This procedure covers the removal and replacement of the exhaust resonator on a 2019-2024 Toyota RAV4 with the 2.5L I4 gasoline engine.

Warnings

Tools required

Parts

• Exhaust resonator assembly × 1 — Use OEM specification
• Exhaust gasket (if flange connection) × 1 — Use OEM specification
• Exhaust rubber hangers — As needed if damaged

Preparation

1. Park vehicle on level ground and apply parking brake
2. Place wheel chocks behind rear wheels
3. Allow exhaust system to cool completely (minimum 2 hours after last operation)
4. Raise front of vehicle with floor jack and support securely on jack stands at manufacturer-specified lift points
5. Spray all exhaust fasteners and connections with penetrating oil and allow to soak for 15-30 minutes

Procedure

1. 1

   Access the resonator
   Position yourself under the vehicle with adequate lighting. Locate the resonator assembly in the center section of the exhaust system, typically beneath the passenger compartment area. Identify all mounting points including rubber hangers and clamp or flange connections at both ends.
2. 2

   Support the exhaust system
   Position a jack or exhaust support stand under the muffler section behind the resonator to prevent the rear exhaust from dropping when the resonator is disconnected. Adjust height to maintain the exhaust in its natural position without strain.
3. 3

   Disconnect front connection
   Identify the connection type at the front of the resonator (either clamp or flange). If clamp-type: loosen the exhaust clamp bolts using a 14mm socket. If flange-type: remove the flange bolts using a 15mm socket while holding the nuts with a 15mm wrench. Separate the connection carefully, removing any gasket material.
   Torque spec

   Exhaust Clamps55 Nm (41 lb-ft)

   Flange Bolts45 Nm (33 lb-ft)
4. 4

   Disconnect rear connection
   Repeat the disconnection process for the rear connection of the resonator. Apply additional penetrating oil if fasteners are seized. Use a wire brush to clean threads if necessary. If bolts are severely corroded, be prepared to cut the clamp or use a bolt extractor.
   Torque spec

   Exhaust Clamps55 Nm (41 lb-ft)

   Flange Bolts45 Nm (33 lb-ft)
5. 5

   Remove rubber hanger supports
   Locate the rubber hangers supporting the resonator (typically 1-2 hangers). Using a pry bar or exhaust hanger removal tool, carefully separate the metal hanger loops from the rubber grommets. Work the loops out by pushing the exhaust component toward the grommet to create slack, then pulling the loop free. Inspect rubber hangers for cracking or deterioration.
6. 6

   Remove resonator assembly
   With all connections and hangers released, carefully lower and remove the resonator assembly from the vehicle. Maneuver it past any crossmembers or suspension components. Note the orientation and position for installation of the replacement unit.
7. 7

   Clean mounting surfaces
   Using a wire brush, thoroughly clean all flange surfaces, clamp areas, and connection points on the remaining exhaust sections. Remove all old gasket material, carbon deposits, and corrosion to ensure proper sealing. Inspect pipes for damage or excessive corrosion.
8. 8

   Install new resonator
   Position the new resonator assembly under the vehicle, aligning it with the front and rear exhaust sections. Install new gaskets at flange connections if applicable. Begin threading fasteners hand-tight at both connections before fully tightening. Ensure proper alignment to avoid exhaust leaks and stress on joints.
9. 9

   Attach rubber hangers
   Reconnect the resonator to the rubber hanger grommets. Use a rubber mallet to tap the hanger loops into the grommets if needed, or apply a small amount of soapy water to ease installation. Verify that the exhaust system hangs naturally without binding or excessive tension.
10. 10

    Tighten front connection
    Using a torque wrench, tighten the front connection fasteners to specification. For clamp connections, tighten evenly in a cross pattern if multiple bolts are present. For flange connections, tighten bolts in alternating pattern to ensure even gasket compression and prevent leaks.
    Torque spec

    Exhaust Clamps55 Nm (41 lb-ft)

    Flange Bolts45 Nm (33 lb-ft)
11. 11

    Tighten rear connection
    Repeat the tightening process for the rear connection using the torque wrench and appropriate specification. Double-check alignment before final torque to ensure the resonator is positioned correctly and not twisted or misaligned.
    Torque spec

    Exhaust Clamps55 Nm (41 lb-ft)

    Flange Bolts45 Nm (33 lb-ft)
12. 12

    Final inspection and alignment check
    Remove the support from under the rear exhaust section. Visually inspect the entire exhaust system for proper clearance from fuel lines, brake lines, suspension components, and body panels. Check that all hangers are properly seated and no components are touching or binding. Verify minimum 1/2 inch clearance from all adjacent parts.

Reassembly

1. Ensure all exhaust connections are torqued to specification
2. Verify all rubber hangers are properly installed and exhaust system hangs freely
3. Confirm adequate clearance between exhaust and all vehicle components

Verification

• Lower vehicle from jack stands safely
• Start engine and listen for exhaust leaks at both resonator connections while engine is cold
• Allow engine to reach operating temperature and recheck for leaks
• Perform a test drive and listen for any unusual exhaust noises, rattles, or vibrations
• After test drive, raise vehicle and recheck all fasteners for proper torque and verify no contact points have developed

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