This procedure covers removal and replacement of the fuel rail assembly on a 2012-2017 Toyota Camry with the 2.5L I4 engine, including fuel system depressurization and injector handling.

Warnings

Tools required

Parts

• Fuel rail assembly × 1 — Use OEM specification
• Fuel injector O-rings (if reusing injectors) × 8 — 90301-10014 or equivalent
• Fuel line O-rings × 2 — Use OEM specification
• Intake manifold gasket (recommended) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Ensure engine is completely cool before starting work
3. Disconnect negative battery terminal and wait 90 seconds to allow airbag system to discharge
4. Place drain pan and shop towels under work area to catch fuel spillage
5. Relieve fuel system pressure by removing fuel pump relay (EFI-2 in engine compartment fuse box) and starting engine until it stalls, then crank for 3 seconds to ensure complete depressurization

Procedure

1. 1

   Remove engine cover
   Pull upward on the engine cover to disengage the four mounting grommets. The cover is not bolted and removes with firm upward pressure. Set aside in a clean area.
2. 2

   Disconnect air intake system
   Loosen the hose clamp at the throttle body using a flathead screwdriver or 8mm socket. Disconnect the MAF sensor electrical connector by pressing the tab and pulling straight out. Remove the air intake tube by pulling it off the throttle body. Disconnect any vacuum lines attached to the intake tube.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
3. 3

   Remove fuel feed line
   Locate the fuel feed line connection on the driver's side of the fuel rail. Using the appropriate fuel line disconnect tool, press the retaining clips and carefully pull the fuel line straight off. Have shop towels ready to catch residual fuel. Inspect the connection for the O-ring and note its position for reassembly.
   ⚠Even with pressure relieved, residual fuel will spill. Keep towels ready and avoid contact with skin.
4. 4

   Disconnect fuel injector electrical connectors
   Disconnect all four fuel injector electrical connectors by pressing down on the locking tab and pulling the connector straight up and away from each injector. Move the wiring harness aside to provide clearance for fuel rail removal.
5. 5

   Remove vacuum line and PCV hose
   Disconnect the fuel pressure regulator vacuum line from the fuel rail if equipped. On 2AR-FE engines, disconnect the PCV hose from the intake manifold side to provide clearance. Note routing for reinstallation.
6. 6

   Remove fuel rail mounting bolts
   Remove the two 12mm fuel rail mounting bolts located at either end of the fuel rail assembly. Keep these bolts organized as they will be reused. The fuel rail is now ready to be removed from the intake manifold.
   Torque spec

   Fuel Rail Bolts12 Nm (9 lb-ft)
7. 7

   Remove fuel rail assembly
   Carefully pull the fuel rail straight up and away from the intake manifold. The four fuel injectors will come out with the rail. Use gentle rocking motion if needed, but avoid angling the rail as this can damage injector O-rings or injector tips. Place the assembly on a clean work surface with injector tips facing up.
   ⚠Pull fuel rail straight up to avoid bending or damaging fuel injectors. Do not pry or angle the rail.
8. 8

   Remove injectors from old rail (if reusing injectors)
   If reusing fuel injectors with a new rail, remove the retaining clips from each injector using needle nose pliers. Pull each injector straight out of the fuel rail. Remove and discard all old O-rings from each injector (two O-rings per injector). Clean the injector bodies with shop towels and inspect for damage.
9. 9

   Prepare intake manifold and new fuel rail
   Inspect the fuel injector bores in the intake manifold for debris or damage. Clean with a shop towel if needed. If installing new injectors, ensure they come with new O-rings. If reusing injectors, lubricate new O-rings with clean gasoline and install onto each injector. Install injectors into the new fuel rail and secure with retaining clips.
   ℹ️Always use new O-rings when reassembling fuel system components. Old O-rings will leak.
10. 10

    Install new fuel rail assembly
    Align all four fuel injectors with their respective bores in the intake manifold. Press the fuel rail assembly straight down with firm, even pressure until all injectors are fully seated. Ensure the rail sits flush against the mounting surfaces.
11. 11

    Install fuel rail mounting bolts
    Install the two fuel rail mounting bolts and tighten by hand initially. Using a torque wrench, tighten the bolts to specification in a crisscross pattern to ensure even seating of the injectors.
    Torque spec

    Fuel Rail Bolts12 Nm (9 lb-ft)
12. 12

    Reconnect fuel feed line
    Install a new O-ring onto the fuel feed line connection if not already present. Push the fuel line firmly onto the fuel rail connection until you hear or feel a distinct click indicating the retaining clips have engaged. Gently pull on the line to verify it is locked in place.
    ℹ️Use new O-rings on fuel line connections as specified in torque specs. Verify positive engagement by pulling on the connected line.
13. 13

    Reconnect electrical and vacuum connections
    Reconnect all four fuel injector electrical connectors, ensuring each clicks securely into place. Reconnect the fuel pressure regulator vacuum line and PCV hose to their original positions. Verify all connections are secure.
14. 14

    Reinstall air intake system
    Reinstall the air intake tube onto the throttle body. Tighten the hose clamp to specification. Reconnect the MAF sensor electrical connector and any vacuum lines removed during disassembly.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)

Reassembly

1. Reinstall the fuel pump relay (EFI-2) in the engine compartment fuse box
2. Reconnect the negative battery terminal
3. Reinstall the engine cover by aligning the grommets and pressing down firmly
4. Before starting the engine, turn the ignition key to ON position (without starting) for 2 seconds, then OFF. Repeat this 3-4 times to prime the fuel system and check for leaks around all connections

Verification

• Visually inspect all fuel connections for leaks with ignition in ON position
• Start the engine and allow it to idle. Check again for fuel leaks around the fuel rail, injectors, and feed line connection
• Verify smooth engine operation with no misfires or rough idle
• Check for proper fuel pressure by observing engine performance under light acceleration
• Inspect the work area one final time after 5 minutes of running to ensure no fuel seepage has occurred

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