Are BMW 6 Series Reliable? The Complete Reliability Guide

The BMW 6 Series is an executive grand tourer coupe that delivers powerful performance and luxurious driving. But are these coveted BMW models actually reliable for the long haul?

In short, BMW 6 Series have average to below average reliability compared to other luxury brands. Models before 2010 had quite a few issues, while more recent years have improved. But problems still occur, especially as mileage increases.

In this comprehensive reliability guide, we’ll look at:

Expert reviews of 6 Series reliability by model year
Common problems and repair costs
Maintenance costs and longevity compared to rivals
Tips to improve reliability of your 6 Series

After reading, you’ll have a detailed understanding of the reliability of BMW 6 Series to help make an informed buying decision.

BMW 6 Series Overview

The 6 Series represents BMW’s flagship grand touring coupes and convertibles. Introduced in 2003, the luxury 2-door models have always focused on powerful driving dynamics and opulent cabins.

Here’s a quick overview of the 6 Series generations:

E63/E64 – 2003 to 2010 – Initial generation included the 645Ci coupe, 650i coupe, and 645Ci convertible models. Used either an N62 V8 or N54 twin-turbo engine.
F12/F13 – 2011 to 2018 – Second generation 6 Series came in coupe, convertible, and four-door “Gran Coupe” body styles. Featured more technology and available V8 engines.
G32 – 2017 to present – The current 6 Series is the third generation model, offered only as a coupe or convertible. Includes upgraded tech and available turbocharged six-cylinder and V8 engines.

Now let’s take a deeper look at the reliability of each generation and model year of the 6 Series.

BMW 6 Series Reliability by Model Year

Reliability of BMW 6 Series varies quite a bit by model year. In general, the earlier E63/E64 models have below average reliability, while the newer generations have improved.

Here’s an overview of 6 Series reliability by generation:

First Generation E63/E64 (2003-2010)

The first gen 6 Series span from 2003 to 2010 before being replaced by the new F12/F13 generation. Reliability of these early models is poor, with most model years receiving below average scores:

2003 – Rating of 2.5 out of 5 from J.D. Power. Common issues with fuel system, electrical, engine.
2004 – Also gets 2.5 out of 5 rating. Oil leaks, electrical faults, water pump failures occurred.
2005 – Slightly improved but still just 3 out of 5 from Consumer Reports. Alternator and fuel pump problems.
2006 – Little change in reliability. Engine sensor issues, oil leaks at high mileage.
2007 to 2009 – Reliability remains below average. Typical problems include faulty fuel injectors, door lock actuators, and electronics.
2010 – Only slight improvement as first gen wraps up. Electrical glitches and oil leaks still occur.

In summary, avoid 2003 to 2006 model years of first gen BMW 6 Series if reliability is a top concern. Late 2000s are better, but still score below rivals.

Second Generation F12/F13 (2011-2018)

The redesigned second generation 6 Series went on sale in 2011 and had improved reliability compared to the older E63/E64:

2011 – Teething issues on early second gen models led to an average 3 out of 5 reliability from CR. Oil leaks, electrical, and A/C compressor issues.
2012 – Continued electrical glitches but fewer major issues. J.D. Power rating improved to 4 out of 5.
2013 – Reliability finally above average, receiving top marks from Consumer Reports.
2014 to 2016 – Consistently average or better scores. Reduced major engine and electrical faults.
2017 – Still no major problem areas but dips slightly as generation ages.
2018 – Final year of second gen remains about average for the class.

In general, F12/F13 generation 6 Series from 2013 and newer have the best reliability of this luxurious line. Earlier model years still have a few more issues.

Third Generation G32 (2017-Present)

The current third generation BMW 6 Series went on sale in 2017 and continues today. Reliability so far has remained solid:

2017 – Mostly positive reviews of reliability from initial model year. Score of 4/5 from J.D. Power.
2018 to 2020 – Low number of issues reported. Remains above average for luxury coupes.
2021 and 2022 – Too new for detailed reliability data but expect continued good ratings.

While it’s hard to judge long-term reliability of the current 6 Series, the first five model years have had mostly positive reviews. No major problem areas stand out. Just typical minor BMW repairs needed.

Common BMW 6 Series Problems and Repairs

Even reliable vehicles will need some repairs, so it’s important to look at what problem areas and repair costs are common on 6 Series:

Engine

Oil leaks – Seals wear over time leading to external oil leaks, especially on N62 V8 engines. Can cost $1,500 or more if seals and gaskets need replacement.
Thermostat and coolant pipe failures – Can lead to overheating. Replacement cost around $450 for parts and labor.
Carbon buildup – Direct injection engines prone to carbon deposits on valves. Intake cleaning service can help avoid future issues.

