Jeep Grand Cherokee models typically contain two catalytic converters positioned along the exhaust system. If you’re wondering exactly how many catalytic converters are in a jeep grand cherokee, the answer depends on the model year and engine type. Most Grand Cherokees have two converters, but some older models may have three or even four.
Catalytic converters are part of your Jeep’s emission control system. They reduce harmful pollutants before they exit the exhaust pipe. Knowing the number and location helps with repairs, replacements, or if you’re dealing with theft concerns.
How Many Catalytic Converters Are In A Jeep Grand Cherokee
For most Jeep Grand Cherokee models, the standard answer is two catalytic converters. One is located near the exhaust manifold (the front converter), and the other is further down the exhaust system (the rear converter). However, this isn’t universal across all years and engines.
Model Year Variations
Here’s a breakdown by common model years:
- 1993–1998 (ZJ generation): Usually two converters. The 5.2L V8 and 4.0L inline-six both use two.
- 1999–2004 (WJ generation): Still two converters for most engines. The 4.7L V8 also uses two.
- 2005–2010 (WK generation): Two converters for the 3.7L V6 and 5.7L HEMI V8. The 6.1L SRT8 had four converters.
- 2011–2021 (WK2 generation): Two converters for the 3.6L Pentastar V6 and 5.7L HEMI. The 6.4L SRT8 and Trackhawk had four.
- 2022–present (WL generation): Two converters for the 3.6L V6 and 5.7L HEMI. The 4xe plug-in hybrid has two as well.
Engine-Specific Counts
Different engines have different converter setups. Here’s a quick reference:
- 3.6L Pentastar V6: Two converters (one per bank, close to the engine).
- 5.7L HEMI V8: Two converters (one per exhaust manifold).
- 6.4L HEMI V8 (SRT8/Trackhawk): Four converters (two per bank, with secondary converters).
- 4.0L inline-six: Two converters (one front, one rear).
- 2.0L turbo four-cylinder (4xe): Two converters (one close-coupled, one underbody).
Location Of Catalytic Converters On A Jeep Grand Cherokee
Knowing where the converters are helps with inspection or replacement. Here’s where to find them:
Front Converters
The front converters are located right after the exhaust manifolds. On V6 and V8 engines, there’s one per cylinder bank. They’re bolted directly to the manifold or connected by a short pipe. You can see them from underneath the vehicle, near the engine block.
Rear Converters
The rear converter(s) are further back, usually under the vehicle’s floorpan. On models with two converters, the rear one is after the front converter, closer to the muffler. On models with four converters, there are two rear converters in addition to the two front ones.
Visual Identification Tips
- Jack up the vehicle safely and support it on jack stands.
- Look for metal canisters along the exhaust pipe. They’re about the size of a large coffee can.
- Front converters are near the engine, rear converters are under the cabin.
- Check for heat shields—converters often have metal shields around them.
- Count the number of oxygen sensors. Each converter usually has one sensor before and one after it.
Why The Number Matters
Knowing how many catalytic converters your Grand Cherokee has affects several things:
- Replacement cost: More converters means higher parts and labor costs.
- Theft risk: Converters contain precious metals like platinum, palladium, and rhodium. Jeeps with two or four converters are targets.
- Emission testing: Missing or faulty converters can cause a check engine light and failed smog tests.
- Performance: Clogged converters reduce engine power and fuel economy.
Common Problems With Jeep Grand Cherokee Catalytic Converters
Catalytic converters can fail over time. Here are typical issues:
Clogging
Engine misfires or oil burning can clog the converter’s honeycomb structure. This causes poor acceleration and a sulfur smell. You might notice the engine struggling at highway speeds.
Theft
Jeep Grand Cherokees are popular targets for catalytic converter theft. Thieves slide under the vehicle and cut the converter out with a saw. This happens in minutes, especially in parking lots or driveways.
Oxygen Sensor Issues
Faulty oxygen sensors can make the computer think the converter is bad. The check engine light comes on with codes like P0420 or P0430. Sometimes the converter is fine, but the sensor needs replacing.
Physical Damage
Hitting a curb or large rock can dent or crack the converter. This reduces its effectiveness and can cause exhaust leaks. You’ll hear a louder exhaust note or feel vibration.
How To Tell If Your Converter Needs Replacement
Signs of a failing catalytic converter include:
- Check engine light illuminated
- Rattling noise from under the vehicle (broken internal honeycomb)
- Reduced engine power or hesitation
- Poor fuel economy
- Rotten egg smell from exhaust
- Failed emissions test
Diagnostic Steps
- Use an OBD2 scanner to read trouble codes. Codes P0420 (bank 1) or P0430 (bank 2) indicate converter efficiency issues.
- Check exhaust temperature. A working converter gets very hot—up to 600°F. If it’s cold after driving, it’s not working.
