Valve Body. These may cause over drive cycling.
full bulletin at NHTSA ↗2008 Jeep Grand Cherokee engine problems
moderate 77 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
77
Recalls
0
Avg fix
$3,100
1injury
When does it fail?
Of the 77 engine complaints filed for the 2008 Jeep Grand Cherokee, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 77 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA engine complaint has been filed on this vehicle in over 13 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
NAG1 (5A580) Valve Body As per Warranty Bulletin D-13-22, please use R2108213A$ valve body for all Warranty (W), Mopar (M) and Mopar Vehicle Protection (F) claims.~ Assembly also includes Filter (52108325AA) and Gasket (52108332AA).~
full bulletin at NHTSA ↗Part Description: 5.7L Long Block Issue Description: This 5.7L Long Block Assembly is compatible with both EGR and Non-EGR applications. An EGR Block-Off Plate (53032739AA) must be ordered when installing this Long Block Assembly in a Non-EGR application. Unless, the EGR Block-Off Plate is being transferred from the old engine.
full bulletin at NHTSA ↗Part Description: 5.7L Long Block Issue Description: This 5.7L Long Block Assembly is compatible with both EGR and Non-EGR applications. An EGR Block-Off Plate (53032739AA) must be ordered when installing this Long Block Assembly in a Non-EGR application. Unless, the EGR Block-Off Plate is being transferred from the old engine.
full bulletin at NHTSA ↗Part Description: Valve Body Assembly Issue Description: Valve body design was changed between 2010MY and 2011MY applications. To prevent mix matching valve bodies and solenoid packs the connectors are color coded.~ Valve bodies with a white connector can be used on 2010, 2009, 2008..., model years. Valve bodies with a gray connector can only be used on 2011, 2012, 2013..., model years.~ Solenoid packs with a white connector are used with 2010, 2009, 2008..., model years. Solenoid packs with a gray connector are used with 2011, 2012, 2013..., model years.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Engine stalling dominates these 77 complaints. Owners describe the vehicle dying without warning at highway speeds (55–75 mph) or sitting at stop lights, with no check engine light and no stored fault codes—a combination that leaves dealerships baffled. Many incidents occur after dealership repairs: replaced crankshaft sensors, FCM modules, throttle bodies, PCM controllers, MAP sensors, and even entire engine wiring harnesses, yet stalling continues. When the engine dies, drivers lose power steering and brakes, creating dangerous coasting situations on highways and in intersections. Equally concerning are intermittent no-start conditions and total power-loss events where all electrical systems shut down simultaneously—radio, dash lights, odometer—then mysteriously return. A February 2008 recall addressed a manufacturing defect in the Front Control Module (1,338 vehicles), and a 2014–2015 ignition switch recall followed, but many owners report their VINs don't appear in the recall database despite experiencing identical symptoms. Water pump bearing failure and coolant system leaks have caused engine seizures. Several owners mention Chrysler dealerships replacing multiple wiring harnesses on 2007–2008 Grand Cherokees for the same issue, yet no comprehensive fix or TSB is apparent. Throttle surge, rough idle, and starter circuit failures round out the electrical and control gremlins owners are fighting with little support from the manufacturer.
Same Jeep Grand Cherokee engine reports on nearby years: 2005 · 2006 · 2007 · 2009 · 2010
Failure modes owners describe
Intermittent stalling while driving
Engine shuts down unpredictably at various speeds (0-75 mph), often without warning lights or stored diagnostic codes. Vehicle typically restarts after stopping and cycling the key to off, but stalling can recur repeatedly.
When: Most reported between 5,000-66,000 miles; many incidents occurring on highways at 55-75 mph and at traffic stops
Symptoms owners cite: Engine dies without warning; No check engine light or diagnostic codes stored; Loss of power steering and brakes when stalled; RPM drops or engine shuts completely; Stalling occurs randomly at any speed; Vehicle restarts normally after key cycling
Repairs/costs cited: Dealerships unable to replicate; replaced wireless ignition node, throttle body, crankshaft sensor, engine wiring harness, FCM (Front Control Module), PCM (Powertrain Control Module), MAP sensor, coil packs, final drive control module; software updates attempted with limited success
Recalls/TSBs owners mention: February 2008 recall for FCM (1,338 vehicles); ignition switch recall (2014-2015) for some VINs; dealers reported replacing multiple wiring harnesses on 2007-2008 Grand Cherokees
No-start condition
Vehicle cranks but will not start, or exhibits extended cranking before starting. Condition is intermittent and typically resolves within 24-48 hours without repair. Often associated with loose ignition switch or faulty wiring harness.
