Table of Contents : 2018-2020 Buick Regal Repair Manual

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2018-2020 Buick Regal: Comprehensive Guide

Overview

The 2018-2020 Buick Regal represents the sixth generation of Buick’s midsize sedan/sportback, built on GM’s E2XX platform. Available as a sleek five-door Sportback or wagon-style TourX, it offered European styling with American comfort. Production ended in 2020 as Buick shifted focus to SUVs and crossovers.

Body Styles & Trim Levels

• Regal Sportback: Preferred, Essence, Avenir, GS
• Regal TourX: Essence, Preferred, Avenir (wagon with standard AWD)

Technical Specifications

Top 10 Mechanical & Electrical Issues

1. Turbocharger Failure (2.0L Engine)

Symptoms: Loss of power, excessive oil consumption, blue/white smoke from exhaust, check engine light, turbo whine or whistle
Root Cause: Carbon buildup on intake valves (direct injection engines), oil starvation, failed turbo seals
Fix: Turbocharger replacement, intake valve cleaning
Cost: $1,500-$3,000

2. Transmission Jerking/Hesitation

Symptoms: Hard shifts, hesitation during acceleration, clunking when shifting, transmission slipping
Root Cause: Software calibration issues, torque converter problems, valve body wear
Fix: Transmission software update, torque converter replacement, valve body replacement
Cost: $150-$400 (software update), $1,200-$3,500 (hardware replacement)

3. Infotainment System Freezing/Rebooting

Symptoms: Black screen, system crashes, touchscreen unresponsive, Bluetooth connectivity issues, navigation failure
Root Cause: Software bugs in IntelliLink system, corrupt system files, hardware module failure
Fix: Software update, system reset, infotainment module replacement
Cost: $0-$200 (update), $800-$1,500 (module replacement)

4. Timing Chain Stretch (Higher Mileage)

Symptoms: Rattling noise on cold start, check engine light (P0016, P0017 codes), rough idle, loss of power
Root Cause: Inadequate lubrication, extended oil change intervals, design weakness in early production
Fix: Timing chain, guides, and tensioner replacement
Cost: $2,000-$3,500

5. Electronic Parking Brake Failure

Symptoms: “Service parking brake” message, brake won’t engage/release, grinding noise, brake stuck on
Root Cause: Caliper motor failure, corroded cables, software glitch, parking brake module failure
Fix: Parking brake actuator/caliper replacement, software recalibration
Cost: $400-$900 per side

6. Coolant Leak from Turbo Coolant Lines

Symptoms: Sweet smell, visible coolant puddles, overheating, low coolant warning light
Root Cause: Deteriorated coolant hoses to/from turbocharger, failed turbo coolant feed line connections
Fix: Replace turbo coolant lines and connections
Cost: $300-$700

7. Battery Drain/Electrical System Issues

Symptoms: Dead battery after sitting, parasitic draw, electrical accessories malfunctioning, won’t start
Root Cause: Faulty body control module, OnStar module staying active, aftermarket accessories, failing alternator
Fix: Module software update, component replacement, parasitic draw diagnosis and repair
Cost: $150-$500 (diagnosis/software), $400-$1,200 (module replacement)

8. Fuel Injector Failure

Symptoms: Rough idle, misfires, check engine light, poor fuel economy, hard starting
Root Cause: Carbon buildup (direct injection), injector coking, contaminated fuel
Fix: Fuel injector cleaning or replacement, intake valve cleaning service
Cost: $400-$800 (cleaning), $1,000-$1,800 (injector replacement)

9. Power Steering Assist Fault

Symptoms: “Service power steering” warning, heavy steering, intermittent power assist loss
Root Cause: Electric power steering motor failure, steering sensor issues, software calibration
Fix: Steering motor replacement, sensor replacement, software update
Cost: $800-$1,800

10. Suspension Noise/Strut Mount Failure

Symptoms: Clunking over bumps, rattling from front end, poor handling, uneven tire wear
Root Cause: Worn strut mounts, deteriorated bushings, failed control arm bushings
Fix: Strut mount replacement, control arm bushing replacement, complete strut assembly replacement
Cost: $400-$900 (strut mounts), $600-$1,200 (complete struts)

