| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Having carried out the road test, see the Table S15 RUMOROSITA'' in condizioni di marcia, there was a whistling noise from the back.Continue depending on the circumstances in which the noise occurs | End of diagnosis | The noise increases when cornering | Replace the wheel bearing on the side where the noise is loudest Op. 4450C32  | This bearing is used by the ABS active sensors to calculate the wheel speed. It should NEVER come into contact with metal shavings or magnetic components (screwdrivers, etc.) because they could alter the gap or damage the codifier and prevent a correct reading from the sensor |
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| The noise increases in vertical oscillation conditions | Move on to Step 2 |
| 1 | BRAKE DISC CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the gap between the brake disc and the steel shield is sufficient | Move on to Step 2 | Gap too small | Restore the correct gap. |
| 2 | SHOCK ABSORBER STEM CHECK | All OK | Problems encountered | Operation |
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| Removing the wheel Op. 4450B12 FRONT WHEELS (TWO) - R+R Check that the noise is not due to irregular friction between the shock absorber stem and the gasket, checking the condition of the stem chrome surface. | End of diagnosis | There is irregular friction | Lubricate the stem raising the dust cover with a layer of silicon grease. If the noise persists, replace the shock absorber Op. 4410A12 FRONT SUSPENSION DAMPER (ONE), LH OR RH - FOR MCPHERSON STRUT SYSTEM - INCLUDES DISMANTLING/REASSEMBLY OF ASSEMBLY AT BENCH - R.R |
