The HQ, HJ, HX, HZ and WB Holden range remains one of Australia’s most popular classic car platforms. Whether you’re restoring a Kingswood, Premier, Monaro, Sandman, Statesman or WB ute, the interior plays a huge role in both the value and enjoyment of the vehicle.
A beautifully restored interior can transform a tired Holden into a show-winning classic. Unfortunately, after more than 40 years of Australian sun, heat, moisture and daily use, most original interiors have suffered significant deterioration.
Cracked dashboards, torn seat trims, sagging roof linings, faded carpets and brittle plastics are all common issues. The good news is that replacement parts, reproduction trim and restoration products are more available today than ever before.
Assessing the Interior Before Starting
Before purchasing parts, take the time to thoroughly inspect the interior.
Areas to Check
- Seats
- Door trims
- Dashboard
- Roof lining
- Carpet
- Steering wheel
- Centre console
- Seat belts
- Interior plastics
- Weather seals
Documenting the condition of each component helps determine the restoration budget and priorities.
Dashboard Cracks
Dashboard cracking is one of the most common HQ-WB interior problems.
Causes
- UV exposure
- Extreme heat
- Age-related plastic deterioration
Common Symptoms
- Surface cracks
- Splitting near vents
- Warping
Many original dashboards have spent decades exposed to Australian sunlight.
Best Dashboard Restoration Product
Recommended Product: Meguiar’s Ultimate Protectant
Benefits
- UV protection
- Restores appearance
- Helps prevent future cracking
Best For
- Original dashboards
- Restored interiors
- Ongoing maintenance
Seat Wear and Damage
Seat trim deterioration is another common issue.
Common Problems
- Torn vinyl
- Split stitching
- Worn bolsters
- Collapsed foam
Driver’s seats typically show the most wear.
Seat Foam Deterioration
Even if the trim looks reasonable, the foam underneath is often worn out.
Symptoms
- Uncomfortable seating
- Sagging cushions
- Uneven support
Replacing foam can dramatically improve comfort.
Best Seat Restoration Product
Recommended Product: Rare Spares Seat Foam Kits
Benefits
- Restores original shape
- Improved comfort
- Better support
Best For
- Restorations
- Daily drivers
- Show cars
Torn Vinyl and Upholstery
HQ-WB Holdens used a variety of vinyl and cloth trims depending on model specification.
Common Issues
- Cracking
- Fading
- Splitting seams
- Shrinkage
In many cases, complete retrimming provides the best result.
Best Vinyl Restoration Product
Recommended Product: Bowden’s Own Vinyl Care
Benefits
- Cleans vinyl safely
- Restores appearance
- UV protection
Best For
- Original interiors
- Ongoing maintenance
Carpet Deterioration
Carpet wear is common in vehicles of this age.
Symptoms
- Fading
- Holes
- Water damage
- Musty odours
Many HQ-WB Holdens have experienced water leaks at some point in their lives.
Best Carpet Upgrade
Recommended Product: Molded Replacement Carpet Kit
Benefits
- Factory-style fit
- Improved appearance
- Noise reduction
Best For
- Complete restorations
- Daily drivers
- Show vehicles
Roof Lining Problems
Roof linings are often one of the first interior components to fail.
Symptoms
- Sagging material
- Stains
- Tears
- Loose edges
Causes
- Heat
- Moisture
- Ageing adhesives
A fresh roof lining can dramatically improve the appearance of the cabin.
Door Trim Wear
Door trims suffer constant use.
Common Problems
- Warping
- Fading
- Loose trim clips
- Water damage
Causes
- Moisture
- UV exposure
- Age
Replacement trim clips often solve many rattles and fitment issues.
Best Door Trim Repair Product
Recommended Product: Rare Spares Door Trim Clip Kit
Benefits
- Secure fitment
- Reduced rattles
- Easy installation
Best For
- Restoration projects
- Door trim repairs
Steering Wheel Restoration
The steering wheel is one of the most visible interior components.
Common Problems
- Cracking
- Fading
- Wear marks
- Loose horn buttons
Many original wheels can be restored rather than replaced.
Best Steering Wheel Restoration Product
Recommended Product: SEM Plastic & Vinyl Coating
Benefits
- Restores colour
- Durable finish
- OEM appearance
Best For
- Steering wheels
- Interior plastics
- Dash components
Interior Plastic Damage
Plastic trim pieces become brittle with age.
Common Areas
- Pillar trims
- Dash panels
- Console components
- Vent surrounds
Finding good used components is often the most cost-effective solution.
Weather Seal Problems
Old weather seals can create multiple interior issues.
Symptoms
- Water leaks
- Wind noise
- Musty smells
- Carpet damage
Replacing seals protects the entire interior investment.
Best Weather Seal Kit
Recommended Product: Rare Spares Rubber Seal Kit
Benefits
- Prevents water leaks
- Reduces wind noise
- Improves cabin comfort
Best For
- Full restorations
- Daily drivers
Interior Lighting Upgrades
Factory interior lighting is often weak by modern standards.
Common Improvements
- LED globe upgrades
- Improved dash lighting
- Courtesy light restoration
These upgrades improve usability without altering the classic appearance.
Common Interior Restoration Mistakes
Starting Without a Plan
Many projects stall because parts are purchased randomly.
Ignoring Water Leaks
Always fix leaks before replacing carpet or trim.
Using Household Cleaners
Many household products damage vinyl and plastics.
Throwing Away Original Parts
Even damaged original components may be valuable as restoration templates.
Recommended Interior Restoration Package
For most HQ-WB Holdens, an effective restoration includes:
- Replacement carpet kit
- Roof lining kit
- Seat foam replacement
- Weather seal kit
- Vinyl care products
- Dashboard protectant
- New trim clips
This combination restores much of the factory appearance and comfort.
Which Interior Upgrade Gives the Biggest Improvement?
For most owners, replacing the carpet and roof lining delivers the most dramatic visual improvement.
These two upgrades alone can completely transform the cabin and make the vehicle feel decades newer.
The interiors fitted to HQ, HJ, HX, HZ and WB Holdens were built to last, but decades of Australian conditions have taken their toll. Fortunately, reproduction parts, restoration materials and specialist suppliers make it easier than ever to bring these classic cabins back to life.
A well-restored interior not only improves appearance but also increases comfort, enjoyment and vehicle value. Whether you’re building a concours-level restoration or simply refreshing a weekend cruiser, investing in the interior is one of the most rewarding aspects of any HQ-WB Holden project.
With careful planning and the right products, it’s entirely possible to recreate the look and feel that made these Holdens such popular family cars and Australian motoring icons.
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