Is a Bull Bar really necessary for your 4WD?

4WD’s in Australia have been fitted with Bull Bars for years. Not only the ones that never leave the bitumen roads of the city, but those that head bush exploring this amazing country.

The thing is though, have you ever really stopped to think about what they do, and whether they are actually necessary? If you are wondering Do I need a Bull Bar, this post will cover it in depth.

There seems to be a trend where 4WD’s all get modified in the same way, but if you actually consider each accessory in detail, it might not be for you.

If you are looking for a bull bar, we wrote a comprehensive guide covering what you should consider; What to look for in a 4WD Bull Bar.

If you are wondering whether you actually need a Bull bar we cover that too, and in more detail below.

AFN bar on our Dmax
Do you really need a Bull Bar?
Land Cruiser Bull Bar
Installing a Bull Bar on our old Land Cruiser

What’s the downsides of a bull bar?

Reduced Safety ANCAP rating

Yep, I am deadly serious. On some vehicles, when you fit a bull bar the safety rating is decreased due to the impact it has in hindering crumple zones to do their job. 

In some instances, you might be safer with a bull bar on the front, but some crash tests done by private companies have shown that occupants are less safe when a bull bar is fitted than if you allow the factory engineering and crumple zones to do their thing.

This is not always the case, but in general a Bull Bar will limit the damage done to the vehicle and make it more likely you’ll be able to drive home.

It does this by protecting the front of the vehicle and stopping it from crumpling. This is good for the vehicle, but not good for the occupants, as they have a more abrupt stop instead of the vehicle taking some of this inertia.

4WD Clearance
Will fitting a Bull Bar to your 4WD make it less safe?

Extra weight

Bull bars aren’t light. This means more stress on your suspension and chassis, more fuel consumed to move it around and often modifications required to support the extra weight (heavier duty springs are super common).

The average steel bull bar on a modern 4WD is somewhere between 45 and 90kg. That comes off your available payload, hurts at the fuel pump and isn’t always good for the vehicle.

Even worse, a heavy bull bar can easily put your 4WD over its maximum front axle weight, effectively making it illegal. Not too many people know this, and if you take your 4WD over a weigh bridge you might get a bit of a surprise.

We had a mobile weighing service come out and do our Isuzu Dmax, and it was extremely close to the front axle capacity, and that’s with a light weight bar and winch.

Dmax rear axle weight
Have you had your vehicles axle weights done?

Reduced air flow and decreased aerodynamics

In many cases, the fitting of a bull bar will reduce air flow through the radiator and intercooler (where fitted). This in turn makes your engine work harder, especially the cooling side.

Simply making the change from nice round, curved bumpers to sharp edges that stick out further will cost you more in fuel too.

There are not too many Bull Bar manufacturers who test this either, so you won’t know what effect it has until you do it. Reduced air flow combined with worse aerodynamics, a heavier vehicle and all of the other modifications can make your vehicles motor work substantially harder than it did from the factory.

Dmax and air flow
I’m positive we get far less air flow now


A cheap steel bull bar is going to set you back about $800. A more expensive one around $2200. That’s a fair chunk of cash – you could do an 11,000km trip with our Dmax fuel economy for that sort of money!

Fern Pool in Karijini
The cost of a Bull Bar can buy you a long time away!

So, what’s the purpose of a Bull Bar?

Mounting point

For many, the primary reason for a Bull Bar is to have somewhere to mount things to. UHF antennas, spotlights, light bars and most importantly winches.

Some of these can be fitted without the use of a bull bar, but not always very easily. Also, some come with rated recovery point incorporated too.

Bull Bar mounting point
Our Bull Bar houses a UHF antenna, recovery points and a winch

Animal strikes

On older 4WD’s without air bags and crumple zones, a solid bull bar was fantastic for animals. You could hit even bigger kangaroos with a solid bar and not have any damage at all.

Today though, modern cars have fantastic crumple zones designed to protect the occupants, and a big hit will do damage. For me, its the difference between whether you can limp back into town, or you are stuck metres from what you’ve hit.

This is a big thing, as one decent impact with wildlife can put your trip on hold for months while you wait for it to be repaired, and I’d had to be in that position.

A Bull Bar offers you some insurance in this regard, and this is exactly why we purchased a Stedi Lightbar too.

Kangaroo in Kalbarri
Bull Bars are great at protecting your vehicle from animal strikes


There is a pretty high chance of knocking the front or sides of your 4WD when off road. Whether its a tree branch to one side, a rut that you slip into or a bush that you collect whilst turning around, having a bull bar on the front does offer a fair bit of protection.

If you do happen to knock it, the worst thing that happens is usually some paint scarring. If you knock your front bumper, or catch it on anything its pretty easy to crack or rip it off, which means you are up for a fair chunk to replace it, or you can just get a Bull Bar in its place.

