MOT Failure: Should You Scrap or Repair? Decision Guide

An MOT failure certificate is never a welcome document. It's even less welcome when the list of required repairs is longer than your shopping list. But before you reach for the phone to book repairs, it's worth spending ten minutes on the actual numbers.

The Basic Equation

The decision to repair or scrap a failed car comes down to one comparison: what does the repair cost, versus what would the car be worth if it passed? If the repair cost is more than half the car's post-repair value, scrapping deserves serious consideration.

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Common MOT Failures and Their Costs

• –Brakes (pads, discs): £150-£400 depending on axle and parts quality
• –Tyres (4): £300-£600 depending on size and brand
• –Exhaust: £150-£500 depending on which section needs replacing
• –Suspension components: £200-£800 depending on what's failed
• –Catalytic converter: £200-£1,500 depending on vehicle
• –Headlight unit: £100-£400 per unit for modern cars
• –Structural rust: potentially economically unviable on older vehicles

When Repair Makes Sense

Repair makes sense when the fix is straightforward and cheap relative to the car's value. New brake pads on a £5,000 car is an easy decision — you spend £150-£200 and keep a vehicle worth many times that.

It also makes sense if you have a strong attachment to the vehicle, if it would be difficult or expensive to replace (unusual models, specific adaptations), or if the total cost is small enough that it's not really a financial decision at all.

When Scrapping Makes Sense

Scrapping makes sense when repair costs approach or exceed the car's value. A car worth £800 that needs £600 of repairs is a borderline case. A car worth £800 that needs £1,200 of repairs is not.

• –The car is old and other failures are likely to follow soon
• –There is structural rust that compromises the vehicle's long-term integrity
• –The car isn't ULEZ compliant and you drive regularly in London
• –You were already considering replacing the car
• –The repairs required are complex and reliability after fixing is uncertain

MOT Advisories to Watch

Don't just look at the failures — read the advisories too. Advisories are items that don't fail the car now but will need attention before the next MOT. A car that passes with five serious advisories may be in worse long-term shape than one with a straightforward single failure.

Getting a Scrap Quote After MOT Failure

Before committing to repairs, get a scrap quote. It costs nothing and takes five minutes. Knowing what the car would fetch as scrap gives you the full picture: you can compare the scrap value against the post-repair value minus repair costs and make an informed decision.

A car that failed its MOT is still worth money as scrap — often a meaningful amount. scrapcar.london collects MOT failures regardless of condition. The car doesn't need to run, and we'll collect it on a flatbed.