Honda CRX Si Buying Guide: Rust Prone Areas and Missing Interior Trim Pitfalls
There’s a specific kind of disappointment that comes from pulling back the carpet of a classic Honda CRX Si you’re about to buy, only to find the floor pan has more holes than a cheese grater.
You’ve heard the stories about the CRX Si’s legendary handling, its rev-happy engine, and its undeniable cool factor. But beneath that stylish wedge shape and those sporty plastic side skirts lies a hidden truth: rust and missing trim are the two biggest threats to your wallet and your sanity. This guide will walk you through exactly where to look and what to avoid, so you don’t end up with a project car that’s more trouble than it’s worth.
TL;DR
When buying a Honda CRX Si, rust is the number one enemy. Check the rear wheel arches, rocker panels (especially under the plastic covers), base of the windshield, and the sunroof area. The plastic front fenders and body cladding crack easily and are nearly impossible to replace. Interior trim pieces for the dashboard, door panels, and cargo area are also extremely hard to find. Walk away if you see structural rust around the torsion bar mounts, panhard bar mounts, or bumper supports—these are expensive death sentences for the car.
Key Takeaways
- Rust hides everywhere—especially under plastic rocker covers, behind rear wheel arches, and around the windshield base
- Plastic panels are brittle—front fenders, center nose pieces, and side cladding crack easily and replacements are rare
- Interior trim is a nightmare—cracked dashes, missing radio surrounds, and torn seat bolsters are very hard to replace with original parts
- Sunroof drains cause rot—clogged drain tubes lead to rust around the sunroof that often spreads to the roof structure
- Bring a flashlight and a magnet—check structural mounts like torsion bar mounts and panhard bar mounts for serious corrosion
Understanding the CRX Si’s Appeal
The CRX Si, especially the second generation (1988-1991), holds a legendary status among Honda enthusiasts. Weighing just over 2,000 pounds, powered by the 1.6-liter D16A6 engine producing around 108 horsepower, it delivers a driving experience that modern cars struggle to match. The double-wishbone suspension, responsive steering, and manual transmission make it a joy on twisty back roads.
But here’s the thing—these cars are now over 30 years old. And while Honda’s engineering was top-notch, the metal and plastic weren’t built to last forever. Finding a clean, unmodified Si is getting increasingly difficult, and the difference between a good one and a bad one might not be obvious at first glance.
Rust Prone Areas: Where the Metal Disappears
The CRX Si’s biggest enemy is corrosion. Knowing exactly where to look can save you from buying a car that’s structurally compromised.
Rocker Panels: The Hidden Danger
The lower rocker panels are perhaps the most notorious rust spot on the CRX. The car has plastic cladding running along the sides, which looks sporty but serves a darker purpose—it hides rust. Sellers often leave these covers on because they’re fragile and prone to cracking if removed. But if you don’t check underneath, you’re buying blind.
What to do: If possible, gently remove or peek under the plastic rocker covers. Look for bubbling paint or rust bleeding through. Check the jack points specifically—these are common failure areas.
Rear Wheel Arches and Quarter Panels
Rust in the rear wheel arches is another classic CRX problem. These areas collect dirt, moisture, and road salt, slowly eating away at the metal from the inside out. If you see bubbling paint or visible rust around the arches, assume it’s worse underneath.
The rear quarter panels themselves are also vulnerable, especially near the bottom where they meet the rocker panels. One owner noted that a car that looked clean on the outside could be hiding serious rust behind the rear wheel openings.
The Sunroof Disaster
The electric sunroof is a desirable feature, but it’s also a rust magnet. Honda designed drain tubes to channel water away, but they clog over time. When they do, water pools around the sunroof frame and starts eating the metal.
What to look for: Check the leading edge of the sunroof for rust bubbles. Inspect the headliner for water stains. Push gently on the surrounding roof metal—if it feels soft or gives way, serious corrosion has already set in.
Windshield and A-Pillar Rust
Rust at the base of the windshield is a common problem that’s expensive to fix. Water gets trapped under the windshield seal, leading to corrosion that can spread to the A-pillars and even compromise the structural integrity of the car.
Pro tip: Look carefully at the bottom corners of the windshield where the glass meets the body. Any bubbling or rust here means the windshield needs to come out to properly repair it—a job that can easily run into the thousands.
Structural Mounts: The Deal Breakers
This is where you separate a fixable car from a parts car. The torsion bar mounts, panhard bar mounts, and rear bumper supports are critical structural points. If these are rusted through, you’re looking at major fabrication work.
What to inspect: Crawl underneath the car and examine where the torsion bars attach to the body. Look at the panhard bar mounts on the rear axle and chassis. Check the rear bumper support bracket—one buyer walked away from a potential purchase when he saw the bumper support “disintegrate” and the mounting point was nothing but “a collection of oxides in the general shape of the mount”.
