Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER2003300M V6-3.5L VIN MREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSCATALYTIC CONVERTERSERVICE AND REPAIRRIGHT SIDE
2003 Chrysler 300M V6-3.5L VIN M
Right Side
2003 Chrysler 300M V6-3.5L VIN MSECTION Right Side
CATALYTIC CONVERTER - RIGHT
REMOVAL - RIGHT SIDE
WARNING: THE NORMAL OPERATING TEMPERATURE OF THE EXHAUST SYSTEM IS VERY HIGH. THEREFORE, NEVER WORK AROUND OR ATTEMPT TO SERVICE ANY PART OF THE EXHAUST SYSTEM UNTIL IT IS COOLED. SPECIAL CARE SHOULD BE TAKEN WHEN WORKING NEAR THE CATALYTIC CONVERTER. THE TEMPERATURE OF THE CONVERTER RISES TO A HIGH LEVEL AFTER A SHORT PERIOD OF ENGINE OPERATION TIME.
1. Disconnect negative battery cable at remote jumper terminal located at right strut tower.
2. Raise vehicle on hoist.
3. Remove exhaust system.
4. Lower vehicle.
5. Disconnect Inlet Air Temperature (IAT) Sensor connector.
6. Loosen hose clamp for throttle body air inlet hose.
7. Disconnect make up air hose from right cylinder head cover.

8. Remove air cleaner assembly with air inlet hose.
9. Disconnect ground strap at right frame rail/shock tower area.
10. Remove air cleaner resonator support bracket from right cylinder head.
11. Disconnect downstream oxygen sensor connector and remove sensor from converter pipe.

12. Loosen and remove V-Band clamp at exhaust manifold.
NOTE: Do not reuse V-Band clamp.
13. Raise vehicle on hoist.
14. Remove nut attaching right catalytic converter hanger bracket to transaxle bracket.

15. Support front of engine cradle on both sides with suitable jack stands.
16. Support transmission oil pan with suitable transmission jack.

17. Loosen front engine cradle bolts two to three turns.
18. Remove rear engine cradle bolts.
19. Lower the rear of the engine cradle 76 mm (3 in.) with the transmission jack to allow removal of catalytic converter from engine compartment.

