Ford Fiesta Mk7 1.5 TDCi 75bhp — Suspension Coil Spring Snapping
A very common MOT failure in the UK. Suspension coil springs corrode and snap, usually near the bottom pigtail.
Severity
SevereDIY Difficulty
Hard
Est. Cost
£150–£300
OBD Codes
None
Suspension
Typical layout and location for the Suspension assembly.
Symptoms
- Loud 'twang' or bang when turning the steering wheel at low speeds
- Car sits noticeably lower on one side
- Grating noise over bumps
Root Cause
The protective coating on the steel spring chips from stone impacts. Salt water corrodes the exposed steel, weakening the spring until it fractures under load.
How To Fix
- Visually inspect all four springs for fractures at the very bottom coil.
- Always replace coil springs in pairs across an axle to maintain handling balance.
- Cost: £150-300 per pair at an independent garage.
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £60–£120 |
| Independent Garage | £150–£300 |
| Main Dealership | £240–£480 |
Other Faults on This Variant
DPF Blockage and Regeneration Failure
ModerateThe 1.5 TDCi diesel Fiesta is commonly used for short urban trips — exactly the wrong usage for a DPF-equipped car. Blocked DPF is the number one complaint.
EGR Valve Failure and Intake Carbonisation
ModerateEGR failure on the 1.5 TDCi Fiesta is a common companion to DPF issues. Carbon deposits block the valve and intake manifold, causing power loss and rough running.
Diesel Injector Failure and Rough Running
SevereCommon rail injectors on the 1.5 TDCi can fail, causing misfires, excessive smoke and hard starting. Injector failure can also result in diesel washing the cylinder walls, accelerating engine wear.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.