Volvo S40, The Complete Buying Guide

Overview

The Volvo S40 spans two distinct generations, and they couldn’t be more different. The first generation (2000-2004) shares its platform with the Mazda 323 and Ford Focus, decent enough, but hardly a proper Volvo. The second generation (2004-2012) moved to Volvo’s own P1 platform and feels far more Swedish. Both generations share one thing: they’re fundamentally sensible compact sedans with good safety credentials, reasonable running costs, and that boxy Volvo aesthetic that dates them but not in a bad way.

People buy S40s because they’re cheap to run, safe, and easier to park than a V70. They’re also cheap to buy now, you’ll find decent examples for less than the cost of a used Corolla. The five-cylinder engine in both generations is the highlight: characterful, willing to rev, and surprisingly robust if maintained. The turbo variants add proper punch without being fragile. Not exciting, but dependable and quietly competent.

That said, these aren’t modern classics yet. They’re just old cars. The plastics feel cheap, the interiors wear badly, and rust lurks if the car’s been neglected. Walk away from anything with bodged repairs or a sketchy service history.

What to Look For

Body and Rust

The S40 isn’t immune to rust, though it’s less prone than older Volvos. First-generation cars (2000-2004) rust more than second-gen models. Focus your attention here:

• Wheel arches, front and rear. Check inside the arches, not just the painted surface. Surface bubbling means it’s already eaten through from behind.
• Sills and door bottoms, the door drains block easily. Feel along the bottom edge of each door. If it’s soft or flaky, walk away.
• Spare wheel well, lift the boot carpet. A damp or rusty spare wheel well means water’s getting in, probably through the rear light seals or tailgate rubber.
• Front wings, above the headlights and behind the indicator lights on first-gen cars. The inner splash guards help, but they’re not foolproof.
• Bonnet and areas under the bonnet, check the radiator support (crossmember) and battery tray for corrosion.
• Windscreen and rear window surrounds, white fogging inside the glass means moisture ingress from rust or failed seals. Not a deal-breaker, but it’ll cost you.

Surface rust on brake discs is normal. Structural rust in sills, crossmembers, or floor panels is a deal-breaker unless you’re buying a project.

Mechanical

The S40’s five-cylinder engine is the car’s best feature, but it needs maintenance. Most issues stem from neglect, not design flaws.

Timing belt: The engine is an interference design. If the timing belt snaps, the valves hit the pistons and you’re looking at a complete head rebuild or scrap. Volvo says 150,000 km on four-cylinders, but real-world experience suggests changing it at 70,000 miles (112,000 km) regardless of what the service book says. Multiple forum contributors report cracked belts showing up around 70,000-80,000 miles. Replace the tensioner and idler pulleys at the same time, they’re cheap insurance. If there’s no proof of a recent belt change, factor in $700-800 AUD for the job.

Oil consumption: Early five-cylinders (pre-2019) can burn oil due to worn piston rings. Check the dipstick cold and again after a test drive. If it’s dropped noticeably or there’s blue smoke on startup, expect to be topping up between services. Not fatal, but a sign of a tired engine.

PCV system: A clogged positive crankcase ventilation system causes oil blow-by, smoke from the dipstick tube, and can damage the rear main seal. Test: place a rubber glove over the oil filler cap with the engine running. It should be sucked down firmly. If it doesn’t hold vacuum, the PCV needs cleaning or replacement. Cheaper to fix now than after the rear main seal goes.

Coolant leaks: Check the expansion tank cap seal and all hoses, especially around the turbo on T5 models. A sweet smell through the vents or damp carpet under the dash means the heater core is leaking. Don’t ignore this, it’ll fog your windscreen and wreck the interior. Replacement means pulling the entire dash.

Gearbox: The manual M66 is solid. The Aisin automatic (used in second-gen cars) is generally reliable if serviced. Change the transmission fluid every 50,000 miles despite Volvo calling it “lifetime” fluid. Lifetime means the life of the gearbox, which won’t be long without fresh fluid. Clunky shifts when cold are normal for older autos; harsh banging is not.

Suspension: S40s ride firmly but shouldn’t crash or rattle over bumps. Listen for clonking from the front, likely drop links or worn top mounts. Second-gen cars use a sophisticated multi-link rear suspension that’s brilliant when fresh but expensive when bushes wear out. Budget $400-600 for a full refresh if it’s never been done.

Turbo (T5 models): The TD04 turbo is robust and designed to last the life of the car. If it’s whining, smoking, or leaking oil from the intake side, it needs a rebuild or replacement. Kits are under $100 AUD, but it’s fiddly work.

Electrical

Volvo’s green initiative resulted in cheap plastics and adhesives that don’t stick. Electrical gremlins are common but rarely catastrophic.

