INTRODUCTION
Range Rovers are equipped with disc brakes all round. Front discs are 298.17mm (11.75") diameter (solid discs up to October '89, vented from then onwards) and rears are 290.0mm (11.42") diameter. Rear discs on all models are solid.
ABS was fitted to Vogue SE models from '90 onwards as standard, and was available as an option on other models.

IMPORTANT
Imperial & Metric threads - 1970 to 1989
The threads in the brake system of early (1970 to approx. 1984) Range Rovers are imperial (UNF). In 1984, calipers were changed to metric threads. Although similar in appearance, the two threads cannot be mixed; therefore, it is important to identify the type fitted to your vehicle before ordering replacement parts: Imperial threads. Front axle suffixes A,B,C,D & E and rear axle to suffix C, use imperial threads. (1970 to approx. 1984). Metric threads: Front axle suffix F and rear axle suffix D (approx 1984) onwards use metric threads. In addition, metric threads are marked with the letter M on one of the flats on the base of the threads. Finally, with the introduction of metric threads, a new Lockheed master cylinder was fitted, incorporating an integral PDWA & warning switch.

Imperial & Metric threads - 1990 onwards
With the introduction of vented front discs from VIN: GA (October 1989), imperial threads were again used in brake calipers. In 1994, these were changed to metric.

Change points for front calipers are as follows:

• Imperial calipers up to (front axle number)
  46L11839C
  49L11363C
  54L00056B
  57L05188B
  47L11587C
  50L00996C
  55L00497B
  48L05146C
  51L07997C
  56L03429B
  
  Metric calipers from (front axle number)
  46L11840C
  49L11364C
  54L00057B
  57L05189B
  47L11588C
  50L00997C
  55L00498B
  48L05147C
  51L07998C
  56L03430B


 

Change points for rear calipers are as follows:
Imperial calipers up to (rear axle number)
36S00594B & 34S16421C
Metric calipers from (rear axle number)
36S00595B & 34S16422C