If you're unsure whether or not your 2007 Toyota Rav4 needs rear suspension work, there are a few things you can check for. First, take a look at the shocks and struts. If they appear to be leaking or damaged in any way, they may need to be replaced. Another thing to look for is excessive play in the suspension components. If you can see that the components are moving around more than they should be, it's likely that they need to be tightened or replaced. Finally, if you notice that your Rav4 is bouncing excessively when driving over bumps or uneven surfaces, this could be an indication that the suspension needs attention. If you're still not sure, it's always best to consult with a qualified mechanic who can inspect the vehicle and give you a professional opinion.