NOTE: To allow enough clearance for catalytic converter removal, remove hanger bracket from hanger. The use of a helper under the vehicle to guide the catalytic converter will ease removal operation.
20. Remove catalytic converter by twisting/turning while pulling up from TOP SIDE of engine compartment.
INSTALLATION - RIGHT SIDE
NOTE: To allow enough clearance for catalytic converter installation, remove hanger bracket from hanger.
NOTE: Do not reuse V-Band clamp.
1. Position a NEW V-Band clamp onto the exhaust manifold outlet. DO NOT latch the clamp's T-bolt at this time.
NOTE: The use of a helper under the vehicle to guide the catalytic converter will ease installation operation.
2. Install catalytic converter from TOP SIDE of engine compartment. If necessary, stretch open the V-Band clamp to allow the converter to engage the manifold outlet.
3. Latch the V-Band clamp T-bolt.
4. Install hanger bracket onto hanger.
5. Hand start nut attaching right catalytic converter hanger bracket to transaxle bracket.
6. Raise engine cradle with transmission jack until cradle contacts vehicle body. Install rear cradle bolts. Torque rear cradle bolts to 102 Nm (75 ft. lbs.). Torque front cradle bolts to 109 Nm (80 ft. lbs.).
7. Remove jack stands and transmission jack.
8. Lower vehicle.
NOTE: Check for proper alignment and clearance to underbody and engine compartment components before tightening clamps.
9. Tighten V-Band clamp to 11 Nm (100 in. lbs.).
10. Install downstream oxygen sensor and connect electrical connector.
11. Install air cleaner resonator support bracket to right cylinder head.
12. Connect ground strap at right frame rail/shock tower area.
13. Install air cleaner assembly with air inlet hose.
14. Connect make up air hose to right cylinder head cover.
15. Tighten hose clamp for throttle body air inlet hose.
16. Connect Inlet Air Temperature (IAT) Sensor connector.
17. Raise vehicle on hoist.
18. Torque nut attaching right catalytic converter hanger bracket to transaxle bracket to 47 Nm (35 ft. lbs.).
19. Install exhaust system.
20. Lower vehicle.
21. Connect negative battery cable.
REMOVAL - RIGHT SIDE
WARNING: THE NORMAL OPERATING TEMPERATURE OF THE EXHAUST SYSTEM IS VERY HIGH. THEREFORE, NEVER WORK AROUND OR ATTEMPT TO SERVICE ANY PART OF THE EXHAUST SYSTEM UNTIL IT IS COOLED. SPECIAL CARE SHOULD BE TAKEN WHEN WORKING NEAR THE CATALYTIC CONVERTER. THE TEMPERATURE OF THE CONVERTER RISES TO A HIGH LEVEL AFTER A SHORT PERIOD OF ENGINE OPERATION TIME.
1. Disconnect negative battery cable at remote jumper terminal located at right strut tower.
2. Raise vehicle on hoist.
3. Remove exhaust system.
4. Lower vehicle.
5. Disconnect Inlet Air Temperature (IAT) Sensor connector.
6. Loosen hose clamp for throttle body air inlet hose.
7. Disconnect make up air hose from right cylinder head cover.
8. Remove air cleaner assembly with air inlet hose.
9. Disconnect ground strap at right frame rail/shock tower area.
10. Remove air cleaner resonator support bracket from right cylinder head.
11. Disconnect downstream oxygen sensor connector and remove sensor from converter pipe.
12. Loosen and remove V-Band clamp at exhaust manifold.
NOTE: Do not reuse V-Band clamp.
13. Raise vehicle on hoist.
14. Remove nut attaching right catalytic converter hanger bracket to transaxle bracket.
15. Support front of engine cradle on both sides with suitable jack stands.
16. Support transmission oil pan with suitable transmission jack.
17. Loosen front engine cradle bolts two to three turns.
18. Remove rear engine cradle bolts.
19. Lower the rear of the engine cradle 76 mm (3 in.) with the transmission jack to allow removal of catalytic converter from engine compartment.
NOTE: To allow enough clearance for catalytic converter removal, remove hanger bracket from hanger. The use of a helper under the vehicle to guide the catalytic converter will ease removal operation.
20. Remove catalytic converter by twisting/turning while pulling up from TOP SIDE of engine compartment.
INSTALLATION - RIGHT SIDE
NOTE: To allow enough clearance for catalytic converter installation, remove hanger bracket from hanger.
NOTE: Do not reuse V-Band clamp.
1. Position a NEW V-Band clamp onto the exhaust manifold outlet. DO NOT latch the clamp's T-bolt at this time.
NOTE: The use of a helper under the vehicle to guide the catalytic converter will ease installation operation.
2. Install catalytic converter from TOP SIDE of engine compartment. If necessary, stretch open the V-Band clamp to allow the converter to engage the manifold outlet.
3. Latch the V-Band clamp T-bolt.
4. Install hanger bracket onto hanger.
5. Hand start nut attaching right catalytic converter hanger bracket to transaxle bracket.
6. Raise engine cradle with transmission jack until cradle contacts vehicle body. Install rear cradle bolts. Torque rear cradle bolts to 102 Nm (75 ft. lbs.). Torque front cradle bolts to 109 Nm (80 ft. lbs.).
7. Remove jack stands and transmission jack.
8. Lower vehicle.
NOTE: Check for proper alignment and clearance to underbody and engine compartment components before tightening clamps.
9. Tighten V-Band clamp to 11 Nm (100 in. lbs.).
10. Install downstream oxygen sensor and connect electrical connector.
11. Install air cleaner resonator support bracket to right cylinder head.
12. Connect ground strap at right frame rail/shock tower area.
13. Install air cleaner assembly with air inlet hose.
14. Connect make up air hose to right cylinder head cover.
15. Tighten hose clamp for throttle body air inlet hose.
16. Connect Inlet Air Temperature (IAT) Sensor connector.
17. Raise vehicle on hoist.
18. Torque nut attaching right catalytic converter hanger bracket to transaxle bracket to 47 Nm (35 ft. lbs.).
19. Install exhaust system.
20. Lower vehicle.
21. Connect negative battery cable.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.