Parts for your 2004 Ford Falcon-Coil springs

2004 Ford Falcon coil springs — what they do and when to replace them

Referencing technical sources — including the Ford BA Falcon Workshop Manual (2002–2005), Gregory’s Service & Repair Manual for Falcon BA–BF, Ford Australia’s technical material on Control Blade IRS, and the BA Falcon (2002–2005) suspension specifications — coil springs are absolutely relevant to a 2004 Ford Falcon. Every 2004 Falcon uses coil springs on the front suspension. For the rear, BA sedan models run coil springs with Control Blade independent rear suspension, while the BA wagon and ute use a leaf‑spring live rear axle (so no rear coils on those variants).

On the Falcon, the front coil springs carry the vehicle’s weight, set ride height and work with the shocks to keep tyres planted over Australia and New Zealand’s mix of highways, backroads and corrugations. On BA sedans, the rear coils team with the Control Blade IRS to sharpen handling and improve comfort. Healthy coils keep ride height correct, steering geometry in check and braking behaviour consistent, tired or broken coils lead to sagging, bottoming out and uneven tyre wear.

For servicing, coil springs aren’t a regular “replace by date” item, but they should be inspected at each service or at least every 20,000 km. Look for cracked paint, corrosion (especially in coastal areas), a broken pigtail end, or a car sitting lower on one corner. If one spring has failed or sagged, best practice is to replace springs in axle pairs to maintain balance and braking stability. It’s also smart to renew bump stops and insulators at the same time, and consider fresh shocks if they’re old — mismatched damping can chew through new coils prematurely.

• Common symptoms of worn coils: uneven ride height, clunks over bumps, frequent bottoming out, steering pull, and accelerated inner or outer tyre wear.
• Replacement tips: use a proper spring compressor, torque control arm fasteners at normal ride height, book a wheel alignment afterwards.
• Selecting springs: stick with quality OE‑equivalent for comfort, or reputable uprated/lowered springs if chasing stance and response. Check local rules — NZ may require LVV certification for significant ride‑height changes, Aussie states have their own limits.

Owners of BA wagons and utes still have front coil springs to care for, even though the rear runs leafs. Keeping loads within GVM and avoiding persistent overloading helps coils and shocks live a long, quiet life.

Popular questions about 2004 Ford Falcon coil springs

Do all 2004 Falcons have rear coil springs?
BA sedans do — they use coil springs with Control Blade IRS at the rear. BA wagons and utes do not, they run a leaf‑spring live axle in the rear. All variants use front coil springs.

How long do coil springs last on a BA Falcon?
There isn’t a fixed interval. Many last well beyond 150,000–250,000 km, but coastal corrosion, heavy loads and rough roads can shorten life. Springs should be inspected during routine services and replaced if sagging, cracked or broken.

Can a single coil spring be replaced on its own?
It’s not recommended. Replacing springs in axle pairs keeps ride height even and handling predictable. After any spring change, a wheel alignment is advised, and pairing new springs with good shocks delivers the best result.