Top Competitors

The 2018-2020 Buick Regal competed in the midsize sedan and hatchback/wagon segment. It had two main variants:

• Buick Regal Sportback (hatchback-style sedan)
• Buick Regal TourX (wagon)

Here are its key competitors:

Midsize Sedans (Competitors to the Regal Sportback)

1. Honda Accord – A top-selling midsize sedan with strong reliability, efficiency, and turbocharged engine options.
2. Toyota Camry – Known for reliability, available AWD (from 2020), and sporty TRD variant.
3. Mazda6 – Sporty handling, premium interior, and stylish design.
4. Nissan Altima – Offers available AWD and a VC-Turbo engine.
5. Hyundai Sonata – Features bold styling, hybrid option, and tech-focused interior.
6. Kia K5 (Optima before 2021) – Turbocharged engines, AWD option, and modern design.
7. Volkswagen Arteon – A premium, sleek hatchback similar to the Regal Sportback.

Station Wagons (Competitors to the Regal TourX)

1. Subaru Outback – The closest competitor, offering AWD, rugged styling, and reliability.
2. Volvo V60/V90 Cross Country – Luxury wagons with Scandinavian design and AWD.
3. Audi A4 Allroad – A premium AWD wagon with upscale interior and turbo power.

Entry-Level Luxury Cars (Premium Alternatives)

1. Acura TLX – A sportier premium alternative with AWD available.
2. Lexus ES – Focused on luxury and comfort with a hybrid option.
3. Genesis G70/G80 – Sporty luxury sedans with strong performance and features.

Top 10 Recalls, Advisories & TSB Highlights

Recalls

1. NHTSA 19V-120 – Rearview camera may not display properly, affecting backup safety
2. NHTSA 18V-570 – Seat belt pre-tensioner may not properly deploy in a crash
3. NHTSA 19V-708 – Brake pedal pin may fracture, leading to loss of braking ability
4. NHTSA 20V-063 – Fuel pump module may fail, causing engine stall

Technical Service Bulletins (TSB)

5. #18-NA-355 – Infotainment system freezing/rebooting – software update available
6. #19-NA-082 – Transmission shift quality issues – updated calibration software
7. #18-NA-214 – Turbocharger oil consumption concerns – inspection and potential replacement
8. #19-06-03-001 – Excessive engine oil consumption – piston ring replacement under certain conditions
9. #18-08-44-002A – Sunroof wind noise – seal adjustment procedure
10. #PI1392A – Body control module software update for battery drain issues

Always check with a Buick dealer using your VIN to see if any outstanding recalls apply to a specific vehicle.

Maintenance Schedule

Every 7,500 Miles or 12 Months

• Engine oil and filter change
• Tire rotation
• Visual inspection of brakes, hoses, belts

Every 15,000 Miles

• Cabin air filter replacement
• Inspect brake pads and rotors

Every 30,000 Miles

• Engine air filter replacement
• Inspect suspension components
• Inspect coolant system

Every 45,000 Miles

• Transmission fluid inspection (change if necessary)
• Spark plug inspection (2.0T)

Every 60,000 Miles

• Spark plugs replacement (2.0T – critical for direct injection engines)
• Coolant flush and replacement
• Brake fluid replacement
• Drive belt inspection/replacement

Every 97,500 Miles

• Spark plugs replacement (3.6L V6)
• Transmission fluid change (if not done earlier)

Every 150,000 Miles

• Timing chain inspection (consider replacement if noisy)

Note: Follow severe service intervals if you do frequent short trips, towing, or drive in extreme conditions (oil changes every 5,000 miles recommended).

10 FAQs for Buyers

1. Is the 2018-2020 Buick Regal reliable?
Moderately reliable. It’s generally dependable but has some known issues with turbochargers, transmissions, and electronics. Reliability ratings are average compared to Japanese competitors like Honda and Toyota.

