The F01 750i was BMW's V8 flagship from 2008 to 2015, pairing the 4.4-litre twin-turbo N63 with the ZF 8HP automatic, air suspension, and a cabin packed with technology. Pre-LCI models (2009-2012) use the original N63 with a well-documented history of oil consumption, coolant leaks, and injector failures that led to a class-action settlement. The LCI (2012-2015) received the significantly improved N63TU with Valvetronic, forged internals, and revised valve stem seals. Heavy depreciation makes these accessible at a fraction of their original price, but V8 complexity and flagship electronics keep ownership costs firmly in premium territory.· more· less
Strong performance, refined V8Exceptional comfort and equipment
N63 pre-LCI is notably unreliableAir suspension and electronics are costly
Buy if: You want V8 flagship luxury at a fraction of its original price and can find a well-documented LCI (2012+) example with complete service history and verified recall completion.
Avoid if: You cannot absorb surprise repair bills in the €2,000-5,000 range, or you are considering a pre-LCI (2009-2012) model without verified Customer Care Package completion.
Hot-V layout bakes valve stem seals, causing excessive oil consumption and blue exhaust smoke · more· less
The N63's hot-vee design places turbochargers and exhaust manifolds between the cylinder banks, subjecting valve stem seals to extreme heat. As the seals harden and crack, oil seeps past them into the combustion chambers. Symptoms include blue exhaust smoke on startup, oil consumption exceeding 1 litre per 1,500 km, and fouled spark plugs. BMW acknowledged this as a widespread problem, ultimately losing a class-action lawsuit and creating the N63 Customer Care Package. Pre-LCI models (2009-2012) are most affected, with approximately 20-30% of owners reporting significant oil consumption. The repair requires replacing all 32 valve stem seals. Some specialists can perform the repair without removing the cylinder heads (in-situ method, approximately €3,000-4,000), while a full head-off repair runs €4,500-6,000 at a specialist. Dealers quote €5,000-7,000. The LCI's N63TU (2012+) has revised seals and improved crankcase ventilation, making this issue less common but not eliminated on higher-mileage examples.
Turbocharger coolant line leak
up to €3,5002 of 8
Rubber sections of turbo coolant lines degrade from extreme valley heat, causing coolant loss · more· less
The turbocharger coolant supply and return lines run through the engine valley where temperatures routinely exceed 500 degrees C near the turbine housings. The rubber sections of these lines harden, crack, and leak over time. This is one of the most commonly reported issues across all N63-equipped vehicles. Symptoms include low coolant warnings, visible coolant residue in the engine valley, steam from under the bonnet, and overheating if ignored. BMW issued a service campaign to replace the lines with more heat-resistant versions, but the problem can recur. Dealer repair costs €2,500-3,500 due to extensive labor accessing the engine valley. Independent specialists can often replace the affected rubber sections for €1,500-2,000. Aftermarket hose kits cost under €100 for parts, but professional installation is strongly recommended. Most failures occur between 60,000 and 120,000 km. Ignoring a coolant leak risks overheating and potential head gasket damage.
Air suspension strut or compressor failure
up to €4,0003 of 8
Air spring bladders develop leaks from rubber degradation, eventually overworking the compressor · more· less
The F01 uses adaptive air suspension on all four corners as standard. The rubber air spring bladders degrade from temperature cycling and aging, typically beginning to fail between 100,000 and 160,000 km. Symptoms include one corner sagging overnight, the compressor running constantly at startup, or a suspension warning on the dashboard. Aftermarket air struts from Arnott or Bilstein cost approximately €250-400 per corner, while OEM units are €600-900 each. Specialists recommend replacing struts in pairs. If the compressor fails from overwork due to a leaking strut, add €300-600 for aftermarket or €600-900 for OEM. A full suspension refresh (four struts plus compressor) can reach €2,500-4,000 at a specialist. The F01 system is more reliable than the E65's, but remains one of the most common expensive repairs on this generation.
Timing chain stretch and guide rail wear
up to €7,0004 of 8
Timing chain stretches and plastic guide rails wear, causing cold-start rattle and risking engine damage · more· less
The N63 V8 uses multiple timing chains with plastic guide rails that can wear prematurely, particularly on early models (2009-2012). Chain stretch and guide wear cause a distinctive rattle on cold start, typically appearing between 80,000 and 130,000 km. BMW addressed this with improved components in the N63TU. On the original N63, the repair is labor-intensive because the chains are located at the rear of the engine (between engine and transmission), often requiring the engine or transmission to be separated. Parts cost €500-800 for a complete chain kit, but labor dominates the bill at 16-24 hours. Total cost at an independent specialist runs €3,000-5,000, while dealers quote €5,000-7,000. If the chain jumps timing, it can cause catastrophic valve-piston contact. A cold-start rattle lasting more than a few seconds should be treated as urgent.
Fuel injector failure
up to €3,5005 of 8
Piezoelectric direct injectors fail prematurely, causing misfires and rough running · more· less
The N63 uses piezoelectric direct fuel injectors that were notoriously unreliable on early models. Failures were reported as early as 30,000-50,000 km, with misfires, rough idle, difficult hot starts, and black exhaust residue on one bank being typical symptoms. BMW distinguished injector designs by index number, with anything below index 11 being significantly more failure-prone. BMW eventually extended the injector warranty to 10 years / 190,000 km on N63-equipped vehicles. A single OEM injector costs €250-400, with all 8 replacement running €2,500-3,500 including labor. The N63TU (2012+) received improved injectors with a much lower failure rate. On any pre-LCI car, verify which injector index is installed and whether replacements have been done.
