lower wishbone suspension arm

[juany]

Hi, Ive got a 2007 1.8tdci focus and is there anyway of finding out what size lower wishbone suspension arms do i need as there are 2 sizes 18mm ball joint taper and a 21mm ball joint taper

 

Many thanks

[Tdci-Peter]

4 hours ago, juany said:

there are 2 sizes 18mm ball joint taper and a 21mm ball joint taper

According to Haynes, the larger diameter one has a blue band on the top of the gaiter, and the smaller one a yellow band. My car has a blue band, I checked recently. I had to wash the area with alcohol, but then it did show clearly. I have not removed it to confirm the size! But they were right about there being a colour band at least.

[juany]

thank you and yeah mine is also the larger size