Old vs new
A Bull Bar can provide some welcome protection when off road

Improved looks

You’ll find a lot of people fit Bull Bars because they like the way it looks. Lets be honest, some new 4WD’s look pretty average from the factory, and a nice Bull Bar can make a big difference. However, if you are just doing it for aesthetics, maybe its not worth the cost, and downsides?

Does a 4WD look better with a bar?
4WD’s often look better with a Bull Bar

Improved entry angle

From the factory, often bumpers are a limitation on entry angle, meaning they limit how much of an angle you can get when entering a steep slope, or a rocky incline.

Bull bars in general give you better, or sometimes the same entry angle which a lot of people value, as if the front of your car hits first, you aren’t going anywhere.

4WD entry angle
A good Bull Bar will improve your entry angle

Is it worth fitting a bull bar?

If you are aware of the downsides of a bull bar, and still feel the need to have one, by all means. However, a lot of people fit them without understanding what they actually do.

Do you really need a Bull Bar? That depends on how you want to use the 4WD, and the level of risk you are happy to accept.

Bull bar or not
How do you use your 4WD? Do you really need a Bull Bar?

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  1. Hey Gareth,

    Yep, just one of those things to consider when choosing a bull bar, or deciding whether to get one in the first case. It’s pretty clear that they hurt the economy, but it would be nice to know how much. I wonder if ARB or the likes do any wind modelling.

    All the best mate

  2. This is practically the only article I find that mentions the aerodynamic effect of bull bars.

  3. Hey Kent,

    Thank you. Keeping it light weight is certainly a good idea! I don’t know too much about the Jimny options, but ARB sell the smart bar (plastic) and would be able to tell you if they do them. I think you can get them winch compatible.

    Alternatively, you might find an aluminium bar around that is winch compatible, and if its painted you wouldn’t even notice the difference.

    Asides from this, you’d have to go for a light weight tube bar.

    All the best

  4. Kent Olive says:

    Thanks for your great common sense no garbage posts mate. I’m considering a bull bar for my Jimny, mainly for a little additional protection and to mount a winch, but want to keep it light as that’s a real advantage of the Jimny. Has anyone heard of plastic variant bars for Jimnys? Are there any decent options for mounting a winch without a bull bar? Cheers, any comments welcome.

  5. Hey Kev,

    Cheers for sharing your experiences. You are right; there’s certainly an element of luck in whether you need a Bull Bar. We’ve yet to hit any big animals with ours, but I’m glad its there for other reasons along with the increased protection.

    I think if you hit something hard, or big its going to require major work regardless of a Bull Bar, but they can help

    All the best

  6. G’day Chris…
    I procrastinated for a year about installing a bull bar on my 2011 Landcruiser 200, eventually i did in 2018. In Toolern Vale Victoria a fringe rural area, some roads see on average 2 deceased kangaroos /week, around 2015 0r 2017 a 10km stretch of road between Toolern Vale and Gisborne had 10 kangaroos killed on it in about 9 days, i was stunned, i drove this road 4x per day every day so i knew it well and at night 70-80kmh. After fitting the bull bar in 2018 and within two years i hit two kangaroos, and wonder how all previous years i avoided close calls with help of a light bar, then fit bar and hit two, did i become complacent thinking bull bar security? don’t know. One roo was hit at around 80kmh, jump from path of oncoming car to front of my car, no bull bar or car damage but did shift bull bar up at left side, loosened bolts, realigned all good. 2019 i hit rear of a Toyota Kluger wagon, unfortunately it unexpectedly emergency stopped on multi lane road, i failed to stop in time with impact at about 20-30kmh, the damn bull bar pushed back just enough to touch my grill, the grill pushed back about 1-2cm and touched the plastic shroud that surrounds the automatic transmission cooler front right side, that damn plastic grill ever so slightly cracked one tube on the trans cooler that rendered the car not driveable (needed to preplace the two crush mounts the bar mounts to), bars are excellent against movable soft animal even a 100kg roo, no good against hard not so movable cars, poles, trees, embankments etc, now i’m looking to relocate the transmission cooler, one guy said just remove the plastic shroud around it and gain about 10cm clearance… i would install a bull (roo) bar if your considering travelling remote areas, you can mount a winch to self recover and will be mostly protected against animal impact, otherwise heavy and not necessary, regards.

  7. Hey Chris,

    Yep, that would certainly help, but a lot of people get them for other reasons, as per the post.

    We’ve just come back from 3 weeks in the Pilbara, and came awfully close a number of times, and that was daylight driving, and interestingly mainly on the gravel. I wouldn’t be without one, especially at the moment with the huge wait time for parts, but its worth considering for your own situation. I’d love to remove some weight too!

    All the best

  8. The big question is just how likely are you to hit a roo. I’ve been driving in the wilderness for the last 30 years and never hit one, though I came close a few times. Then again, I don’t claim that the km I’ve racked up are as high or as dangerous as if I did a round Australia trip. What we need are real statistics to evaluate whether it’s worth considering having no bull bar.