2008 x5 v6 Front Suspension Thrust Rod Bushing and Oil Filter housing gaskets replace

[darienyeri]

Hello everyone.

I have a 2008 x5 v6 that has less than 40,000 miles on it. It also has 10 year extended warranty for the In-tank fuel (Pump) Delivery Module.

I brought it in to the dealer to replace the recalled airbags, and got the car checked for the misfires and the engine light on.

I just got a following quotes.

Replace all ign. coils and spark plugs for $995
Replace the Front suspension Thrust rod bushings for $709
Replace the oil filter housing gaskets for $705


I'm aware the cost is exorbitant.
So I'm going to DIY the ign. coils and spark plugs and take it to an indy shop for the Front Suspension Thrust Rod Bushings and Oil Filter Housing Gaskets.
I need to do more research but I might do the oil filter housing gaskets myself as well if it's easy enough.

My question is do you think the in-tank fuel pump could be causing the problems for the coils and spark plugs?
I already replaced spark plugs with NGK spark plugs less than 3 years ago and drove less than 10,000 miles on it. I'm surprised they need replacement so soon.
I'm worried that the in-tank fuel pump is malfunctioning and could be be the original cause for misfires.
I'm trying to see if I should push the dealer harder to replace the in-tank fuel pump or not while the warranty is still active.
At my mileage and the age of the car, do you recommend just replacing all the coils and plugs at once? Or do you think I should try swapping them to find the dead coils and plugs, and just replace those for now?

I'd appreciate any insights or advices.

Thank you for reading.