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severe 17 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
An unexpected loss of drive power increases the risk of a crash.
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0300 - Multiple Cylinder Misfire - In Active or Stored status set during cold start catalyst heating. ● P0301 - Cylinder 1 Misfire - In Active or Stored status set during cold start catalyst heating. ● P0302 - Cylinder 2 Misfire - In Active or Stored status set during cold start catalyst heating. ● P0303 - Cylinder 3 Misfire - In Active or Stored status set during cold start catalyst heating. ● P0304 - Cylinder 4 Misfire - In Active or Stored status set during cold st
full bulletin at NHTSA ↗Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0111-00 - Intake Air Temperature Sensor 1 Circuit Range Performance Bank 1. (In Active or Stored status) ● P0071-00 - Ambient Air Temperature Sensor Performance. (In Active or Stored status) ● P0072-00 - Ambient Air Temperature Sensor Circuit "A" Low. (In Active or Stored status) ● P0073-00 - Ambient Air Temperature Sensor Circuit "A" High. (In Active or Stored status) ● P0011-00 - Bank 1 Camshaft 1 Position Timing Over Advanced Or. (In Active or Stored status) ● P2
full bulletin at NHTSA ↗WATER PUMP
full bulletin at NHTSA ↗WATER PUMP
full bulletin at NHTSA ↗Water Pump & Chain Case Cover
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The 2021 Grand Cherokee engine cluster shows recurring failures across multiple systems. Owners report sudden, unplanned shutdowns while driving at highway and city speeds—some with zero warning lights—that dealers cannot replicate. Several owners describe rapid oil loss between service intervals without visible leaks, attributed to a defective engine seal; service advisors mention class action lawsuits but no formal Chrysler recall.
Engine mounts are failing widespread enough that FCA has backorders and has reversed its initial denial, though it still won't recall the part. Oil coolers are leaking and allowing oil and coolant to mix, risking catastrophic engine damage. Owners report clamoring engine noise, cylinder misfires triggering P0304 codes, and the auto stop/start system shutting down vehicles randomly at lights and in traffic with no way to permanently disable it.
Fuel pump and water pump failures occur at relatively low mileage. A recall exists for some fuel pumps (22V554000), but parts are unavailable and the recall doesn't apply to all VINs. Many failures happen under 35,000 miles on brand-new vehicles. Dealers frequently cannot diagnose issues despite multiple visits, and Chrysler manufacturer notification is inconsistent across complaints.
Same Jeep Grand Cherokee engine reports on nearby years: 2018 · 2019 · 2020 · 2022 · 2023
Engine oil level drops significantly between service intervals despite no visible leaks or warning lights. Owners report being informed by service providers that the V6 Pentastar engine has a known defective seal issue causing rapid oil loss. Class action lawsuits exist but no formal recall has been issued.
When: Early in ownership, during routine oil changes
Symptoms owners cite: Oil level critically low between service intervals; No warning lights displayed; No visible external leaks
Repairs/costs cited: Owners report being advised that oil cooler components may need replacement; one narrative mentions oil cooler failure replacement at under 32,000 miles
Recalls/TSBs owners mention: Class action settlement mentioned; Chrysler reportedly aware of issue but no formal recall issued
Engine mounts fail, causing excessive movement and vibration. FCA initially denied the issue but later acknowledged it due to large backlogs. Certified mechanics indicate this is a safety hazard that can lead to engine shifting and component damage.
When: No specific mileage provided
Symptoms owners cite: Excessive engine movement; Vibration
Repairs/costs cited: Parts on major backorder with no delivery date; FCA has acknowledged the issue but denies it is safety-related
Recalls/TSBs owners mention: No recall issued; FCA states not a safety hazard despite mechanic disagreement
Engine shuts off without warning during highway or city driving at various speeds. No diagnostic codes appear even after dealer inspection. Restarts after brief pause but may shut off multiple times in short succession. Dealers unable to replicate under test conditions.
When: Varies: 200 miles, unknown mileage; recurring issue at 5 mph and 65 mph
Symptoms owners cite: Engine cuts out during driving; No warning lights before shutdown; Vehicle restarts after brief pause; May happen multiple times in succession
Repairs/costs cited: Dealers cannot diagnose; no repairs completed in multiple service visits
Recalls/TSBs owners mention: No manufacturer notification or response documented
Abnormal clamoring sound emits from engine on startup without warning. Initial repair involved replacing two camshafts and other engine parts; second visit resulted in replacing 18 engine parts total, with no resolution.
When: Approximately 24,000 miles
Symptoms owners cite: Abnormal clamoring sound from engine; Sound occurs on startup without warning
Repairs/costs cited: Two camshafts replaced on first visit; 18 engine parts replaced on second visit; issue unresolved
Recalls/TSBs owners mention: Manufacturer not notified; vehicle not repaired after multiple dealer attempts
Antifreeze and engine oil intermix in the antifreeze reservoir, triggering check engine light and cylinder misfire codes. This indicates potential oil cooler or adapter failure allowing fluid crossover.
When: No specific mileage provided
Symptoms owners cite: Check engine light illumination; Oil visible in coolant reservoir; Coolant in oil; Rough engine operation
Codes mentioned: P0304
Repairs/costs cited: Oil cooler filter adapter replacement and engine flush required
Start-stop function engages and shuts off the vehicle randomly while at traffic lights or during acceleration. System has on-off switch but resets with each ignition cycle, preventing permanent disabling. One owner also reports jerking during acceleration related to this system.
When: Early ownership at low mileage (200 miles, at 500 miles)
Symptoms owners cite: Random unplanned shutdowns at stops; Jerking during acceleration; Engine hesitation and stalling during driving; System indicator active despite attempts to disable
Codes mentioned: P0304
Repairs/costs cited: One owner reports software update attempted but failure recurred; others undiagnosed after multiple shop visits
Both fuel pump and water pump fail, preventing vehicle start and causing shutdown during operation. Water pump leaks coolant. Occurs at relatively low mileage in newer vehicle.
When: Approximately 70,000 miles; fuel pump relay delay also reported early in ownership
Symptoms owners cite: Vehicle will not start or turn over; Engine shuts off if it does start; Water pump leaking coolant; Delayed engine start response
Repairs/costs cited: Both fuel pump and water pump replacement needed; fuel pump recall does not apply to all VINs
Recalls/TSBs owners mention: Fuel pump recall exists (Campaign 22V554000) but parts availability delayed; does not apply to all VINs
Oil cooler leaks oil underneath vehicle. Slow leak with no warning lights or performance change initially. Creates oil coating under entire vehicle and risks coolant-oil mixing that could destroy engine.
When: Under 32,000 miles
Symptoms owners cite: Oil dripping from underneath vehicle; Burning smell after driving; Slow leak with no immediate warning
Repairs/costs cited: Oil cooler replacement required; one owner notes replacement was completed
Transmission slipping sensation at low speeds leads to diagnosis of multiple cylinder misfires. In one case, engine replacement was recommended at very low mileage. Related to check engine light and P0304 code.
When: Very early ownership (500 miles)
Symptoms owners cite: Transmission slip sensation at 30-45 mph; Multiple cylinder misfires diagnosed; Check engine light with P0304 code
Codes mentioned: P0304
Repairs/costs cited: Engine replacement recommended at 500 miles; repair pending
Recalls/TSBs owners mention: Manufacturer made aware; case filed
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
It's a meaningful issue. 17 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
Based on the 17 complaints filed, engine issues most often appear around 22,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Yes — 1 active recall(s) cover engine issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.