Brake pad size

Faults and Technical chat for the Volvo XC40
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BA777
Posts: 20
Joined: Fri Feb 09, 2018 11:05 am

Post by BA777 »

Hi,

I have a first edition XC40 with 20" wheels and need new front brake pads.

What size pads will I need? I can see 15", 16" or 18" listed online.
XC40 | First Edition | 2.0 D4 4WD [190] | Osmium Grey | 20" wheels | Ordered 07/02/18

Dermottdog
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Location: Orpington, Kent

Post by Dermottdog »

The size of wheel wouldn’t dictate the pad size.
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BA777
Posts: 20
Joined: Fri Feb 09, 2018 11:05 am

Post by BA777 »

Thanks so how do I know what size I need?
XC40 | First Edition | 2.0 D4 4WD [190] | Osmium Grey | 20" wheels | Ordered 07/02/18
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Greggspies
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Post by Greggspies »

Brake pads are not sold by size, BA777. A parts supplier will want to know your vehicle details to get you the right ones for your car.
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Dermottdog
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Location: Orpington, Kent

Post by Dermottdog »

BA777 wrote: Sun Jul 04, 2021 5:27 pm Thanks so how do I know what size I need?
As said, the parts supplier will be able/should be able to identify which pads you need. It might be that all the pads are the same or it might be that the pads are a different size due to spec of the car (a T3 might have smaller discs, and therefore smaller pads than a T5 for example).
R Design Pro T5 AWD in Crystal White. Convenience Pack, Front Parking and Apple Car. Couldn’t afford anything else!! Arriving late September 2019.
uncle_sam
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Joined: Thu Jan 04, 2024 7:03 am

Post by uncle_sam »

I discovered that the Rotor size (diam in mm) is stamped on top of the brake caliper. It's 3-digits like 296 or 322. The rotor part number stamp is 8-digits. Same goes with the rear rotors, though they're typically smaller diameter.

When ordering the brake pads, the size should correspond to the rotor size/diameter.
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percymon
Posts: 141
Joined: Thu Oct 27, 2022 12:22 pm

Post by percymon »

The Brembo parts catalogue is very useful for such enquiries - i've never found any errors in it. There are two options for front pads on the D4, dependent upon whether you have a Teves or Bosch system

https://www.bremboparts.com/europe/en/c ... 00128760-1
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