Parts for your 1999 Toyota Crown-Coil springs

1999 Toyota Crown Coil Springs: Fitment, Purpose, and Service Advice

Based on technical sources including the Toyota Crown S170-series workshop manual (front and rear suspension sections), the Toyota Electronic Parts Catalogue (EPC) listings for JZS171/JZS173/JZS175, and model brochures from the 1999 launch, the 1999 Toyota Crown sedan (S170 Royal and Athlete grades) is factory-fitted with steel coil springs. Front is a double-wishbone coil-over shock arrangement, with a multi-link rear that uses coil springs. Notable exceptions: certain variants with electronically controlled air suspension, particularly Crown Majesta UZS17# models and some Crown Estate grades with rear self-levelling air, use air bags instead of conventional coils. For most 1999 Crowns on Aussie and Kiwi roads, coil springs are relevant and serviceable items.

On S170 Crowns that run coils, the springs shoulder the vehicle’s weight, keep ride height where it should be, and help the shocks control body movement. Good coils mean tyres stay planted, steering feels settled, and the big Toyota glides over bumps the way it should.

During regular servicing, a quick coil-spring check goes a long way. Look for sag (one corner sitting low), chipped or broken coil ends, excessive surface rust, and shiny “coil bind” marks. If the Crown feels floaty, bottoms out over speed humps, or chews tyres unevenly, the springs and shocks deserve a closer look. There’s no fixed replacement interval, but inspection every 20,000 km or annually is a smart move, many original sets are tired by 150,000–200,000 km, especially if the car tows or carries loads.

• Always replace coil springs in axle pairs to keep balance side-to-side.
• Match spring rate and free length to the exact variant (Athlete vs Royal, 2WD vs i-Four AWD) per EPC data.
• Use a quality spring compressor, never cut or heat springs.
• Refit rubber isolators, check strut top mounts and bump stops, and torque suspension bolts at normal ride height.
• Finish with a wheel alignment, as ride height changes alter camber and toe.

If the vehicle has height-control buttons, air lines to the struts, or an “AIR SUSPENSION” note in the handbook, it’s an air-sprung variant—different parts and procedures apply, and conventional coil springs won’t be used on those corners.

Popular questions about 1999 Toyota Crown coil springs

How do I tell if my 1999 Crown has coil springs or air suspension?
Most Royal and Athlete sedans use coils. Majesta models typically have air. Check for a height-control switch inside, rubber bellows at the struts, or the build plate/frame code, the owner’s manual and EPC lookup for your VIN will confirm it quickly.

When should coil springs be replaced on a 1999 Crown?
There’s no strict kilometre rule, but replace if there’s sagging, cracks, or the ride is harsh or bouncy. Many owners refresh coils and shocks together once past 150,000–200,000 km, then align the car for proper tyre wear.

Can I fit lowering springs with stock shocks?
It’s possible, but not ideal. Shorter, stiffer springs work best with matched dampers. In AU/NZ, also confirm the drop complies with local regulations and get an alignment to keep the big Toyota tracking straight and looking after its tyres.