How serious are the crashes where this part is cited?

In NHTSA's crash sample (CRSS, 2019–2022), 1.9% of police-reported crashes that cite steering ended in a serious or fatal injury, against 2.3% of all police-reported crashes. A crash that cites a system is not necessarily a crash that system caused.

How badly people were hurt in crashes citing steering, against all crashes

What it shows: No Apparent Injury is the largest at 68.5%, followed by Possible Injury at 15.5%; the smallest shown is Suspected Serious Injury at 1.9%.

Source: NHTSA Crash Report Sampling System (CRSS), 2019–2022 pooled · data from 2022

Data and chart by CalcScrape: Power Steering Repair