[weiweinick]

Hi ~

My 528XI has warning message for right brake light bulb not working.

warning is 'right two stage brake lamp malfunction'

May I know which type is bulbs? Can I purchase from Amazon or ebay?

do you guys know how to replace it or guide?

many appreciate!

[Qsilver7]

Which brake light is not working? The rear left, rear right, or rear center?

[weiweinick]

Originally Posted by Qsilver7

Which brake light is not working? The rear left, rear right, or rear center?

it is right rear brake light not working.
can change the bulb? or need change whole light?
Thank you so much.

[Qsilver7]

Originally Posted by weiweinick

it is right rear brake light not working.
can change the bulb? or need change whole light?
Thank you so much.

What is listed in your owners manual for the rear tail light? Do you have a replaceable brake light bulb?

For example, when I look in my F06 (650ix GC) owners manual...it lists all of the bulb/lights for the rear tail light assembly. The f06 has TWO types of rear brake light bulbs...only one of them is easily replaceable (the inside bulb) and can probably be purchased just about anywhere automotive bulbs are sold ...and the other (outer brake light) is an LED. The owners manual also lists the (inside) replaceable brake light bulb's wattage and type:

[weiweinick]

Originally Posted by Qsilver7

What is listed in the owners manual for the rear tail light? Do you have a replaceable brake light bulb?

sorry, I donot have the bulb, because I do not know what kind of bulb could replaceable.

[Qsilver7]

See my post above (there may have been more added prior to your last post)...since your F10 and my F06 are generational "cousins"...there may be some very similar set-ups.

If you don't have an owners manual handy...just do a quick google/internet search for a BMW f10 5 series owners manual PDF"...then download or open it. You can then just do a quick search in Acobe Acrobat (probably the app that will open the PDF) and type "bulbs" to quickly find the rear tail light index and other info that may lead you to if your issue is an LED bulb or a simple replacement incandescent or halogen bulb.

Are there any F10 owners reading this that can chime in with info?

EDIT:

I googled for an F10 owners manual...and just like I suspected...these generational "cousins" have a very similar set-up. It appears that you have an inner and outer brake light...and the inner light is replaceable (bulb is listed in owners manual...so should be easy to find at any auto parts store)...but the outer brake light is LED:

[weiweinick]

Originally Posted by Qsilver7

What is listed in your owners manual for the rear tail light? Do you have a replaceable brake light bulb?

For example, when I look in my F06 (650ix GC) owners manual...it lists all of the bulb/lights for the rear tail light assembly. The f06 has TWO types of rear brake light bulbs...only one of them is easily replaceable (the inside bulb) and can probably be purchased just about anywhere automotive bulbs are sold ...and the other (outer brake light) is an LED. The owners manual also lists the (inside) replaceable brake light bulb's wattage and type:

Thank you very much, I also find the manual, and find one of outer brake is LED, if it is LED that means only change of all them, no replaceable bulb inside?
other one 21-watt bulb, H21W.

[Qsilver7]

If it is the LED brake light that is out (not functioning)...then the fix may be a bit more complicated than the inner brake light bulb.

If it's the inner brake bulb that is out...then as listed in the owners manual...just type 21w h21w bulb into a google/internet search box to find vendors selling that bulb online. Or stop into your local Walmart/Target/AutoZone/Advanced Auto/Pep Boys/O'Reilly's/etc and go to the automotive bulb section to find a 21w H21W light bulb.

[weiweinick]

Originally Posted by Qsilver7

If it is the LED brake light that is out (not functioning)...then the fix may be a bit more complicated than the inner brake light bulb.

If it's the inner brake bulb that is out...then as listed in the owners manual...just type 21w h21w bulb into a google/internet search box to find vendors selling that bulb online. Or stop into your local Walmart/Target/AutoZone/Advanced Auto/Pep Boys/O'Reilly's/etc and go to the automotive bulb section to find a 21w H21W light bulb.

really helpful, thanks Qsilver, I will try to check again. your are

[Qsilver7]

Good luck...and I do hope its the inner (easier bulb) that is causing your warning light.

[weiweinick]

Originally Posted by Qsilver7

Good luck...and I do hope its the inner (easier bulb) that is causing your warning light.

Thanks, yesterday I double check, the light is working and alert is removed.

but in the morning, the alert is coming again when driving at the road. I am afraid the cops see and pull over..

I had search and find some guys have same problem they assumed lower temperature and wet air..

I have go to BMW store at weekend for checking.

[Qsilver7]

Originally Posted by weiweinick

Thanks, yesterday I double check, the light is working and alert is removed.

but in the morning, the alert is coming again when driving at the road. I am afraid the cops see and pull over..

I had search and find some guys have same problem they assumed lower temperature and wet air..

I have go to BMW store at weekend for checking.

I would recommend getting in there to take a look. You may have some corrosion or electrical arching going on that may be causing the issue...or if the bulbs are incandescent or halogen...you may have a filament that has broken loose and is sometimes making contact...but then being jarred and losing contact. The only way to tell in this case is to physically pull the bulb and give it a gentle shake. Then while it is out...look at the bulb holder to see if there's any corrosion or burn marks (electrical arching).

EDIT: just did a google search for the H21w bulb...and it is a halogen bulb...but it does have a filament: