complaints, class-action records, and manufacturer technical service bulletins. Individual vehicles vary. A pre-purchase inspection by a trusted mechanic is always worth doing.