When: Reported at various mileages; some incidents after service intervals
Symptoms owners cite: Key will not turn ignition properly or wiggle in ignition; Engine cranks but does not fire; Fuel pump activates but engine won't start; No fault codes present; Condition resolves spontaneously within 24-48 hours; Battery drains intermittently
Repairs/costs cited: Engine wiring harness replaced; battery replacement required in some cases; ignition switch service related to heavy key causing loose fit
Recalls/TSBs owners mention: 2014-2015 ignition switch recall announced; not all VINs qualified for recall despite identical symptoms
Loss of electrical power while driving
Complete or near-complete loss of electrical power while driving at various speeds. Dash lights, radio, odometer, climate control, and power steering all fail simultaneously. Power typically returns after vehicle is stopped and restarted.
When: Reported on highways at 65-75 mph and city streets at 10-35 mph; typically resolves within minutes to an hour
Symptoms owners cite: All electrical systems lose power simultaneously; Dashboard lights go dark; Radio shuts off; Odometer display blanks; Power steering lost; Loss occurs suddenly without warning; Power returns after restart
Repairs/costs cited: No repairs documented; dealers unable to diagnose or replicate
Sudden unintended acceleration with brake failure
Vehicle accelerates to full throttle without driver input. Accelerator pedal physically moves downward to full throttle and will not respond to pump attempts. Braking is ineffective and vehicle comes to very slow stop. Requires turning off ignition to stop engine.
When: Reported on freeway onramp at time of incident
Symptoms owners cite: Vehicle accelerates to full throttle unintended; Accelerator pedal moves downward automatically; Throttle will not respond to pump attempts; Brakes function improperly or fail; Vehicle maintains high RPM even in neutral; Engine continues at extreme RPM until ignition turned off
Repairs/costs cited: Throttle module and brake module replaced per Chrysler Service Center recommendation; dealer would not confirm proper repair
Recalls/TSBs owners mention: Chrysler Service Center recommended throttle and brake module replacement
Water pump bearing failure with rapid coolant loss
Internal water pump bearing breaks, causing shaft movement and flywheel disintegration. Results in rapid coolant loss within 15-20 minutes and engine seizure. Check engine light illuminates before failure.
When: Reported at 8,000+ miles on vehicle
Symptoms owners cite: Check engine light illuminates; Steam from under hood; Rapid coolant loss (15-20 minutes); Engine stalls from overheating; Loss of steering power; Engine seizure due to lack of coolant circulation
Repairs/costs cited: Engine replacement required; manufacturer not interested in inspecting failed components for design evaluation
Recalls/TSBs owners mention: Jeep hotline: warranty expired, no support offered, refused to accept photos or physical parts for quality assurance review
Rough idle and stall tendency
Engine idles roughly and feels as though it will stall. Vehicle shakes, vibrates, or surges while at stop. Symptoms worsen without air conditioning on. Rear view mirror misalignment reported concurrently.
When: Reported early in ownership; failure mileage around 5,500-11,700
Symptoms owners cite: Rough idle; Shaking and vibration at stop; Surging forward sensation; Feels like engine will stall; Symptoms worse without A/C on; Jerking motion almost caused crash
Repairs/costs cited: PCM programming attempted; five dealership visits for shaking issue with no resolution
Recalls/TSBs owners mention: Dealer explanation: A/C compressor cycling and cooling fans cycling simultaneously causes issue (not confirmed as cause)
Hard start when parked
Vehicle difficult to start when parked for extended time. May require multiple start attempts or eventually starts after sitting. Often accompanied by stalling at driving speeds.
