BMW X5 M F85
Weaknesses, engine ratings and buying advice
The X5 M F85 (2015–2018) has the revised S63B44 (TU) — 567 hp, 553 lb-ft. Faster and more refined than the E70, same Hot-V architecture.
Weaknesses: Wastegate rattle is the signature of the S63TU — sounds like coins in the exhaust on throttle lift (prob=4). Repair kits from $110. Valve stem seals as on the E70 ($3,300–$6,600). Turbo coolant lines still plastic ($330–$2,200). Transfer case failure ($2,200–$7,700). Flex disc (guibo) tears under load — increased risk with track use. Adaptive dampers wear.
2026 market: From $38,500–$60,500.
Insider pick: X5 M F85 with documented valve stem seal service — that's the most expensive ticking clock.
575 PS
X5 M · Benzin
M SUV second generation — 575 hp, 2.3 tonnes
Fun to Drive!449 PS
4.4L V8 Biturbo Benzin
8 weaknesses
Good ChoiceGenerations
Engine Overview
The BMW X5 M F85 is available with one engine variant at 197 hp.
BMW's first turbo V8 in the M5 — the crossflow exhaust routing between the cylinder banks (hot-V) produces an atypical V8 sound: less primitive burble than the S62 naturally aspirated, more muted growl with turbo whistle in the background. What the S63 loses in character it gains in torque — 680 Nm available from 1,500 rpm, pushing consistently to above 5,000 rpm. The Achilles heel is the con rod bearings: metal swarf in the oil filter on an oil change is the earliest warning sign. Preventive bearing replacement every 80,000–100,000 km is strongly recommended, costing €4,000–6,000. Oil cooler seals weep from 60,000 km; turbocharger oil supply lines coke up with Longlife intervals. Shorten oil changes to 8,000 km and have the bearings done and the result is a robust engine.
- !! Connecting rod bearing wear from 120,000 km
Connecting rod bearing shells wear through high revs and turbo boost pressure. Metal particles in the oil filter are the earliest warning sign. Preventive replacement every 80,000–100,000 km for around €2,390 is recommended — compared to €30,000–€50,000 for a replacement engine.
Symptoms: Knocking or hammering engine noises under load and at idle, metal particles in the oil filter or sump, oil pressure warning light, engine no longer revs freely - !! Recall: oil pump drive shaft
Manufacturing tolerance fault on the oil pump drive shaft. The shaft can separate from the rotor, causing immediate total oil pressure loss. Affects approximately 696 US vehicles, produced July–September 2012. NHTSA Recall 12V475000.
- !! Turbo coolant lines brittle from 110,000 km
The rubber lines and plastic T-connectors of the turbo cooling circuit become brittle through permanent radiant heat in the V-valley. Typically first seen from around 100,000 km. A repair kit with silicone hoses and brass T-pieces is the permanent solution.
Symptoms: Dropping coolant level without visible external leak, gurgling after switching off the engine, rising engine temperature, coolant steam from engine bay
+ 6 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| M Performance Brakes: High Wear The M Performance braking system on the F85 X5 M wears above-average quickly due to high vehicle weight and engine output. Pads and discs need regular inspection. Symptoms: Brake squeal in cold conditions, disc scoring, heavy brake dust on wheels from 35,000 km | High |
Top Reported Issues
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Known Problems and Issues +
A total of 56 weaknesses have been documented for the BMW X5 M F85 (2014–2018) — 49 engine-related and 7 vehicle-related. Typical issues affect Brakes, Suspension, Gearbox, Cooling. Considered reliable: N63B44TU (4.4L V8 Biturbo).
X5 M (S63B44, 2014–2018) — Be Careful: Connecting rod bearing wear, Recall: oil pump drive shaft, Turbo coolant lines brittle. Power: 575 PS.
What to watch out for with the BMW X5 M? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the BMW X5 M F85 have? +
What should I look for when buying a used BMW X5 M F85? +
Which engine is recommended? +
Which BMW X5 M F85 engine is the most reliable? +
Which BMW X5 M F85 engine is the most fun? +
Is the BMW X5 M F85 worth buying used? +
What horsepower variants are available for the BMW X5 M F85? +
Last updated: February 2026 · All information without guarantee