I want to replace my 'yellow' bulbs with LEDs.

 

Car is 2010 Octavia L&K 1.8tsi facelift model.

 

The bulbs are in the fog light housing and are P21W.

 

I have looked on ebay and there seem to be lots of LED's of this type, but when I pull down the vehicle selector on the item page it says does not fit my vehicle???? ( I have pulled out bulb and checked so its def a P21W)

 

Also will the CREE Canbus type give me errors without load resistors ????? (They all claim error free but I'm sceptical)

 

If anyone can post a link to ones I need without resistors please.

 

Thanks for help in advance  

Edited 21 April, 201610 yr by promethian

P21W are correct for the non vRS FL DRL's.

 

The only valid way for a LED replacement bulb to prevent bulb warnings is to have a resistor built in. This tends to mean there is a resistor trying dump 21 watts of power into heat, if it's part of the P21W package I'd expect it to get hot enough to melt the bulb holder or DRL housing. Also, may cheaper LED P21W will have a resistor that can't dissipate 21W and will predictably fail.

 

Instead I would recommend you just find a quality non CANbus LED P21W.

 

If you do get a bulb out warning you have two choices:

- fit a resistor of the correct size to something that can dissipate the heat without damage

- take a drive as I should be able to disable the warning for you by editing the BCM light config

 

I fitted these on my FL which work great: http://www.morimotohid.com/led-lighting/morimoto-xb-led-1156-bulbs.html

P21W are correct for the non vRS FL DRL's.

 

The only valid way for a LED replacement bulb to prevent bulb warnings is to have a resistor built in. This tends to mean there is a resistor trying dump 21 watts of power into heat, if it's part of the P21W package I'd expect it to get hot enough to melt the bulb holder or DRL housing. Also, may cheaper LED P21W will have a resistor that can't dissipate 21W and will predictably fail.

 

Instead I would recommend you just find a quality non CANbus LED P21W.

 

If you do get a bulb out warning you have two choices:

- fit a resistor of the correct size to something that can dissipate the heat without damage

- take a drive as I should be able to disable the warning for you by editing the BCM light config

 

I fitted these on my FL which work great: http://www.morimotohid.com/led-lighting/morimoto-xb-led-1156-bulbs.html

 

Cheers Langers2k

 

It seems a waste to shunt the LED's with a resistor and waste 21W of power, so the option of taking a drive seems like a good idea  . I live in Kings Lynn area  so not sure how far you are away.

Get yourself a pair of these...

 

I found those adapters. I'm afraid if adapters will melt from heat. Any experience? Thank you!

On 27/07/2018 at 14:07, Krunoslav said:

I found those adapters. I'm afraid if adapters will melt from heat. Any experience? Thank you!

 

Forget the adapters/resistors and reconfigure the BCM instead! It has no sense to use heat resistors to get rid of fail messages, when it also available to set them off via software.

You will need a VCP (VagCanPro) interface (others can be also suitable, but not VCDS!) and a little program called VAGHelper.

You have to disable the warm diagnostic, and voilá!, no more bulb fail message due to the led drl.

 

Edited 30 July, 20187 yr by mucden

Disable warm diagnostic? How to do that?

I have read some instructions: 

 

Quote

2. Find somebody with VAS 5054a head and ODIS Engineering software. It could be VAG CAN Pro software as well. In the CECM module first login to the access and authorization by using 42013 login. Then go to the CECM memory cells and change the value of the following memory cells: 3109, 3110, 3111 from default values $02, $01, $30 to the modified $02, $81, $70 ($ = HEX).

 

Is this true?

20 hours ago, Krunoslav said:

Is this true?

 

Yup.