A bonnet guard, sold as a bug deflector, hood protector or stone guard, sits on the leading edge of the bonnet and takes the stones and insects that would otherwise chip the paint. It is a product customers judge in two seconds: it either follows the line of the bonnet exactly, or it looks like an afterthought.

This guide is for accessory distributors, retailers, online sellers and companies building their own brand. It covers the decisions you make when sourcing bonnet guards from factories in Taiwan, Thailand and Malaysia: material, fixing method, model-year fitment, finish, quotation terms, duty classification and the checks to run before you list.

💬 Planning a bonnet guard range? Send us the vehicles, the finish you want and a rough quantity, and we will look for factories in Taiwan, Thailand and Malaysia that already hold the right moulds. Tell us about your project.

Start from the vehicle list, not the catalogue

Every bonnet guard is formed for one bonnet shape, so the first question is which factories already hold moulds for the vehicles you sell.

Bonnet guards are formed from sheet on a mould made for one bonnet. If a factory already has that mould, it may sell small quantities as stock items or add your logo to them. If it does not, someone has to measure the vehicle and make a new mould, which adds tooling cost and trial time.

Ask each factory for its list of existing moulds by model, generation and year range, and match it against your sales data. For a first order, choose the models you already sell most of, from factories that already hold their moulds. Add new tooling only for gaps that your sales justify. Our car accessory OEM guide for Taiwan, Thailand and Malaysia explains this staged approach across product types.

Facelifts and regional versions break fitment

The model name is not enough. A facelift often changes the bonnet, the grille or the headlamp line, and a guard formed for the earlier bonnet will leave a gap or sit proud on the later one. The same model can also have a different bonnet in different markets.

Give the factory the model code and the exact year range for your market, and ask two questions in writing:

  • Has the mould been test-fitted on a vehicle of this exact version?
  • Which year ranges does the factory itself list as compatible, and on what evidence?

If the factory cannot answer, plan a test fit on a vehicle in your market before you approve the order.

Acrylic or polycarbonate

Bonnet guards are mostly made from acrylic (PMMA) or polycarbonate; acrylic is valued for clarity and weather resistance, polycarbonate for impact resistance, and the right choice depends on what your customers drive through.

A bonnet guard takes more direct impact than a door visor, because it faces the road. The material trade-off is the same one we describe in our door visor OEM guide, but the weighting changes.

Acrylic (PMMA)Polycarbonate
Strength often citedWeather resistance and transparencyToughness and impact resistance
Weakness often citedLower impact strength than other thermoplasticsLower scratch resistance than glass unless coated
Typical buyerCustomers who want a clear or smoked finish that stays clearCustomers driving gravel roads or long highway distances
What to ask the factorySheet grade and thickness, edge finishingSheet grade, hard coat and UV protection

These are general characteristics of the two materials, not a guarantee for any particular sheet. Grade, thickness, coating and the forming process change the result, and two factories using the “same” material can produce very different guards. Compare physical samples, and ask the factory what weathering data it has for the sheet it uses.

If your customers drive in hot climates or under strong sun, ask about UV stabilisation and colour stability of the tint. If they drive long distances on gravel or in winter, ask about impact behaviour at low temperature. Put the answers in the specification so the volume production uses the same sheet as the approved sample.

Fixing method and paint protection

How the guard attaches decides whether it stays on at speed and whether it damages the paint it is meant to protect.

There are three common fixing methods:

  • Clip-on to the bonnet edge: brackets or clips grip the underside lip of the bonnet. No drilling, but the clips touch painted metal.
  • Screws into existing holes: the guard uses holes or fasteners already under the bonnet. Firm, but only works when the mould matches the exact vehicle version.
  • Adhesive tape: the guard is bonded to the bonnet surface with double-sided tape. Quick to fit, but it depends entirely on tape quality.

Whatever the method, the guard sits on painted bodywork and moves slightly with vibration and airflow. Ask the factory what it puts between the guard and the paint: rubber pads, foam or protective film at every contact point. Grit trapped under a guard without protection can wear the paint, and that becomes a complaint about your product.

At the sample stage, fit the guard on a real vehicle and check that:

  • the bonnet opens and closes without the guard touching the grille, headlamps or wings
  • washer jets, sensors or cameras near the bonnet edge are not blocked
  • there is no wind noise or vibration at highway speed
  • the guard does not lift at the edges after a period of driving and car washes

If the vehicle has features on or around the bonnet edge, such as sensors or a bonnet designed to move in a pedestrian impact, ask the factory whether the guard has been checked for interference on that version.

💬 Want the guards test-fitted on a real vehicle before you commit? We coordinate samples, fit checks and specification changes with the factory for you. Send us your model list.

Finish and branding

Tint, colour-matched paint and printed logos widen your range but each one adds a variable to quality and to cost, so start narrow.

Common finishes are:

  • Clear: protects the paint while staying almost invisible
  • Smoked or dark tint: the classic bug deflector look; tint depth varies between factories, so judge on samples
  • Colour-matched or black paint: painted after forming; ask about paint system, adhesion and stone-chip behaviour
  • Carbon-look or chrome-look film: a film applied to the guard; ask how it ages in sun

Each extra finish multiplies your SKUs: five vehicles in three finishes is fifteen stock lines. For a first order, choose one finish that suits your market and add others once you have sales data.

