It is at the back of the engine bay. Fairly easy to remove I assume you are going to send the pump to
http://www.ecutesting.com/seat_toledo___leon___skoda_oct.html
Instructions for removal :-
WI-XML
Special tools and workshop equipment required t Torque wrench -V.A.G 1331- t Torque wrench -V.A.G 1410- t Brake pedal depressor -V.A.G 1869/2-
Sealing plugs repair kit, Part No. 1H0 698 311 A The transport protection for the valve contact pin must always be placed on the hydraulic unit after the control unit has been disconnected from the hydraulic unit. No guarantee will be recognised for hydraulic units without transport protection.
1 - Transport protection for valve contact pin (foam)
2 - Sealing plugs M 10
3 - Sealing plugs M 12 Removing Location: Control unit is bolted to hydraulic unit and is located on right in engine compartment.
WARNING
Do not bend the brake lines in the area of the hydraulic unit! – Read out and note the existing control unit code. – Note or request radio code on vehicles with coded radio if necessary. –
Disconnect battery
– Remove engine cover. 1.9l diesel engine:
– Remove connecting hose to intake pipe
– Remove intake manifold flap motor V157
2.0l diesel engine: – Touran vehicles only: Remove plenum chamber middle bulkhead
– Remove connecting pipe between intake hose and turbocharger.
– Remove toothed belt guard upper part.
Continuation for all vehicles:
– Release connector on control unit in direction of arrow -1- and pull off
-2-. – Fit brake pedal depressor -V.A.G 1869/2-.
– Connect bleeder bottle hose to front left brake caliper bleed valve and rear left brake caliper bleed valve and open bleed valves.
– Depress brake pedal at least 60 mm using brake pedal depressor -V.A.G 1869/2-.
– Close front left and rear left bleed valve. –
Do not remove brake pedal depressor -V.A.G 1869/2-.
– Place sufficient lint-free cloths under the control unit and hydraulic unit.
Ensure no brake fluid gets onto contacts.
– First identify the two brake master cylinder brake lines -A and B- and unscrew from the hydraulic unit.
– Immediately seal brake lines and threaded holes with seal plugs from repair set Part No. 1H0 698 311 A.
– Identify brake lines (brake calipers) -1 to 4-, unscrew and seal.
– Pull hydraulic unit with control unit upwards out of dampers.