Going to replace shocks/struts and front springs (likely getting a whole front assembly). Wondering if at 176k miles I should replace the rear springs with a newer OEM set? Tried searching for rear springs but all I see were posts about doing lowering springs.

 

Coming in waaaay late, but I'm in the exact same boat - what did you end up doing for rear springs? Only option to replace them (that aren't lowering) seems like genuine Honda springs, which are more expensive than I'd like. On that note, what did you end up going with for the front? I'm thinking about the pre-assembled KYBs from RockAuto since I don't have a spring compressor (and honestly don't really want to mess with that).

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2011 Honda Fit Sport (MT) 202k

 

I honestly don't know of anyone replacing springs. I guess if your car is riding low or if one is broken... Usually suspension problems are shocks and struts. If the car is bouncy, it's not the springs at fault but the shocks/struts.
The only scenario where I hear of people replacing springs is when they want something stiffer for better handling. It makes for a rough ride but corners hold better with stiff springs. I'm at 140k and have only replaced rear shocks. Springs are in great shape.

 

Would springs change rear camber at all? Mine is out and apparently not adjustable.

 

It's a beem in the rear, so springs shouldn't do anything :/
Have you had any alignment wear on the tires?

 

Camber is about how straight up and down the wheel is. If the top leans in or out from the bottom. Looking at the rear axle of the Fit/Jazz, I don't see how springs can affect or effect the camber. Looks to be built in. Meaning that one of the rear wheels took a hit sliding sideways into a curb?

 

Like the guys before have mentioned, springs don't need to be replaced on Honda sub-compacts. They just don't wear out. Better to save your money and buy an extra fuel pump. When they go bad, you or your mechanic will be scrambling to find one, and because the pump pressures are so critical, an aftermarket pump is ill advised.
Here's the scenario: Car won't start and all the usual tests have been completed - turns out the pump is bad. You or your mechanic will pay $400-450 for an OEM pump,(That's just the part, dropping the fuel tank and installation is about $200-300 more). Better to buy some insurance by getting a replacement Delphi FG1280 Fuel Module, $188.95 at amazon, $248.79 at rockauto.com to have on hand when the pump does go bad. You will save $200-260 and take that money and put it in your Fit maintenance budget.
Plus, if you ever do sell the car, having extra part(s) thrown in, makes the deal sweeter.
Niik