2. Should I buy the 2.0L Turbo or 3.6L V6?
The 2.0L turbo offers better fuel economy and adequate power for most drivers. The V6 (GS only) provides more power but lower MPG. The turbo engine has more reported issues with carbon buildup and turbocharger problems.

3. Is AWD worth it?
If you live in snowy climates or want the TourX wagon, yes. AWD adds capability but reduces fuel economy slightly. The TourX comes standard with AWD and offers excellent all-weather performance.

4. What’s the difference between Sportback and TourX?
Sportback is a sleek five-door liftback sedan; TourX is a wagon with more ground clearance (5.3″ vs 4.7″), standard AWD, more cargo space, and roof rails. TourX is better for active lifestyles.

5. How expensive is maintenance?
Moderate to expensive. Premium fuel is required for the 2.0T. Parts and labor are more expensive than mainstream brands but less than German luxury cars. Budget $500-$800 annually for routine maintenance.

6. Does it require premium fuel?
Yes, the 2.0L turbo requires premium (91+ octane) for optimal performance. The 3.6L V6 uses regular unleaded.

7. What are common problems to look for when buying used?
Check for turbo issues (smoke, oil consumption), transmission shifting quality, infotainment functionality, signs of coolant leaks, check engine lights, and verify all recalls have been completed. Request maintenance records showing regular oil changes.

8. How’s the resale value?
Below average. Buick sedans depreciate faster than competitors, which makes them good used buys but poor lease values. Expect 45-55% value retention after 5 years.

9. Is the back seat spacious?
Moderately spacious but not class-leading. Rear legroom is adequate for adults (36.9″), but headroom can be tight due to the sloping roofline, especially in the Sportback.

10. Should I buy one with high mileage?
Proceed cautiously. Ensure timing chain, turbocharger, and transmission are in good condition. High-mileage examples (80k+) may face expensive repairs. Full service history is essential. Consider a pre-purchase inspection.

Final Buyer Recommendations

✅ BUY IF:

• You want distinctive European styling at a discounted price
• You prioritize comfort and quiet cabin over sportiness
• You’re getting a well-maintained example with full service records
• You want a unique wagon (TourX) with AWD capability
• You find one priced significantly below competitors
• You can afford potential repair costs
• You appreciate the near-luxury features at a mainstream price

❌ AVOID IF:

• You prioritize maximum reliability (choose Honda Accord or Toyota Camry)
• You can’t afford premium fuel and potentially expensive repairs
• You need strong resale value
• You want the best-in-class interior space
• You’re looking for a long-term keeper beyond 150k miles without major repairs
• You want the lowest cost of ownership

💡 Best Value:

2019 Regal TourX Preferred or Essence – Offers unique wagon versatility, standard AWD, good feature content, and has the updated infotainment system. The 2019 model year received minor improvements and has more recall/TSB fixes applied.

Pre-Purchase Checklist:

1. ✓ VIN check for all recalls and verify completion
2. ✓ Pre-purchase inspection by qualified mechanic
3. ✓ Check for turbo health (compression test, smoke test)
4. ✓ Verify transmission shifts smoothly in all gears
5. ✓ Test all infotainment functions thoroughly
6. ✓ Look for oil leaks around turbo and engine
7. ✓ Check for timing chain rattle on cold start
8. ✓ Verify complete service history (especially oil changes)
9. ✓ Test electronic parking brake functionality
10. ✓ Inspect for coolant leaks

Budget Expectations:

• Purchase Price: $15,000-$25,000 (depending on mileage/condition/trim)
• Annual Maintenance: $800-$1,200
• Potential Repairs (years 1-3): Budget $1,000-$2,500/year reserve
• Insurance: Moderate (luxury sedan rates)
• Fuel Costs: Premium required (2.0T) – budget accordingly

Our Final Verdict

The 2018-2020 Buick Regal offers style, comfort, and features at attractive used prices, but comes with higher ownership costs and below-average reliability compared to Japanese rivals. It’s a good choice for buyers who value distinctiveness and comfort over long-term reliability and resale value, especially if you can find a well-maintained example with warranty coverage remaining.