Your own logo can be printed or applied to the guard, or kept to the packaging. Vehicle makers’ names, logos and emblems are trademarks, and their original accessory designs can be protected as designs. Sunsho Trade does not arrange copies of original-equipment designs or vehicle makers’ logos, and you should not ask a factory for them.

What drives cost and minimum order

Bonnet guard pricing is built from mould availability, sheet material, finish, fixing kit and packaging; send the same brief to every factory to make quotations comparable.

Prices and minimums vary by factory, vehicle and material, so here is what moves them.

DriverWhy it matters
Existing mouldUsing an existing mould avoids new tooling; a new mould has to be paid back over a volume
Sheet and thicknessMaterial grade and thickness change cost and behaviour
FinishTints, paint and films each add a process or a changeover
Fixing kitClips, brackets, screws and pads are bought-in parts with their own minimums
PackagingA long, rigid part needs a carton and inserts that prevent cracking in transit

Packaging deserves attention. A bonnet guard is long, thin and easy to crack at the corners. Ask the factory how it packs for export and for courier delivery, and include drop-test expectations in your specification if you sell online.

If you commission a new mould, agree who owns it and where it is stored before you pay; our article on tooling and mould ownership agreements lists the clauses to include. When you compare factories, line up quotations on landed cost, not unit price alone.

HS code, duty and external projection rules

A plastic bonnet guard made for a vehicle is generally looked at as a body accessory under heading 87.08, but the rate is set by your import market and the projection rules by the market where you sell.

Note 2(t) to Chapter 39 of the Harmonized System says the plastics chapter does not cover parts of vehicles of Section XVII. That points a vehicle-specific plastic guard towards heading 87.08 (parts and accessories of motor vehicles), typically subheading 8708.29 (other parts and accessories of bodies). Japan’s tariff schedule (8 August 2026 edition) shows 8708.29 as duty-free. Other countries set their own rates; if you are unsure, ask your customs authority for a binding ruling before the first shipment.

Some markets regulate what may project from a vehicle’s body. UN Regulation No. 26 covers external projections of passenger cars (category M1) and states its purpose as reducing the risk or seriousness of injury to a person hit by the bodywork. It sets requirements such as minimum edge radii for protruding parts. How such rules apply to an aftermarket accessory fitted after sale differs by country, so confirm the current rule in the market where you sell. Ask the factory to round and finish all edges, whatever the rule says.

Japan is one example we checked against the published text. The transport ministry’s list of “designated parts” (Notice Jigi No. 235 of 16 November 1995, last amended on 8 April 2003) names hood wind deflectors among the parts that adjust airflow, under the body-related heading. A designated part fitted by a fixed method does not by itself count as a change to the dimensions recorded on the vehicle inspection certificate, but the vehicle must still meet the safety standards with the part fitted, and a note to the list says body-exterior parts a pedestrian or cyclist could touch must not have sharp or pointed edges facing outward. Our guide to window louvres and rear spoilers explains how the designated-parts notice works.

Before you list bonnet guards

As the importer you may carry product liability for the guards you sell, so publish exact fitment, a clear fitting guide and inspection terms agreed in writing.

Our car accessory OEM overview explains how Japanese and EU product liability rules treat importers. For bonnet guards the practical points are:

  • list model, model code and year range per SKU, and name the facelift boundary where there is one
  • explain the fitting method, including cleaning the paint and positioning the pads
  • tell customers to check the guard after the first drives and after car washes
  • inspect before shipment for shape against the approved sample, cracks at fixing points, tint consistency and missing fixings

The groundwork is the same for every item: the fitment data the factory needs, what drives mould cost and packaging for online marketplaces.

Frequently asked questions

1. Is acrylic or polycarbonate better for a bonnet guard?
Acrylic is valued for clarity and weather resistance, polycarbonate for impact resistance. Choose by your customers’ roads and climate, and compare samples of the actual sheet each factory uses.

2. Will a bonnet guard damage my customers’ paint?
It can if grit is trapped between the guard and the paint. Ask for pads or protective film at every contact point and tell customers to clean the area before fitting.

3. Does one bonnet guard fit all years of a model?
Often not. Facelifts can change the bonnet or grille line. List year ranges per SKU and test-fit across the boundary before you sell both versions.

4. Can I sell colour-matched bonnet guards?
Yes, many factories can paint guards after forming. Each colour adds a SKU and a process, so start with one finish and check paint adhesion on samples.

5. What duty do bonnet guards pay?
It depends on your import market. A vehicle-specific plastic guard is generally looked at under 8708.29, which Japan’s 8 August 2026 schedule shows as duty-free. Check your own country’s schedule.

Summary

Bonnet guard sourcing turns on three things: a mould that matches your exact vehicle version, the right sheet for your customers’ roads, and a fixing method that protects the paint.

Factories in Taiwan, Thailand and Malaysia make bonnet guards for export, and many hold moulds for popular models. Sunsho Trade is a trading company, not a factory: we find and vet the factory that fits your brief, collect like-for-like quotations, run samples and inspection, and arrange delivery, for stock items or your own brand.

💬 Sourcing bonnet guards from Taiwan, Thailand or Malaysia? See our car accessory OEM service, or send us your vehicle list and we will come back with factory options.

Sources

Checked on 24 October 2026.