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Car Modifications That Won’t Reduce Your Resale Value

Modified Cars Resale Value:

Car Mods That Won’t Reduce Resale Value

Think Twice Before Modifying Your Car

For many people, their car is their pride and joy; and rightly so! Cars are often an everyday-use necessity, especially considering the vastness of Australia, so you want something comfortable, reliable, something to be proud of. Occasionally, vehicle owners may feel so inclined as to modify their pride and joy to make it that extra bit special or unique. They might want to put their own personal touch on it, add a mod-con that the original spec. doesn’t include, improve performance or fuel efficiency or just simply make it stand out from the crowd.

It is unfortunate that we must also report that many of said modders are often shocked to find that the resale value of their modified car is much less than their expectations, having spent thousands of dollars ‘upgrading’ it, and that the value was merely perceived – sentimental. Many don’t realise at the time of making the modifications that they are most likely very user-specific, i.e. the flames they had painted down the side of their Commodore VS, although very appealing to them, have reduced the value of the car by probably 30% or more. Now we’re not suggesting that the flames don’t look cool – beauty is in the eye of the beholder after all – but it’s very hard to sell a car that has a custom paint job, as everyone’s tastes are different.

It’s also worth mentioning that modifying a car can, in some cases, make a car worth much, much more. There are companies who rely on this – Alpina and Masonary for example – and make some incredible cars, modified way beyond what the manufacturer intended. Cars modified to race are often worth more, or some extreme engine and chassis modifications will occasionally make a modified car’s resale value soar. It’s probably also worth mentioning that, more often than not, these cars have had tens, if not hundreds of thousands of dollars spent on them – usually much more than they are being sold for, which brings us full circle.

Mods Are Subjective

It’s important to remember that the mods you make to your car are very likely to be for your own benefit – your Subaru Impreza didn’t come with a turbo as standard, so you spent $5,000 having one fitted. It’s way faster now, that’s for sure! It’s also worth much less because it’s no longer standard – it’s been ‘tinkered’ with in a way that affects the car on numerous levels. When the time comes to sell, people will question its mechanical integrity, because you’ve strapped on a part that the car wasn’t designed to have (Impreza fans will no doubt argue that case, but this is merely an example). Is it safe? Will it last? Has the car been thrashed within an inch of is life?!

In short: by modifying your car, you are narrowing your audience when it comes to selling it on. The more significant the modifications, the narrower your audience becomes. We have put together a list of mods you can make without harming the resale value of your pride and joy. First, some modifications that will certainly reduce the value of your car:

Modified Subaru Impreza - Modified Car Resale Value

Mods That WILL Reduce Your Car’s Value

It’s easy to get carried away modding your vehicle, especially if it becomes a hobby, but proceed with caution. These mods, some more obvious than others, will reduce the value of your car, in some cases significantly, and you need to be aware of that before you mod:

  • Aftermarket turbos & superchargers
  • Nitrous Oxide systems
  • Suspension modifications (more below)
  • Custom paint / wraps
  • Body kits
  • Race upgrades (bucket seats, harness belts, steering wheel replacement – especially removing the airbag, slick tyres)
  • Loud exhausts (don’t even think about fire-spitting exhausts!)
  • Illegal modifications (vary by region / state)

Don’t get us wrong, we’re all for modifying cars, and when done well, with a lot of money spent and a touch of class and style, modified cars can look awesome. But, as we said previously, beauty is very much in the eye of the beholder, and there are not many people who are willing to spend tens, if not hundreds of thousands on a heavily modified car, no matter how well done, powerful or stunning it is.


Modifications That WILL NOT Affect The Value Of Your Car

With the more brash, over the top modifications out of the way, we’ll move on to the more subtle, tasteful mods that, while maybe not adding to the value of your car, shouldn’t reduce the value. This is of course to be taken with a pinch of salt, and we won’t be held in any way accountable for any loss of value from performing these mods. Generally speaking, the below listed modifications are a safe bet, and can be carried out without too much worry. We advise always buying parts from your vehicle’s manufacturer that were designed for your specific vehicle where possible, and to have any work carried out by skilled professionals for the best results and least possible risk.

If it wasn’t already clear, we must add a disclaimer to say that while we suggest these changes to your vehicle won’t affect the sale price, we cannot in any way guarantee it. Cars in stock factory condition are almost always worth more than those with aftermarket extras.


