2.2 External Projections, Vehicle Dimensions & Mudguards

Inspect the exterior as a safety system

The exterior inspection addresses injury risk, component retention, legal dimensions, and spray control. Apply the specific General Vehicles pages for external projections, dimensions, and mudguards; do not replace them with a remembered “sharp-edge radius” that is not in the current reason for rejection.

External projections and panel security

Walk around the vehicle at normal body-contact height and inspect from several angles. Look for a component that is missing, detached, broken, bent, or modified so that it presents an avoidable risk of bodily injury. Common examples include:

• torn metal at a wing or quarter panel;
• a bumper end, bracket, aerial, ornament, or accessory with a hazardous exposed edge;
• insecure trim or bodywork likely to detach;
• an incorrectly fitted bull bar, winch, rack, or other accessory;
• a bonnet, boot lid, tailgate, or hinged cover that cannot be retained securely; and
• corrosion or crash damage that leaves a dangerous projection.

Judge the actual risk described by the VIRM. A harmless factory contour is not a failure merely because it feels firm, while a small torn edge can be a failure if it presents a realistic contact hazard. Temporary tape does not restore strength or secure retention when the underlying component remains dangerous.

Registration plates, lamps, and other equipment have their own pages. If an accessory affects lighting, structure, steering, or dimensions, evaluate those consequences too.

Dimensions

Identify the vehicle class and configuration before applying a limit. The dimensions page covers overall width, height, length, front and rear overhang, and related projections, with rules and exceptions that vary by vehicle type and use. Measure where appearance suggests a breach or a modification has changed the envelope. Include permanent fittings as the VIRM directs and use its diagrams and tables to identify the measuring points.

A homemade tray, widened body, long rear extension, or accessory can require specialist certification even if it appears well constructed. Conversely, a factory or specifically excluded fitting may be allowed. The assessment skill is to locate the applicable row and any certification threshold, not to memorise one number divorced from class and date.

Mudguards and wheel coverage

Inspect each road wheel. Required mudguards must be present, securely attached, and able to perform their spray- and debris-control function. Reject dangerous fractures, insecure panels, or inadequate coverage where the tyre is not covered through the prescribed area. Check modifications such as wider wheels, altered offset, flares, and cut arches together: a flare that is decorative or loose does not cure prohibited tyre projection.

Mudflaps are not universally mandatory for every light vehicle, so determine what the VIRM requires for the class and body. Where fitted or required, they must not be so damaged or insecure that they create a hazard.

Inspection workflow

1. Identify class and note obvious body or wheel modifications.
2. Walk the perimeter for injury-producing projections and insecure panels.
3. Operate retention devices for bonnet, boot, tailgate, and other applicable hinged panels.
4. Use the dimensions table and measurement diagrams when the envelope is in doubt.
5. View wheel coverage from the prescribed positions and inspect mudguard retention.
6. Cross-check modification tables for LVV or accepted overseas evidence.

Scenario

A utility has wide wheels and plastic flares. The tread is covered when viewed from above, but one flare is held by two loose self-tapping screws and can rotate into the tyre. The visual coverage does not end the check: the insecure guard and its resulting hazard are reasons to reject.

Link exterior changes to other pages

An external accessory can create several simultaneous checks. A frontal protection system may create projections and affect structure, lamps or airbags; a rear rack can obscure plate lamps, indicators or reflectors; a tray conversion can affect dimensions, mudguards, rear overhang, structure and certification. Record each failed function under its own page rather than collapsing everything into “modified body.”

When measuring, place the vehicle on appropriate level ground in the VIRM condition and use the stated reference points. Photographing a tape at an angled body contour is not reliable evidence. Where a table exception depends on a retractable/removable fitting, establish how the VIRM treats that fitting in normal road use before excluding it.