Renew BOTH sets of front brake pads at the same time - NEVER renew the pads on only one wheel, as uneven braking may result. Note that although Ford brake pads do not contain asbestos, the dust created by wear of non-genuine pads may be a health hazard. Do not use compressed air to blow out brake dust and debris - use a brush. Avoid inhaling any of the dust, and wear an approved filtration mask. Use only proprietary brake cleaner fluid or methylated spirits to clean the brake components, DO NOT use petrol or any other petroleum-based product as this will damage the rubber seals.