Maintenance Schedule 2026 Jeep Wrangler Unlimited · 3.0L V6
Normal Service Severe Service
The 2026 Jeep Wrangler Unlimited 3.0L V6 EcoDiesel follows a traditional diesel maintenance schedule with emphasis on fuel filter changes, DEF fluid monitoring, and extended service intervals for most fluids.
💡 Tap any service to log completion + findings to your garage, or jump to a how-to.
⚙️ Engine
Engine oil and filter
5,000 mi / 6 mo
OLP recommends 5,000 mi even when manufacturer claims longer — extended-interval programs shorten engine life. Use 5W-30 or 0W-30 full synthetic meeting FCA MS-11106 spec.
+ Log completion · How-to →
Fuel filter water separator drain
10,000 mi / 12 mo
Drain water from fuel/water separator; more frequently if warning lamp illuminates.
+ Log completion · How-to →
Fuel filter
20,000 mi / 24 mo
Critical for diesel fuel system longevity; may need more frequent replacement with lower-quality fuel.
+ Log completion · How-to →
Serpentine drive belt inspection
20,000 mi / 24 mo
Replace if cracked, frayed, or glazed; typically lasts 60,000-100,000 miles.
+ Log completion · How-to →
Fuel tank cap and lines inspection
20,000 mi / 24 mo
Check for damage or leaks.
+ Log completion · How-to →
Engine air filter
30,000 mi / 36 mo
Inspect at each oil change; replace sooner in dusty conditions.
+ Log completion · How-to →
🔩 Drivetrain
Driveshaft and CV joint inspection
20,000 mi / 24 mo
Check for torn boots, play, or noise.
+ Log completion · How-to →
Transmission fluid and filter
60,000 mi / 60 mo
8-speed automatic (8HP75); use only ZF Lifeguard 8 or equivalent ATF+4.
+ Log completion · How-to →
Transfer case fluid
60,000 mi / 60 mo
MP3025 or MP3026 transfer case depending on trim.
+ Log completion · How-to →
Front differential fluid
60,000 mi / 60 mo
+ Log completion · How-to →
Rear differential fluid
60,000 mi / 60 mo
Use 75W-85 or 75W-90 synthetic gear oil; limited-slip additive if equipped with Trac-Lok.
+ Log completion · How-to →
🛞 Brakes
Brake system inspection
10,000 mi / 12 mo
Inspect pads, rotors, calipers, hoses, and parking brake.
+ Log completion · How-to →
Brake fluid
40,000 mi / 48 mo
Use DOT 4 fluid only; flush and replace.
+ Log completion · How-to →
💧 Fluids
Cooling system hoses and clamps inspection
40,000 mi / 48 mo
Check for leaks, cracks, and proper tension.
+ Log completion · How-to →
Engine coolant
150,000 mi / 120 mo
First change at 100K miles or 10 years, then every 150K/10 years. Use OAT (Organic Additive Technology) coolant only.
+ Log completion · How-to →
🛞 Tires
Tire rotation
5,000 mi / 6 mo
+ Log completion · How-to →
Four-wheel alignment check
20,000 mi / 24 mo
Or sooner if uneven tire wear or handling changes are noticed.
+ Log completion · How-to →
🔍 Inspection
Suspension and steering inspection
10,000 mi / 12 mo
Inspect ball joints, tie rods, control arms, shocks, and bushings.
+ Log completion · How-to →
Underbody flush and inspection
10,000 mi / 12 mo
Especially important in winter or off-road conditions to remove salt and debris.
+ Log completion · How-to →
⚡ Electrical
Battery and charging system inspection
20,000 mi / 24 mo
Clean terminals; check voltage and load test.
+ Log completion · How-to →
💨 Exhaust
Exhaust system inspection
20,000 mi / 24 mo
Check for leaks, damage, and secure mounting.
+ Log completion · How-to →
EGR system inspection
67,500 mi / 72 mo
Check EGR valve and cooler for carbon buildup; clean or replace as needed.
+ Log completion · How-to →
DEF (Diesel Exhaust Fluid) top-off
as needed
Monitor and refill as needed; typically every 5,000-10,000 miles depending on driving conditions.
+ Log completion · How-to →
DPF (Diesel Particulate Filter) regeneration
as needed
Automatic process; ensure regular highway driving to facilitate passive regeneration. Service if warning lamp appears.
+ Log completion · How-to →
❄️ HVAC
Cabin air filter
20,000 mi / 24 mo
+ Log completion · How-to →
About this schedule: AI-generated to match the manufacturer's published recommendations for this exact engine. Severe-service intervals apply if you frequently make short trips, drive in dusty conditions, tow, or deal with extreme heat or cold. Always consult your owner's manual for warranty-required services.