Hartge has a very good solution for the "SD" motor , and you keep your warranty
12 35 0286 G

Engine conversion by ECU modification *
for X5 3.0sd (based on 210 kW / 286 hp)
241 kW (328 hp) / 4400 rpm 675 Nm (lb-ft 498) / 2000 rpma12300235 = '

'12 30 0235 G

Engine conversion by ECU modification *
for X5 3.0d (based on 173 kW / 235 hp)
202 kW (275 hp) / 4000 rpm 598 Nm (lb-ft 441) / 2000 rpm* with modification of the top speed limitAttention must be paid to the speed index of the tyres.
It cost nearly 1600€ , and you can send your ECU by fedex or other