Haldex v2 queries

After tracking down an intermittent traction alert on my MY07 Scout we found the problem is a faulty pump on the Haldex unit.

I did a lot of web trawling and eventually found one on aliexpress.com for just over 50 squid - a far better result than Mr VAG's several hundred pounds and a long wait!

The question; other than not being able to use 4WD is there any harm in holding off replacing the pump? It's a messy job involving a ramp and raising the rear axle so ideally I'd like to wait until the car is booked in for a cambelt/pump next year.

Answers on a postcard :)