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Parts for your 1999 Toyota Crown-Control arms
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1999 Toyota Crown control arms: what they do and when to replace them
Control arms are absolutely used on the 1999 Toyota Crown. Technical references such as Toyota’s New Car Features for the S170 series (1999) and the Toyota Electronic Parts Catalogue for JZS171/GS171/UZS171 variants specify a double‑wishbone front suspension with upper and lower control arms, and a multi‑link rear that uses multiple control arms/links to locate the hub. Workshop literature for the S170 platform likewise details service procedures for front lower ball joints and arm bushes, confirming these parts are fitted and serviceable.
On a ’99 Crown, the control arms locate the wheels while allowing the suspension to move smoothly. They manage camber and caster at the front, keep toe stable under braking and cornering, and use rubber (or hydraulic) bushes to isolate vibration. The ball joint at the steering knuckle pivots the assembly, delivering that plush, planted feel Crowns are known for.
Owners typically notice worn control-arm components as clunks over bumps, wobble under braking, wandering on the motorway, uneven tyre wear, or a vague steering wheel. Bushes harden and crack with age, and ball joints develop play—often between 120,000–200,000 km depending on roads and loads.
Good servicing practice for a 1999 Toyota Crown control-arm setup includes:
- Regular visual checks for split bushes, leaking hydro-bushes, torn ball-joint boots, and rust around arm mounts.
- Listen for knocks on speed humps and feel for steering shimmy at 80–100 km/h.
- Rotate tyres and do a wheel alignment annually, poor alignment can mask bush wear and accelerate tyre scrub.
- Replace in axle pairs where practical to keep handling balanced. Always book a precision alignment after any arm, bush, or ball-joint work.
- Torque arm bolts at normal ride height to avoid preloading new bushes. Replace one‑time nuts/bolts and seized cam bolts as required.
For longevity, quality bushes (OE or reputable aftermarket) and sealed ball joints are worth it. Many S170 arms allow bush-only replacement, others may be more efficient to swap complete arms if the ball joint is riveted or the arm is corroded. If the Crown sits unevenly, chews the inner edges of the tyres, or feels nervous in crosswinds, it’s time for a suspension inspection with a focus on the control arms.
Popular questions
Does the 1999 Crown have rear control arms as well as front?
Yes. The S170 Crown uses a multi‑link rear suspension that employs several control arms/links per side to manage wheel location and toe change. These rear arms have serviceable bushes and, in some cases, eccentric cam bolts for alignment.
Can the bushes be replaced without changing the whole arm?
Often, yes. Many front and rear arms accept press-in bushes. If the ball joint is worn, seized, or integrated, a complete arm may be the smarter option. A workshop with a press and the correct sleeves will get the best result.
Do I need an alignment after control-arm work?
Absolutely. Any change to arms, bushes, or ball joints affects camber, caster, and toe. A post-repair alignment is essential for stable handling and even tyre wear.
