2021 Ram 1500 Pre-Purchase Inspection Checklist
Known Issues — 2021 Ram 1500
CRITICAL
5.7L HEMI MDS lifter failure
CRITICAL
3.0L EcoDiesel DEF system sensor failures
MODERATE
Uconnect 8.4/12.0 infotainment freeze
MODERATE
eTorque 48V belt-alternator starter issues
MODERATE
Air suspension compressor failure
MINOR
Wireless CarPlay connectivity drops
What to Inspect
- On 5.7 HEMI — check for MDS lifter tick at idle
- On EcoDiesel — scan DEF system for fault codes
- Test Uconnect 12.0 for crashes or lag
- On eTorque — check 48V system fault codes
- Test air suspension if equipped
- Test wireless CarPlay
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Oil change (synthetic) | every 8,000 miles | $70-$110 |
| Transmission fluid service | every 60,000 miles | $200-$320 |
| Spark plugs (HEMI) | every 60,000 miles | $250-$400 |
| Rear differential fluid | every 45,000 miles | $100-$160 |
| Transfer case fluid (4WD) | every 60,000 miles | $100-$150 |
| DEF fluid refill (Diesel) | every 8,000 miles | $25-$50 |
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