Floor Pans and Frame Rails
While not as commonly mentioned, floor pans and frame rails should also be inspected. Pull up the carpet if possible—surface rust isn’t ideal but can be treated, while rust holes require welding. The frame rails underneath the car should be solid with no signs of crushing or severe corrosion.
Missing Interior Trim: The Unobtainium Problem
Rust is bad, but at least you can weld metal. Missing interior trim pieces are a different nightmare altogether—they’re often impossible to replace.
The Dashboard and Center Console
The CRX dashboard is notorious for cracking, especially in sun-exposed cars. The material wasn’t designed to last three decades, and replacements are extremely hard to find in good condition. The radio surround and climate control bezel are also fragile and easily broken during stereo installations.
What to check: Look for cracks in the dashboard, especially near the defroster vents. Check that the climate control trim isn’t missing or broken. If you see damaged trim, be prepared to hunt endlessly on eBay or Facebook Marketplace, or consider aftermarket solutions like custom gauge panels.
Door Panels and Seats
The cloth upholstery on CRX Si seats tends to wear on the driver’s side bolstercitation:10. The striped velour center inserts look great but don’t hold up well to decades of sliding in and out. Door panels also suffer from fading, cracking, and broken clips that hold them in place.
Quick check: If you’re looking at a car with torn seats and damaged door panels, factor in the cost of professional reupholstery or sourcing used replacements. Good luck finding matching fabric.
Cargo Area Trim
The rear cargo area has several trim pieces that are often missing—the parcel shelf, hatch area side panels, and the trim around the rear hatch opening. These are specific to the CRX and not easily sourced from other Honda models.
The Plastic Front End
First-generation CRX Si models (1985-1987) have plastic front fenders and a plastic center nose piece. These parts become brittle with age and crack easily. Replacement pieces are virtually impossible to find in good condition.
What to check: Look at the fit of the fenders and center panel. Poor alignment might mean the car was repaired with non-Si parts. Even minor cracks should be taken seriously because finding replacements is a nightmare.
Other Common Issues to Watch For
Electrical Gremlins
The CRX’s electrical system can develop quirks over time. The main relay under the dash is a common failure point—cracked solder joints cause intermittent starting problems. The distributor ignitor is another known weak spot, sometimes causing the tachometer to drop to zero at idle.
What to do: If the tach acts erratically or the car dies without warning, budget for a quality distributor rebuild or replacement. Avoid cheap aftermarket units—they often fail quickly.
Mechanical Wear
Even the legendary Honda D-series engines show signs of wear after 30+ years. Look for valve cover gasket leaks, distributor O-ring leaks, and oil pan seepage. The manual transmission synchros can wear, causing grinding during shifts.
What to Look For: A Buyer’s Checklist
Before you hand over your cash, run through this quick checklist:
- Inspect the underside thoroughly—use a flashlight and look at the torsion bar mounts, panhard bar mounts, and rear bumper support area
- Check under the carpet—lift it in the trunk and front floor areas to look for rust or moisture
- Examine rocker panels—look for rust bleeding through or bubbling under the plastic cladding
- Test the sunroof—check operation, look for rust on the leading edge, inspect the headliner for water stains
- Look at the windshield base—any bubbling paint suggests rust underneath
- Check all interior trim—note any cracks, missing pieces, or damage, especially on the dashboard
- Ask about service history—timing belt, clutch, and brake records can indicate how well the car was maintained
- Start the car cold—listen for unusual noises and watch for smoke on startup
Frequently Asked Questions
Where does the Honda CRX Si rust the most?
The rear wheel arches, rocker panels (especially under the plastic covers), base of the windshield, sunroof area, and structural mounts like the torsion bar and panhard bar mounts are the most common rust spots.
Can I fix rust on a CRX Si myself?
Surface rust can be treated with sanding and rust converter. Structural rust or rust holes require professional welding—and if the rust is on critical mounts, the car might not be worth saving.
Why are CRX interior trim pieces so hard to find?
These cars are over 30 years old and many were modified or crashed. The specific interior parts for the CRX don’t interchange with other Honda models, and reproduction parts are rare.
Are plastic front fenders a problem on the CRX Si?
Yes, especially on first-generation models. The plastic fenders and center nose pieces become brittle with age and crack easily. Replacements are extremely difficult to find.
Is a CRX Si with minor rust a good buy?
It depends on the location. Minor surface rust on non-structural areas can be addressed. But if you see rust around suspension mounts, the sunroof frame, or the windshield base, it’s often a sign of deeper problems that will be expensive to fix.
References
For further reading about Honda CRX Si buying advice and common issues:
- Grassroots Motorsports: First-Gen CRX Buying Advice
- Honda-Tech: What to Look for When Buying a CRX
- FatBoysOffroad: 1990 CRX Si Owner’s and Buyer’s Guide
- Bring a Trailer: Historic CRX Si Auction Listings
Have you ever owned a CRX Si? What was the hardest part about finding one? Share your story in the comments below.