- Inspect for physical damage. Look for dents, cracks, or signs of cutting.
- Perform a backpressure test. A mechanic can measure exhaust pressure before and after the converter.
Replacement Options
If you need to replace a catalytic converter, you have choices:
OEM Parts
Original equipment manufacturer (OEM) converters are made by Jeep’s supplier. They’re expensive but guaranteed to fit and work. Expect to pay $500–$1,500 per converter, plus labor.
Aftermarket Converters
Aftermarket converters are cheaper, usually $100–$400 each. They must be EPA-compliant for street use. Some states require CARB-approved converters (California). Check your local laws.
Used Converters
You can buy used converters from salvage yards. They’re cheaper but risky—you don’t know their condition. Only buy if you can test them or get a warranty.
Cost To Replace Catalytic Converters On A Jeep Grand Cherokee
Costs vary widely based on the number of converters and labor rates. Here’s a rough estimate:
- Two converters (V6 or standard V8): $1,000–$2,500 total
- Four converters (SRT8/Trackhawk): $2,500–$5,000 total
- Labor only: $200–$600 per converter
These prices include parts and labor. Dealerships charge more than independent shops. If you’re handy, you can replace the converters yourself to save money.
Preventing Catalytic Converter Theft
Since Jeep Grand Cherokees are common theft targets, take precautions:
- Park in a garage: If possible, keep your Jeep inside.
- Install a catalytic converter shield: These metal plates bolt under the vehicle to block access.
- Use a security cage: A welded cage around the converter makes it harder to cut.
- Engrave your VIN: Marking the converter with your vehicle identification number deters thieves.
- Install motion-activated lights: Bright lights scare off thieves at night.
Emissions And Legal Considerations
Replacing catalytic converters has legal implications. In the US, it’s illegal to remove or bypass a working converter. You must replace it with a compliant unit. Some states require emissions testing, and a missing converter will fail inspection.
If you’re in California or other CARB states, you need a converter with an executive order number. Aftermarket converters sold as “universal” may not be legal. Always check your state’s regulations.
DIY Replacement Guide
If you’re comfortable working on your Jeep, you can replace the converters yourself. Here’s a basic overview:
Tools Needed
- Jack and jack stands
- Socket set and wrenches
- Penetrating oil (like WD-40 or PB Blaster)
- Reciprocating saw or angle grinder (if bolts are rusted)
- New gaskets and bolts
- Safety glasses and gloves
Steps
- Let the exhaust system cool completely. Hot exhaust can cause burns.
- Jack up the vehicle and secure it on jack stands. Never work under a car supported only by a jack.
- Spray penetrating oil on all bolts and nuts. Let it soak for 15 minutes.
- Remove the oxygen sensors from the old converter. Use a special socket to avoid damage.
- Unbolt the converter from the exhaust manifold and the downstream pipe. If bolts are seized, cut them with a saw.
- Install the new converter with new gaskets. Use anti-seize on the bolts.
- Reinstall the oxygen sensors. Tighten them to spec (usually 30–40 ft-lbs).
- Start the engine and check for leaks. Listen for hissing sounds.
- Test drive the vehicle to ensure proper operation.
Frequently Asked Questions
How many catalytic converters does a 2015 Jeep Grand Cherokee have?
The 2015 Grand Cherokee with the 3.6L V6 or 5.7L V8 has two catalytic converters. The 6.4L SRT8 has four.
Can I drive my Jeep Grand Cherokee with a missing catalytic converter?
Yes, but it’s illegal in most areas. You’ll also hear a loud exhaust noise, lose power, and fail emissions tests. The check engine light will stay on.
How much does it cost to replace a catalytic converter on a Jeep Grand Cherokee?
For a standard two-converter setup, expect $1,000–$2,500. For SRT models with four converters, costs can exceed $4,000.
Are aftermarket catalytic converters legal for my Jeep Grand Cherokee?
Yes, as long as they are EPA-compliant. In California and other CARB states, you need a CARB-approved converter with an executive order number.
Why is my Jeep Grand Cherokee’s check engine light on after converter replacement?
This could be due to a faulty oxygen sensor, incorrect installation, or an incompatible converter. Double-check the sensor connections and ensure the converter is properly seated.
Final Thoughts
Knowing how many catalytic converters are in your Jeep Grand Cherokee is important for maintenance, repairs, and theft prevention. Most models have two, but performance variants like the SRT8 and Trackhawk have four. Always check your specific year and engine to be sure.
If you’re replacing a converter, consider OEM or quality aftermarket parts. Protect your investment with anti-theft measures. And if you’re not comfortable with DIY work, a trusted mechanic can handle the job.
Your Jeep Grand Cherokee’s exhaust system is designed to last 100,000 miles or more with proper care. Regular maintenance, like fixing engine misfires promptly, extends converter life. Keep an eye on the check engine light and address issues early to avoid costly repairs down the road.