* Access: The injectors are tucked away in the engine bay, requiring removal of various components for access, such as intake manifold components (possibly the entire upper intake), and possibly even other parts. This adds significant time and complexity.
* Fuel System Pressure: You'll need to relieve pressure from the fuel system to prevent fuel spills and injury. This usually involves disconnecting the fuel pump relay or using a fuel pressure gauge.
* O-rings and Seals: New O-rings and seals are crucial to prevent leaks. Damaging these during installation can lead to fuel leaks and require further work.
* Torque Specifications: Correct torque values must be used for all bolts to prevent damage. Using a torque wrench is essential.
* Potential for Damage: There's a risk of damaging delicate components during disassembly and reassembly.
In short: If you're comfortable working on cars, have a good set of tools including a torque wrench, and have access to a repair manual (highly recommended), you *might* be able to do it. However, if you're not comfortable with these aspects, it's best to leave it to a professional mechanic to avoid costly mistakes and potential damage. The labor cost will be significant due to the labor involved in access and removal of components.
