The new representation uses a set of six cartoon-style characters, with each representing NT & A products - a battery, an oilcan, an exhaust, a shock absorber, a brake pad and a tyre.
The firm will use a national publicity campaign to promote the re-branding and to increase its high street presence.
National has already seen a 10 per cent increase in sales over the last year, and has introduced initiatives such as a points-earning partnership with Tesco, on-line ordering, and half-price MoTs. It expects a similar rise by the end of this year.
“The new identity has been successfully incorporated into National's new advertising activity and an extra £1m has been committed to the re-branding exercise throughout our network,” says Michael Bourne, head of marketing.