When: Reported around 74,000 miles and other high-mileage intervals
Symptoms owners cite: Hard to start when vehicle has been parked; Multiple start attempts required; Starter and battery suspect but often test normal; Condition intermittent
Repairs/costs cited: Starter and battery replaced at independent shop; crankshaft sensor and engine wiring harness replaced at dealer
Engine stalling during deceleration
Engine shuts off specifically when throttle is closed during deceleration, such as when exiting highway or slowing for traffic. Condition is non-repeatable and diagnostic system stores no fault codes.
When: First encountered at 14,000 miles; persistent to 46,000 miles
Symptoms owners cite: Engine stops when throttle closes during deceleration; No warning indicators; No stored fault codes; Non-repeatable at dealership; Loss of power steering and braking assistance
Repairs/costs cited: Five dealership visits for diagnosis; no successful repair completed; Chrysler Customer Service could not assist
Recalls/TSBs owners mention: Chrysler Customer Service contacted but provided no assistance or solutions
Starter circuit malfunction
Starter solenoid clip detaches from solenoid connector, preventing vehicle from starting. Clip must be manually pushed back onto solenoid to allow starting. Recurs on multiple occasions.
When: Reported at 60,000 miles
Symptoms owners cite: Vehicle will not start without warning; Solenoid connector clip detached; Requires manual clip replacement to start vehicle; Causes hand burns when clip is hot
Repairs/costs cited: Starter wiring harness and connector clip replacement required but not completed by dealer
Recalls/TSBs owners mention: Manufacturer made aware; no response documented
Engine completely seized
Engine becomes completely rigid and immobile. Cannot be turned by hand or starter motor. Occurs after stall event in traffic. Starter and battery replacement insufficient to resolve.
When: Reported after vehicle stopped in traffic
Symptoms owners cite: Engine completely seized and stiff; Cannot be cranked by starter; Cannot be turned by hand; Follows stall event
Repairs/costs cited: New starter and battery installed but engine remains seized; no resolution provided
Recalls/TSBs owners mention: Dealer reported widespread issue at multiple Jeep dealerships with same problem; manufacturer (Mopar) refused to help
Throttle surge and idle dropout
While stopped at traffic light, engine suddenly revs to high RPM with foot on brake. Tachometer surges then returns to normal idle. Later develops idle dropout where idle drops momentarily and vehicle feels like it will stall.
When: Two surge incidents within first 11 months of ownership
Symptoms owners cite: Sudden unintended throttle surge while braking; RPM spikes without driver input; Returns to normal idle after surge; Later: idle drops and vehicle feels it will stall; No diagnostic codes present on computer
Repairs/costs cited: No repairs completed; dealer found no computer codes or technical bulletin
Recalls/TSBs owners mention: Dealer called Chrysler; told no one reported throttle surge issue and no technical bulletin issued
Cold engine valve train noise
Loud engine noise when first started, most noticeable in cold weather. Noise does not increase with engine RPM but subsides as engine warms. Consistent with valve train chatter from hydraulic lifter pump-up delay due to cold oil viscosity.
When: Most pronounced in cold weather conditions
Symptoms owners cite: Loud valve train noise on cold start; Noise more pronounced in cold weather; Noise subsides with warm-up; Noise does not correlate with RPM; Sounds like mechanical lifter adjustment needed
Repairs/costs cited: Synthetic oil (Mobil 1) change attempted but appeared to increase noise
Flooded engine from high water
Vehicle stalled in 8 inches of flood water. Upon restart, engine smoked and burned. Air conditioner running drew water into engine through intake. Multiple modules burned out. Vehicle totaled despite trail-rated designation.
When: Reported at 8,000+ miles during torrential downpour
Symptoms owners cite: Vehicle stalled in 8-inch flood water; Smoke and burning smell on restart attempt; Water in air filter; Multiple electronic modules burned out
Repairs/costs cited: Vehicle totaled; total loss to insurance
Recalls/TSBs owners mention: Insurance adjuster indicated A/C operation caused water intake into engine
Shifter stuck in park
Gear shifter becomes stuck in park position and will not shift to reverse. Vehicle unable to be driven after stall event. No response to multiple restart or shift attempts.
When: Reported at 2,355 miles after engine stall
Symptoms owners cite: Shifter stuck in park; Will not shift to reverse; No response after restart; Difficulty getting vehicle out of gear; Follows engine stall event
Repairs/costs cited: No repairs completed on multiple dealer visits
Loose grounding cable causing stall
Vehicle stalls at 60 mph with check engine and traction control lights illuminating. Grounding cable discovered loose. Repair made but failure recurs intermittently. Subsequent dealer visit unable to diagnose or repair.