Electrical

Alternator and battery – Outright alternator failures and battery drainage issues are reported on many model years. Costs $500+ for alt replacement.
Window regulator and door lock actuators – Common problem on all generations. Power window and lock repairs run $350+.
Instrument cluster and infotainment glitches – Cause gauges, stereo, and navigation to malfunction. Fixes can be complicated.

Other Common Issues

Oil filter housing gasket leaks – Known issue on many BMW engines. Gasket replacement up to $1,000 for parts and labor.
Fuel injectors – Failures and clogging reported, especially on N54 twin-turbo models. Replacement cost can be $800 per injector.
Leaky A/C evaporator – Refrigerant leaks occur on some second gen models. Evaporator replacements start around $1,200.

Severities and repair costs of issues vary quite a bit based on exact model and mileage. But in general, the above are some of the most commonly reported reliability problems.

Proper maintenance and addressing small problems early goes a long ways towards avoiding major repairs down the road.

Maintenance Costs and Longevity

To keep any luxury vehicle running smoothly for high mileage, diligent maintenance is required. Here’s a look at the typical ownership costs and lifespan of BMW 6 Series:

Annual maintenance and repair costs

According to RepairPal, the estimated average annual cost for maintenance and repairs on a BMW 6 Series is $1,281, which is significantly higher than comparable luxury coupes from brands like Mercedes and Audi.

Costs are broken down as follows:

Scheduled maintenance – $831 per year
Unscheduled repairs – $450 per year

Common maintenance items include oil changes, brake pads, tire rotation, filters, fluid flushes, spark plugs, drive belt, and battery. Extended warranties can help reduce unforeseen repair costs after the original 4-year/50,000 mile warranty expires.

Lifespan

With diligent maintenance, the 6 Series powertrains are mechanically capable of lasting 200,000+ miles. But most owners don’t keep them that long.

On average, BMW 6 Series models remain on the road for about 12 years and 120,000 miles. That’s slightly below comparable rivals from Mercedes, Audi and Jaguar. Electrical issues, oil leaks, and the high cost of repairs motivate people to sell. Proper maintenance and repair of issues early on can help maximize longevity.

For those who wish to keep their 6 Series long term, focusing on preventative maintenance and having a budget for repairs is highly recommended. These vehicles live a pampered life when new, so they tend to require the same level of care to reach high mileage.

Improving Reliability of Your 6 Series

If you own or are considering a used BMW 6 Series, here are some tips to help avoid issues and improve long-term reliability:

Preventative Maintenance

Follow the scheduled maintenance outlined in your owner’s manual – don’t delay oil changes, fluid flushes, etc.
Use quality synthetic oil and OEM or high quality replacement parts. Avoid cheap no-name parts.
Replace common wear items early – tires, brakes, battery, belts, spark plugs. Don’t wait for failure.
Consider an extended warranty for peace of mind after the original 4 year/50K warranty expires.

Watch For Leaks

Frequently check under car for leaks – oil, coolant, power steering and transmission fluid leaks indicate replaceable seals or gaskets. Address early before major damage occurs.
Also inspect inside car under floors for wetness – potential A/C evaporator leaks.

Drive Carefully

Avoid excessive engine revving when cold. Let engine warm up before aggressive acceleration.
Don’t frequently speed up hard and brake hard. Easy acceleration and braking improves longevity.
Highway driving is better than frequent short trips and stop-and-go traffic.

Address Strange Noises and Symptoms

Unusual engine noises, vibrations, and smells can indicate problems. Have inspected and repaired immediately.
Don’t ignore warning lights for drivetrain issues and electrical faults. Scan for codes.

Choose Repair Shop Wisely

Pick a reputable independent mechanic familiar with BMWs, not just any generic repair shop.
An experienced shop that specializes in German luxury cars is ideal – you get what you pay for.

Check Out BMW Owner Forums

Research common issues for your model on BMW forums and groups. Look for recalls.
Connect with other owners to get insights on maintaining and caring for your 6.

Following the above best practices will help your 6 Series remain in peak condition and maximize longevity. Paying attention and not ignoring minor issues goes a long way.

Are BMW 6 Series Reliable? Final Thoughts

While BMW 6 Series have gradually improved in reliability over the generations, they still have some problem areas – especially on earlier models. Electrical glitches and leaks are too common.

The best model years for reliability are 2013 and up. These have proven lower repair frequencies and costs than previous years. Also consider skipping the problematic 2003 to 2006 model years.

Maintenance costs are higher than rivals from Mercedes and Audi. And repairs can get very expensive unless you address minor issues early on. With diligent preventative maintenance and proactive repair of problems, a well cared for 6 Series should still be able to reach over 100,000 miles.

If you’re in the market for a used 6 Series, be picky on model year, service history and conduct a pre-purchase inspection. And budget for continued proper maintenance and repairs to maximize the enjoyment and longevity of your prized BMW grand tourer.