Pulse air system fault

[vorn]

Hi all, 

 

I've recently had the engine warning light come on along with a flashing cruise control symbol i.e. not working .  I'm advised that the air pulse system is faulty - valves seized and pump partially seized.  If I get it fully repaired using subaru parts I'm looking at £1200 costs ! I'm told it can be re mapped for approx £500. 

 

Has anyone got any experience of this, it does'nt seem to overly effect performance so I assume its something to do with emmissions ?