• ABS module: It’s not if but when. Failure causes the ABS light to stay on and the system to stop working. Multiple rebuilders can reflow the solder joints for $200-300. Less common is a failed rear ABS sensor.
• Instrument cluster: The odometer gear can fail on first-gen cars, so verify mileage against service records. You can read the true mileage from the ECU via diagnostic mode.
• Central locking and window motors: Second-gen door modules are known for failing. Symptoms: windows won’t go up, central locking works intermittently. Not dangerous, just annoying.
• Climate control: The fan can bind, causing the system to blow weakly or not at all. Often a bad ground or seized fan motor. Check all vents blow evenly.
• ETM (Electronic Throttle Module): Second-gen S40s with drive-by-wire can suffer ETM failures, causing stuttering, poor throttle response, and reduced power. Rebuilds are available, but budget $300-400. If this worries you, stick to first-gen cable-throttle cars.

Test everything: lights, wipers, heated seats, stereo, climate control, power windows. Electrical faults are tedious to trace and rarely get cheaper with time.

Interior

S40 interiors wear badly. The materials are cheap, the plastics scratch easily, and the seats pill after 100,000 km. Not a reason to walk away, but be realistic.

• Seats: Check for sagging bolsters, torn upholstery, and broken adjustment mechanisms. Leather wears better than cloth but cracks if neglected. Replacement seats from a wrecker are cheap.
• Dashboard cracks: Common on cars parked in the sun. Live with it or source a replacement dash. Not worth repairing.
• Door chime relay: The micro-switch in the door latch fails, causing the door ajar chime to sound constantly. Some owners just pull the blue relay to kill the noise.
• Centre console rattles: Dashboard mounts are flimsy and break. Hot glue will reattach them, but it’s a temporary fix.
• Headliner: Sags on high-mileage cars. Regluing is a weekend job if you’re patient.

Hard-to-replace items: dashboard (expensive, labour-intensive), rear window trim (discontinued), interior door handles (brittle, crack easily). Check these carefully.

Price Guide (Australia)

Prices as of 2025, approximate, condition-dependent:

• Project / non-runner: $500-1,500
• Rough but roadworthy runner: $2,000-4,000
• Good daily driver: $4,500-7,000
• Excellent example, low km, full history: $8,000-12,000
• Concours / collector condition: $15,000+ (rare, mostly T5 or limited editions)

First-gen cars are cheaper than second-gen across the board. Wagons (V50) command a slight premium over sedans for practicality.

Running Costs

Parts availability: Excellent. FCP Euro, IPD, and local Volvo specialists stock everything. Wear items are cheap; Bosch sensors, bearings, and bushes are all available aftermarket. Genuine Volvo parts for critical items (ECT sensor, spark plugs, timing belts) are worth the extra cost.

Servicing: Straightforward for a competent home mechanic. Oil changes every 5,000 km (half Volvo’s recommended interval) keep the engine happy. Timing belt is the big service; budget $700-800 every 100,000 km. Brake pads and discs are cheap and easy to fit.

Fuel economy: 8.5-9.5 L/100km for the five-cylinder, better for diesels if you can find one. Turbo models drink more under hard use but are reasonable when driven sensibly.

Insurance: Cheap. The S40 is a sensible small sedan with good safety ratings. No surprises here.

Common expensive repairs: ETM failure ($300-400), heater core replacement (dash-out job, $800+), ABS module ($200-300), full suspension refresh ($600+), air conditioning evaporator (dash-out, $1,200+ if it fails). Budget for these on high-mileage examples.

Which Variant?

Best buy: 2004-2007 S40 2.4i or T5 manual. The second-gen cars are better built, more refined, and less Mazda. The naturally aspirated 2.4i is torquey enough for daily driving and cheaper to insure. The T5 is the enthusiast’s choice: 220 PS, characterful five-pot howl, and genuinely quick. Avoid early automatics, the manual is more engaging and more reliable.

First-gen (2000-2004): Cheaper to buy, more rust-prone, and the Mazda DNA shows in the cheaper interior. The 1.9T is a solid engine but feels more like a warm hatch than a Volvo. Only worth it if the price is right and the service history is flawless.

Diesel: If you can find a D5, they’re economical and torquey. Turbo diesels bring their own complications (DPF, injectors), so service history is critical.

Avoid: First-gen automatics (clunky, unrefined), any car with no timing belt history, anything with structural rust, and anything with an ETM fault unless the price reflects the repair cost.

The Verdict

The S40 is a sensible, safe, affordable compact sedan that does everything competently but nothing brilliantly. Buy one if you want Volvo safety and character in a smaller, cheaper package than a V70. The five-cylinder engine is the highlight, charismatic, willing, and long-lived with proper maintenance. Timing belt history is non-negotiable. Walk away from anything rusty, neglected, or with electrical gremlins you can’t replicate. A good S40 will serve you well; a bad one will nickel-and-dime you into bankruptcy.