BMW 7 Series: common faults & what to check

Which BMW 7 Series are you looking at?

4 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Engine not documented

4 variants documented

2001–2009E652001–2009E65Engine not documented for this generationEngine not documentedDocumented issues0 knownSee faults & what to checkPhoto: IFCAR via Wikimedia Commons, Public domain.

2008–2016F012008–2016F01Engine not documented for this generationEngine not documentedDocumented issues9 knownSee faults & what to checkPhoto: Ethan Llamas via Wikimedia Commons, CC BY-SA 4.0.

2015–2022G112015–2022G11Engine not documented for this generationEngine not documentedDocumented issues9 knownSee faults & what to checkPhoto: Chanokchon via Wikimedia Commons, CC BY-SA 4.0.

2022–nowG702022–nowG70Engine not documented for this generationEngine not documentedDocumented issues6 knownSee faults & what to checkPhoto: Chanokchon via Wikimedia Commons, CC BY-SA 4.0.

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Start your free check on this BMW 7 Series

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

The checks worth doing on a BMW 7 Series before you hand over any money. Every documented fault is listed below, each with its own page.

• Serious issue

  Cold-start the engine and listen carefully for chain rattle from the rear — this is the most reliable diagnostic indicator on a cold morning.

  See why

  N57/B57 Diesel Rear Timing Chain Failure

  Both the N57 (F01/F02, 2008-2015) and B57 (G11/G12, 2015-2022) 3.0-litre straight-six diesels are documented for rear timing chain failure. The chain is driven from the rear of the engine (transmission-end), requiring engine or transmission removal for access, making this a disproportionately expensive repair. Failure is driven by chain stretch from cold-start oil starvation in engines run on extended drain intervals, combined with tensioner wear. A characteristic cold-start chain rattle that disappears once oil pressure builds is the primary warning.

  What you would notice

  • Cold-start timing chain rattle from rear of engine (disappears after 30-60 seconds as oil pressure builds)
  • Rough running or misfires during cold warm-up phase
  • Check engine light with camshaft/crankshaft timing correlation codes (P0016/P0017 range)
  • Engine judder under load at low rpm
  • In severe cases: catastrophic engine damage if chain jumps or snaps

  Typically $4,500–$12,000 to put right.

• Serious issue

  Inspect ride height visually at all four corners — any low corner indicates a failed strut.

  See why

  Air Suspension Strut Bladder Failure and Compressor Burn-Out

  The F01/F02 and G11/G12 7 Series use four-corner air suspension (Electronic Damper Control) as standard. Air spring bladders degrade from ozone, UV exposure, and heat cycling — F01s are now 10-18 years old in the NZ/AU market, making strut failure essentially expected. The air compressor overworks to compensate for leaking struts and burns out. Single-strut failures are common, but compressor burn-out often follows shortly if the leaking strut is not addressed first. A failed air suspension defaults to bump-stop ride height and is a fail-WOF condition in NZ. Conversion to passive coilovers is a common but handling-compromising workaround.

  What you would notice

  • Vehicle sitting lower than normal on one corner or overall
  • Raise Vehicle or suspension fault warning on iDrive display
  • Visible lean or uneven ride height when parked on flat ground
  • Air compressor audible cycling repeatedly after startup
  • Harsh ride with no damping adjustment response

  Typically $1,200–$7,500 to put right.

• Costly issue

  Perform a cold start with the engine fully cold-soaked for at least 4 hours.

  See why

  N63 V8 Valve Stem Seal Failure Blue Smoke Cold Start

  The N63 4.4-litre twin-turbocharged V8 is extensively documented for valve stem seal degradation. The seals harden and crack from heat cycling in the hot-vee engine layout, allowing oil to migrate past the valve stems into combustion chambers during the engine-off heat-soak period. On next cold start the pooled oil burns off producing visible blue-grey smoke from the exhaust for 10-60 seconds. BMW acknowledged the defect through the N63 Customer Care Package in the United States, extending coverage for valve stem seal replacement. The repair requires cylinder head removal or specialised in-situ tooling and is highly labour intensive. Oil consumption typically increases progressively as the condition worsens.