When: Reported at 44,000 miles; recurred at 45,014 miles
Symptoms owners cite: Engine stalls while driving 60 mph; Check engine and traction control lights illuminate; Intermittent recurrence after repair attempt; Multiple stalling incidents (four in one month)
Repairs/costs cited: Grounding cable tightened initially but problem recurred; subsequent visits found no diagnosis
Oil intake tube leak
Oil intake tube leaks oil directly into intake air manifold and engine. Check engine light illuminates. Intake manifold and air intake hose require replacement. Diesel engine affected.
When: Reported at 106,726 miles on diesel model
Symptoms owners cite: Check engine light illuminates; Oil leak from intake tube into manifold; Oil flowing into engine; Internal engine damage from oil ingestion
Repairs/costs cited: Intake manifold and air intake hose replacement scheduled; manufacturer offered to pay one-third of repair costs
Recalls/TSBs owners mention: Manufacturer notified; offered to pay one-third of repair costs
Multiple electrical component intermittent failure
Various electrical systems fail sporadically while driving: interior and exterior lighting, HVAC, turn signals, windshield wipers all fail independently and intermittently. Vehicle stalls during left turn attempt. Dealer unable to diagnose any failure.
When: Reported at 10,000 miles
Symptoms owners cite: Interior lighting fails sporadically; Exterior lighting fails sporadically; HVAC fails sporadically; Turn signals fail sporadically; Windshield wipers fail sporadically; Engine stalls without warning during turn
Repairs/costs cited: Dealer unable to diagnose or repair any failure
Low oil pressure causing engine noise and knocking
Engine suddenly develops shuddering, lunging, terrible knocking and starving-for-fuel symptoms. Oil pressure only one pound when checked at dealership. Lifter failure suspected. Vehicle in dealership two weeks with no answers.
When: Sudden onset during normal driving
Symptoms owners cite: Shuddering and lunging action; Terrible knocking noise; Engine sounds like starving for fuel; Low oil pressure (one pound recorded); No change after adding oil to proper level; Slow driving difficult
Repairs/costs cited: Dealership servicing for two weeks without diagnosis or solution; lifter problem suspected
Power loss and hesitation at low speeds
Diesel engine exhibits power loss and hesitation, particularly at low speeds when accelerating into traffic. Problem progressive and gets worse. Vehicle idles fine but sputters on acceleration. Computer stores no codes for diagnosis.
When: Ongoing issue affecting multiple driving scenarios
Symptoms owners cite: Power loss at low speeds; Hesitation on acceleration; Sputtering when accelerating into traffic; Progressive worsening; Idles normally; Unpredictable occurrence; No diagnostic codes present
Repairs/costs cited: No repairs documented; serious safety issue identified
Synthesized from 77 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
The engine stalls intermittently from time to time shutting the car down. It usually happens while coming to a stop or at rest. In september of 2012 it happened on the highway going at 65 MPH and I had to bring the vehicle to the curb to restart it. It always restarts easily. I have taken it to the dealer and they can not figure it out. *tr
Sudden acceleration/ loss of brakes. Vehicle accelerated to full throttle while entering from freeway onramp. The driver took foot off accelerator and vehicles accelerator pedal continued to move downward to full throttle and would not decelerate after an attempt to "pump" the accelerator pedal to try and get the pedal to release. The automobile was then put in neutral and the engine would not…
Car randomly shuts off for unknown reason. So far only while stationary in traffic .idle rpms drop suddenly causing car to stall. Vehicle can be restarted no lights or code indications .has occurred 3 times over 3 months dealer cleaned fuel system. Problem still exists
Had engine trouble with your 2008 Jeep Grand Cherokee?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2008 Jeep Grand Cherokee?
It's a documented issue but not catastrophic. 77 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 72 complaints that reported odometer mileage, most engine failures cluster between 31,000 and 82,000 miles, with the median around 60,000. A quarter of owners report trouble before 31,000; a quarter make it past 82,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
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.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2008/Jeep/Grand Cherokee.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.