Valve cover gasket and PCV failure
up to €2,5006 of 8
Valve cover gaskets fail and integrated PCV diaphragm tears, causing oil leaks onto hot turbo components · more· less
The N63 has metal valve covers with an integrated Positive Crankcase Ventilation (PCV) system. The gaskets harden from heat exposure and the PCV diaphragm inside the cover eventually tears. When the gasket fails, oil drips directly onto the turbocharger housings in the engine valley, creating a burning oil smell and smoke. Because the PCV is integrated, the entire valve cover assembly must be replaced rather than just the gasket. Each cover costs €250-400 for OEM parts. Both sides should be replaced simultaneously to save on labor. Specialists recommend budgeting around €1,200-1,500 for an independent shop to replace both covers with gaskets. BMW dealers quote €2,000-2,500. This is an almost universal issue on N63 engines over 80,000 km.
Electrical module and battery drain issues
up to €1,5007 of 8
High parasitic draw from multiple electronic modules causes battery discharge within days if car sits unused · more· less
The F01 contains over 70 electronic control units and the N63 runs its cooling fan and coolant pump after engine shutoff, drawing significant power. BMW increased the battery to 105 Ah to compensate, and a service bulletin recommends preventive battery replacement at every oil change interval. Comfort Access door handle modules are a known source of parasitic draw when they malfunction. Symptoms include a dead battery after 3-5 days of non-use, dashboard warnings about battery discharge, and intermittent iDrive or comfort feature failures. A new AGM battery with proper registration costs €250-400. Comfort Access module replacement runs €300-500 per handle. More complex faults involving the FRM (Footwell Module) or junction box can reach €800-1,500 at a specialist. A quality trickle charger is essential for any F01 that is not driven daily.
Electric water pump and thermostat failure
up to €1,5008 of 8
Electric water pump fails typically between 80,000-120,000 km, causing overheating risk · more· less
The N63 uses an electric water pump that is prone to failure, typically between 80,000 and 120,000 km. Symptoms include coolant temperature warnings, fluctuating gauge readings, and poor cabin heating. BMW recalled certain 2012-2018 models (recall 18V-248) because the auxiliary water pump's electrical connector could short-circuit and potentially overheat. The main water pump costs €300-500 for the part, with the thermostat housing adding €100-200. Labor runs €400-600 at an independent specialist due to the V8's tight packaging. Replacing both water pump and thermostat together is recommended when either fails, totaling €800-1,500 depending on shop rates. A failed water pump can lead to rapid overheating and potential head gasket damage if the warning is ignored.
High-risk V8 that demands careful maintenance and a healthy repair budget
The original N63 (2009-2012) is one of BMW's most problematic modern engines, with oil consumption, coolant leaks, injector failures, and timing chain issues all well-documented. The N63TU in the LCI (2012-2015) addressed many of these weaknesses with forged internals, revised seals, and improved cooling, but it is not immune. Air suspension and complex electronics are shared concerns across all F01 models. A well-maintained LCI example with complete service history is a substantially safer purchase than a pre-LCI car. Budget generously for maintenance and keep a repair reserve.
Service history
Complete BMW dealer or specialist records essential. Verify oil change intervals (10,000 km or annually, not the standard 15,000 km long-life interval).
Cold start
Start engine completely cold. Listen for timing chain rattle in the first 30 seconds and watch for blue exhaust smoke indicating valve stem seal wear.
Test drive
Drive for at least 30 minutes including varied speeds. Monitor oil temperature, coolant temperature, and watch for any warning lights.
Oil level check
Check the iDrive oil level display. If oil is low or at minimum, likely oil consumption issue. Ask the seller about top-up frequency.
Specific for this vehicle
Check for blue exhaust smoke on startup and under load
Blue smoke indicates failed valve stem seals. Rev the engine after idling for a minute. The most critical check on any N63.
Inspect engine valley for coolant residue
Look between the cylinder banks for white or green coolant stains. Turbo coolant line leaks are extremely common and expensive to repair.
Test air suspension at all four corners
Park overnight and check if the car sits level in the morning. Listen for the compressor running on startup. Any sagging corner indicates a leaking air spring.
+ 5 more checksShow less
Verify BMW Customer Care Package completion (pre-LCI)
For 2009-2012 models, confirm with BMW using the VIN that the N63 Customer Care Package has been fully performed.
Check fuel injector index number
On pre-LCI cars, verify that injectors have been updated to index 11 or 12. Earlier index injectors are significantly more failure-prone.
Check for oil leaks around valve covers
Look for oil residue on the turbo housings and in the engine valley. Valve cover gasket failure is nearly universal on higher-mileage N63 engines.
Verify auxiliary water pump recall (18V-248) completed
For 2012-2015 models, confirm with BMW that the auxiliary water pump recall has been addressed to eliminate fire risk.
Test all electronics thoroughly
Check iDrive, all seat functions, Comfort Access, soft-close doors, night vision (if equipped), and ambient lighting. Electronics failures are common and repair costs add up.
Recalls and Technical Service Bulletins
Electronic auxiliary water pump fire risk (2012-2015 production)Critical - verify completed
N63 fuel injector limited warranty extension (10 years / 190,000 km)Verify if applicable
Contact BMW with the VIN to verify all recalls and service campaigns have been completed. The Customer Care Package and auxiliary water pump recall are particularly important. The fuel injector warranty extension may still apply to lower-mileage LCI examples.
Warranty Status
Factory warranty (2 years)Expired on all F01 models
N63 injector extended warranty10 years / 190,000 km from first registration (check eligibility)
Rust perforation warranty (12 years)Expired or expiring on most F01 models
All F01 750i models are outside their original factory warranty. The N63 fuel injector warranty extension to 10 years may still apply to some late-production (2014-2015) LCI cars with low mileage. Verify eligibility with BMW using the VIN. Third-party extended warranties are available but often exclude known N63 issues.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