  What you would notice

  • Blue or blue-grey smoke from the exhaust on cold start, clearing after 20-60 seconds
  • Gradual oil consumption between services with no external leak visible
  • Oil fouling or dark oily deposits on spark plugs confirmed on removal
  • Smoke visible after extended hot soak and subsequent restart

  Typically $4,000–$10,000 to put right.

• Costly issue

  Check oil level relative to last service date — any consumption over 0.5L/1000km is a red flag.

  See why

  N63/N63B V8 Excessive Oil Consumption

  The twin-turbocharged N63 (F01/F02, 2008-2015) and updated N63B (G11/G12, 2015-present) V8s are documented for abnormally high oil consumption, typically 1-2 litres per 1,000 km under normal use. Heat-soak from the centrally-mounted turbos (valley-mounted between cylinder banks) causes oil to carbonise on intake valves and pass the piston rings and valve stem seals during hot restarts. BMW issued a Customer Care Programme in Australia covering valve stem seals, valve cover gaskets, PCV system, oil separator, and ECU reflash, explicitly acknowledging the defect. Without remediation, catalytic converters and oxygen sensors suffer secondary damage from oil burning.

  What you would notice

  • Oil level drops 1-2L between 1,000 km service intervals
  • Blue smoke from exhaust on cold start or hard acceleration
  • Fouled or oil-contaminated spark plugs
  • Catalytic converter damage or P0420/P0430 fault codes
  • Oil consumption warning light activating frequently

  Typically $2,800–$8,500 to put right.

• Costly issue

  Park on level ground and compare all four corner heights.

  See why

  Front Air Suspension Strut Failure Causing Nose Drop

  Both the F01 and G11 7 Series use front air suspension struts as standard. The air bellow rubber sleeve degrades from ozone exposure, heat cycling, and UV hardening, leading to cracking and progressive air loss. A failed strut causes the front corner to slowly or suddenly drop, triggering ride height warnings on the iDrive display. Failure can be gradual with the nose dropping overnight or sudden with immediate nose drop while driving. The air compressor may run continuously trying to maintain height, accelerating its own premature failure. The electronic height sensors can also fail independently producing false warnings.

  What you would notice

  • Nose drops overnight or after the car sits for several hours
  • Vehicle sitting noticeably lower at one front corner when parked
  • Ride height warning on iDrive with SPORT or LOW indicator
  • Air compressor audible cycling frequently while car is stationary
  • Harsh low-speed ride from a deflated or exhausted strut

  Typically $2,500–$6,000 to put right.

• Costly issue

  Start the engine fully cold-soaked overnight and listen immediately for a metallic rattle from the engine top-front.

  See why

  N57 3.0D Timing Chain Tensioner Cold Rattle

  The N57 diesel timing chain tensioner loses hydraulic pressure during prolonged cold soak. On cold start the chain slaps against plastic guides producing a metallic rattle that typically clears within 5-15 seconds once oil pressure builds. Repeated events accelerate guide wear and can progress to chain stretch, jumped timing, or catastrophic engine damage if ignored. This is a documented pre-facelift and facelift N57 weakness.

  What you would notice

  • Metallic rattling or chattering from the top of the engine immediately on cold start
  • Rattle clears within 5-20 seconds after oil pressure builds
  • BMW engine malfunction or drivetrain warning in severe cases
  • Rough idle briefly at cold start before settling

  Typically $2,800–$5,500 to put right.

BMW 7 Series service schedule

What falls due, and at what distance, for each generation of the BMW 7 Series. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

What these repairs cost on other cars

Some of the BMW 7 Series’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

• Timing Chain Replacement Cost

Other BMW models