Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Feb 2016
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: Feb 2016
Posts: 44 |
Hi, does anybody know how to replace the H4 main beam bulbs in a 2010 Roadster? Is it really necessary to dismantle the head light unit or can one access the bulb from the wing? Appreciate your advise...
Karsten
2010 Teal Roadster Sport V6
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Joined: Jul 2009
Posts: 1,127
Has a lot to Say!
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Has a lot to Say!
Joined: Jul 2009
Posts: 1,127 |
Hello & welcome to the Forum "231"!  You´ll have to dismantle the chromed trim/ring and the lens/reflector combination too to get to the bulb. On the other hand you could cut a BIG hole in your car´s wing from underneath, which nobody (??) here would recommend you to do 
It doesn´t matter how fast it becomes, but how it becomes fast.   2015 Roadster 3.7
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Joined: Feb 2016
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: Feb 2016
Posts: 44 |
Hi Numog, tahnks for your quick reply which confirms what I feared. Hope afterwards the lights do not need to readjusted... And the big hole in my beautiful wing, noooo 
Karsten
2010 Teal Roadster Sport V6
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Joined: Jan 2015
Posts: 168
L - Learner Plates On
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L - Learner Plates On
Joined: Jan 2015
Posts: 168 |
The chrome ring is held on by a small cross head screw usually close to the 6 o'clock position, it may require a stubby screwdriver (or right angle) to get at it.
The lamp unit is removed by taking out the (I think 3) retaining screws, be careful you do not touch the lamp position adjusting screws. A piece of white masking tape can be used to mark the glass unit's position in the headlamp well to aid in reassembly.
You may find that there is a sticky rubber gasket/foam which will need to be carefully separated.
Place a towel/blanket to rest glass unit on while you pull off the rear H4 connector and replace bulb.
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Joined: Jul 2009
Posts: 1,127
Has a lot to Say!
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Has a lot to Say!
Joined: Jul 2009
Posts: 1,127 |
No re-adjusting required if you just unscrew the items & put them back the same (IF the lights were set correctly before start that is!)
It doesn´t matter how fast it becomes, but how it becomes fast. 2015 Roadster 3.7
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Joined: Sep 2011
Posts: 2,814
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2011
Posts: 2,814 |
The chrome ring is held on by a small cross head screw usually close to the 6 o'clock position, it may require a stubby screwdriver (or right angle) to get at it.
The lamp unit is removed by taking out the (I think 3) retaining screws, be careful you do not touch the lamp position adjusting screws. A piece of white masking tape can be used to mark the glass unit's position in the headlamp well to aid in reassembly.
You may find that there is a sticky rubber gasket/foam which will need to be carefully separated.
Place a towel/blanket to rest glass unit on while you pull off the rear H4 connector and replace bulb.
I'd also suggest marking the position of the outer ring screw, before you remove it.
Gerry
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Joined: May 2014
Posts: 5,442 Likes: 133
Black Rat Charter Member
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Black Rat Charter Member
Joined: May 2014
Posts: 5,442 Likes: 133 |
A really simple job even I managed it, why not fit Nightbreaker bulbs while you're at it makes a huge difference.
Keith
2013 narrow bodied + 4 Ruby.
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Joined: Feb 2016
Posts: 44
Just Getting Started
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OP
Just Getting Started
Joined: Feb 2016
Posts: 44 |
many thanks for your comments/recommendation. I will try the Osram Nightbreaker and will mark everything carefully...
Karsten
2010 Teal Roadster Sport V6
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Joined: Feb 2012
Posts: 5,655 Likes: 4
Charter Member
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Charter Member
Joined: Feb 2012
Posts: 5,655 Likes: 4 |
many thanks for your comments/recommendation. I will try the Osram Nightbreaker and will mark everything carefully... I brought mine from Euro car parts for £17.00 Inc. vat for the pair
Martin (Deano)
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Joined: Jul 2007
Posts: 28,900 Likes: 352
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,900 Likes: 352 |
In many years of changing bulbs or sealed beam units I have never had them go back in without needing realigning - not difficult to do... 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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