Are leaf spring and spring pack the same thing?

Yes. "Leaf Spring" and "Spring Pack" refer to the same car part. Other common names include Spring Pack, Leaf Spring Pack, Leaf Spring Assembly. The part is the same regardless of which name is used.

What are the signs of a worn or broken leaf spring?

Look for the vehicle sitting lower or leaning to one side, a sagging or saggy rear end, and a harsh, bouncy ride. A clunking noise over bumps, reduced load capacity, or a visibly cracked or shifted spring leaf are also clear warning signs.

What does a leaf spring do and when should it be replaced?

A leaf spring supports the vehicle's weight, absorbs road shocks, and keeps the axle located, most often on the rear of vans and pickups. Replace it when a leaf is cracked or broken, the spring has sagged, or the ride height has dropped, and always replace springs in pairs across an axle to keep the vehicle level.

How do I choose the correct rear leaf spring for my vehicle?

Leaf springs vary by the number of leaves in the pack and the vehicle's load rating, so the same model can have different options. Enter your registration above to see rear leaf springs confirmed to fit your exact vehicle.

How much does leaf spring replacement cost?

The price of a leaf spring depends on your exact vehicle and the brand you choose. Enter your registration above to see parts confirmed to fit, then compare prices from the brands we stock on this page. Free UK delivery on orders over £99.

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Leaf Spring buying guide — what to know before you buy

Leaf springs are a type of suspension spring made from one or more curved steel plates (leaves) that flex under load, absorbing road shock and supporting the vehicle's weight. They are commonly found on the rear axle of vans, pick-up trucks, and light commercial vehicles, where load-carrying capacity is a priority.

How leaf springs work

A multi-leaf spring pack consists of several graduated-length steel strips clamped together. The main (longest) leaf has eyes at each end that mount to the vehicle chassis — one end fixed, the other on a sliding shackle that allows the spring to change length as it flexes. Under load the leaves bow and flex progressively, with additional leaves engaging as load increases. This gives a variable spring rate that is soft under light loads and stiff under full load.

Modern designs sometimes use a single parabolic leaf with a carefully profiled cross-section that provides a similar progressive rate with less weight and inter-leaf friction.

Signs of worn or broken leaf springs

A broken leaf spring leaf causes the vehicle to sag on one side, reducing ground clearance and causing the axle to sit at an incorrect angle. This produces handling that pulls to one side, abnormal tyre wear, and in severe cases allows the axle to contact the chassis bump stop at all times, giving an extremely harsh ride. A knocking or creaking from the rear suspension on bumps can indicate leaves separating from the pack or worn centre bolt and U-bolt hardware.

Corrosion is the most common cause of leaf spring failure in the UK. Salt and moisture penetrate between the leaves, and rust pits on the leaf surface act as stress risers for fatigue cracks.

Vehicle sagging to one side at the rear
Knocking or creaking from rear suspension
Abnormal tyre wear at the rear
Visible break or separation of a leaf
Excessive suspension travel (leaves worn flat)

Replacement

Leaf spring replacement requires axle support and careful work around the U-bolts and centre bolt. Replace the U-bolts, centre bolt, and shackle bushes at the same time — reusing corroded hardware leads to early re-failure. Use the registration lookup to confirm the correct spring pack specification for your vehicle's load rating and axle type.