The 2017 Grand Cherokee is a capable platform undermined by serious powertrain reliability issues, particularly the ZF 8-speed transmission and catastrophic EcoDiesel engine failures. The 3.6L Pentastar is the most dependable option, though none are immune to electrical gremlins and fuel system issues.
ZF 8-Speed Transmission Failure (Oil Cooler & Valve Body)
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Harsh shifting or delayed engagement, especially when cold, Transmission overheating warning on dash, Limp mode or stuck in one gear, Metal shavings in fluid at service intervals
Fix: Oil cooler clogs and contaminates the transmission, requiring cooler replacement, fluid flush, and often valve body replacement. Full rebuild or replacement needed if delayed. 8-12 hours labor for cooler/valve body; 15-20 hours for rebuild.
Estimated cost: $2,500-6,500
3.0L EcoDiesel Catastrophic Engine Failure
Occasional · high severityTypical onset: 80,000-140,000 mi
Symptoms: Excessive oil consumption (quart per 1,000 miles or worse), White or blue smoke on startup, Sudden loss of power with knocking noise, Check engine light with misfire codes or low compression
Fix: Crankshaft and main bearing failures destroy the bottom end. EGR cooler failures dump coolant into cylinders. Requires complete engine rebuild or replacement. 25-35 hours labor for rebuild; 18-24 hours for used engine swap.
Estimated cost: $8,000-15,000
TIPM (Totally Integrated Power Module) Failures
Common · medium severitySymptoms: Random no-start conditions with adequate battery voltage, Horn honking on its own or wipers running randomly, Fuel pump not priming (no audible whir at key-on), Intermittent gauge cluster warnings that disappear
Fix: The TIPM controls most electrical loads and fails due to internal relay corrosion. Replacement is straightforward but part is expensive. Some independent shops offer rebuilds. 2-3 hours labor for R&R and programming.
Estimated cost: $800-1,800
Radiator Fan Control Module & Overheating
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Engine temperature climbing in traffic or at idle, Cooling fans not running when engine is hot, Check engine light with fan control circuit codes, AC performance degraded in hot weather
Fix: Fan control module mounted near radiator fails from heat cycling. Sometimes the fan clutch itself seizes. Module replacement 1.5-2 hours; fan assembly 2-3 hours if needed.
Estimated cost: $400-1,200
Upper Control Arm Ball Joint Separation
Occasional · high severityTypical onset: 80,000-130,000 mi
Symptoms: Clunking over bumps from front suspension, Wandering steering or alignment won't hold, Visible play when inspecting ball joint with pry bar, Uneven tire wear on inside edge
Fix: Ball joints are pressed into control arms and fail prematurely, especially with off-road use. Complete upper control arm replacement required (joints not sold separately for most applications). 2-3 hours per side including alignment.
Estimated cost: $600-1,200
Fuel Pump Failure (All Engines)
Common · high severityTypical onset: 70,000-120,000 mi
Symptoms: Intermittent no-start requiring multiple key cycles, Engine stalling at idle or under load, Loss of power on acceleration or hills, Whining noise from fuel tank area
Fix: In-tank fuel pump assemblies fail, especially on vehicles run low on fuel frequently. EcoDiesel has separate lift pump that also fails. Requires tank drop. 3-4 hours labor for gasoline; 4-5 hours for diesel including filter.
Estimated cost: $800-1,800
Exhaust Manifold Cracking (5.7L Hemi)
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Ticking noise from engine bay that worsens when cold, Exhaust smell in cabin with heat on, Visible soot around manifold-to-head junction, Check engine light with O2 sensor codes
Fix: Cast manifolds crack between ports due to heat cycling. Aftermarket tubular headers are upgrade option. 6-8 hours labor per side due to tight clearances and seized studs.
Estimated cost: $1,200-2,500
Avoid the EcoDiesel entirely; if you must buy one, get the 3.6L Pentastar with service records proving religious transmission maintenance and budget heavily for eventual repairs.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.