Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

1998 Cadillac DeVille Reliability ReportCommon Problems, Repair Costs & Expert Verdict

42/ 100

KeepScore

HIGH RISK

Grade: D-

A comfortable, powerful relic burdened by an infamous engine and complex, failure-prone systems, making it a money pit for the unprepared.

Full system breakdown + what I would do

Quick Facts · 1998 Cadillac DeVille

  • Has 3 NHTSA recalls on record — the most notable involves the air bags:side/window.
  • Scores 26 points below the strongest nearby year — the 1996 Cadillac DeVille earns a 68.
  • The system most likely to surface first: northstar engine (4.6l v8) (critical severity).

Should You Buy the 1998 Cadillac DeVille?

The 1998 Cadillac DeVille, while offering impressive comfort and V8 power, presents a significant financial gamble due to its notorious Northstar engine design. Its high likelihood of requiring expensive, specialized repairs for critical issues like head gaskets and oil leaks makes it a high-risk proposition for most buyers. Unless you possess deep mechanical expertise or a substantial repair budget, I strongly advise against this particular model year.

Biggest Strengths

  • Luxurious, comfortable ride quality
  • Strong acceleration from the Northstar V8 (when running well)
  • Advanced features for its era (e.g., Magnasteer, Continuously Variable Road Sensing Suspension)

Top Risk Areas

The systems that break first on the 1998 Cadillac DeVille. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

1
Northstar Engine (4.6L V8)critical
2
Electrical Systemmajor
3
Transmission (4T80-E)moderate
Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

NHTSA Recalls

3 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

AIR BAGS:SIDE/WINDOW

VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THE SIDE IMPACT SENSOR MODULES HAVE QUALITY PROBLEMS THAT CAN CAUSE AN INADVERTENT DEPLOYMENT OF THE DRIVER OR PASSENGER SIDE IMPACT AIR BAGS. THESE SIDE AIR BAGS DEPLOY WITH LESS FORCE THAN A FRONTAL AIR BAG AND ARE DESIGNED TO MINIMIZE THE RISK OF SERIOUS INJURY.

VEHICLE SPEED CONTROL

VEHICLE DESCRIPTION: PASSENGER VEHICLES, HEARSES AND LIMOUSINES. THE CANISTER PURGE EVAPORATIVE EMISSIONS HARNESS ON THESE VEHICLES WAS MISROUTED.

What breaks on the 1998 Cadillac DeVille?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

OwnerKeep Passport · $499 · one-time

Just bought a 1998 Cadillac DeVille? Keep it that way.

Snap a receipt — AI logs it. Build an OwnerScore. Sell with a buyer-ready Passport dossier.

Cadillac DeVille by Year

Compare KeepScores across nearby years of the Cadillac DeVille. Click any year for its full report.

If You're Considering This, Also Look At

Similar class, similar year range — ranked by KeepScore.

Relevant Products for Your 1998 Cadillac DeVille

Parts and accessories matched to your 1998 Cadillac DeVille

As an Amazon Associate I earn from qualifying purchases.

Frequently Asked Questions

Full Report

1998 Cadillac DeVille

7-system breakdown, mileage danger zones, repair cost projections, buyer checklist, and expert verdict.

Instant delivery · No account

Complete Owner's Guide

Already own one? Get the 13-chapter owner's guide with specs, service schedules, and fluid capacities.

Compare This Vehicle

Final Step

Know every issue before you sign.

A $4.99 reliability report can catch a $3,000 problem. Full breakdown for the 1998 Cadillac DeVille — delivered in under 60 seconds.

OwnerKeep Passport

Just bought a 1998 Cadillac DeVille? Keep it that way.

OwnerKeep Passport turns your Cadillac DeVille's care history into a luxury digital vault — AI-logged receipts, an OwnerScore that pays at resale, and a buyer-ready dossier in one tap.

  • AI receipt OCR — snap and log
  • Fuel & mileage tracker
  • Tri-Score OwnerScore
  • One-tap resale dossier PDF
$499 · one-time · lifetime access · no subscription