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.

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 range: $700-$1,400

Electric water pump failureMedium

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

Repair cost range: $900-$1,600

Valve cover and oil pan gasket seepageMedium

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

Repair cost range: $500-$1,200

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 range: $300-$600

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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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.