• Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.(Refer to General Information - "Lift and Support Points")
1.Disconnect the negative battery terminal.
2.Disconnect the heated oxygen sensor connector (A).

3.Remove the connector (A) from the bracket and then disconnecting the wiring from the wiring mounting holder (B).

4.Remove the engine room rear under cover.(Refer to Engine And Transaxle Assembly - "Engine Room Under Cover")
5.Remove the front muffler
(1)Remove the front muffler hanger (A).
(2)Remove the front muffler (B).
Tightening torque :A : 30.0 - 46.0 N.m (3.0 - 4.7 kgf.m, 21.7 - 34.0 lb-ft)B : 30.0 - 35.0 N.m (3.1 - 3.6 kgf.m, 22.4 - 26.0 lb-ft)

6.Install in the reverse order of removal.
• When installing, replace with new gaskets.
1.Remove the center muffler (A).
Tightening torque :39.2 - 58.8 N.m (4.0 - 6.0 kgf.m, 28.9 - 43.4 lb-ft)

2.Install in the reverse order of removal.
• When installing, replace with new gaskets.
1.Remove the rear muffler (A).
Tightening torque :39.2 - 58.8 N.m (4.0 - 6.0 kgf.m, 28.9 - 43.4 lb-ft)

2.Install in the reverse order of removal.
• When installing, replace with new gaskets.
EGR CoolerHyundai Tucson (NX4) 2022-2026 Service Manual: Special Service Tools
- Special Service Tools
Tool (Number and Name)IllustrationUse
Deployment tool0957A-34100A
Airbag deployment tool.Use with (0957A-AL140, 0957A-AL160)
Dummy0957A-38200
Simulator to check the resistanceof each wiring harness.Use with (0957A-AL170, 0957A-AL190)
Airbag deployment & dummy adapte ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Description and Operation
- Description
Emissions Control System consists of three major systems. • The
Crankcase Emission Control System prevents blow-by gas from releasing
into the atmosphere. This system recycles gas back into the intake
manifold (Closed Crankcase Ventilation Type).
• The Evaporative Emiss ...