Xenon Headlights - Modified Car Resale Value

‘Xenon’ / LED / Laser Headlights

These extra-bright, often-blueish headlights will increase your visibility on the roads and cut through fog better than standard bulbs. Not only do they make it easier for you to see further down the road and give a wider peripheral, they also make you more visible to oncoming traffic and pedestrians. While extra bright headlights are standard in many new cars, a lot of the previous generation did not have these and would benefit from the upgrade. They also look pretty cool and can be fitted by anyone! Here’s a comparison so you can see which is best for you.

Sound system

Now let’s get this clear: we’re not suggesting you add extra speakers and sub-woofers; those things will surely come with negative connotations and likely reduce the value of your car.

Upgrading the standard speakers – the ones tucked inside the door panels (usually) – can give a better sound quality and, as they’re hidden, likely won’t affect the value of your car. It is also possible to upgrade the main head unit (that’s the thing with the twisty knobs and buttons on it to adjust the radio) without it affecting the value. Don’t buy a crappy aftermarket stereo with a built in DVD player – no one needs that in their car – but instead select a high-quality unit that specifically fits your vehicle. It is an idea to choose a head unit that was made by the manufacturer of your vehicle to ensure the value isn’t affected, although as long as you don’t install anything outrageous or fit it badly, you should be okay. Have a professional do this for you.

Allow Wheels - Modified Car Resale Value

Alloy Wheels

If your car didn’t come with alloy wheels as standard, our best suggestion is to buy wheels produced by the manufacturer of your vehicle to enhance the look of your car. Be careful here because alloys wheels, if chosen badly, can look really awful. If you must put over-sized wheels with low profile tyres on your car, make sure you at least keep the originals, so you can swap them back when it comes to selling. If you decide to buy a set of second-hand wheels, we suggest you get them refurbished to look like new.

Leather Seats

While some may argue leather seats are a bad idea in the Australian heat, there’s no denying they are a sign of luxury. It is fair to assume that most cars don’t have leather seats, many should never be fitted with leather seats, but if your car needs that extra luxury touch, a full set of new seats might be a good way to go – it might even add a little more value to your car.

We must emphasise that you replace all the seats, not just the driver’s seat or front seats – all the seats. Make sure the seats are in good condition and have them fitted by a professional – if in doubt, just don’t do it; or go for a standard upholstered seat as opposed to leather.

Raised Suspension - Modified Car Resale Value


For Utes and 4x4s, upgraded suspension can often increase the modified car’s resale value. That being said, a modified four-wheel-drive has probably been modified for a reason, leading to questions of its past life, and what kind of a beating it’s taken. If you plan on modifying your off-road vehicle, make sure you know what you’re buying, get brand-new, high quality parts and have them fitted by a professional mechanic. You don’t want a shock absorber to fail on the beach 30km from civilisation.

In the case of cars, suspension mods are usually not a good thing. To the right buyer, it will be whole heartedly welcomed, but to many, lowering the suspension of a car is a bad sign. This comes down to the perceived ‘tinkering’ of integral parts, which very rarely gives buyers a good feeling. It’s best to stick with the stock suspension kit.

Paint Jobs

As mentioned at the start of this article, painting your car can be a very bad idea if you want to sell it for anywhere near market value. That said, if you’re painting for the right reasons, it won’t affect the value – or at least only in a positive way. It goes without saying that you should only ever have a professional paint your car, don’t try that at home!

If you’re having the car painted to refurbish the body work and/or have blemishes tidied up, then go right ahead. Be warned though that painting a car is expensive, time consuming, and will certainly not add the value to the car that you paid for the paint.

Having a car wrapped may look great – often does – but with a standard wrap lasting only a few years (3-5 usually) it begs questions of how much will It cost to remove? Is it going to start fading and peeling a few months after someone buys it from you? What is the body work below like?

Window Tints

Tinted windows are very popular in Australia as they help keep out the extreme heat, as well as help to block out the blinding sun. Done right, this modification will certainly have no negative effect on the value of your car. Done badly, and you can expect to receive a lighter wallet than you’d hoped on sale day. Make sure to have a professional do it and make sure they’re done to a legal tint (a professional will advise you of this and shouldn’t be willing to go any further), you don’t want it to be dangerously dark at night.

Goodyear Tyres - Modified Car Resale Value


While not technically a ‘mod’, upgrading the tyres on your vehicle can be a wise investment. Often when people sell their car and need to replace the tyres (either for a roadworthy or just because they were dangerously bald) they will go for the cheapest option possible to reduce the amount they have to spend on a car they’re just going to sell anyway. Good quality tyres are always a good investment. They are the only thing connecting you to the road – do you really want to cheap out on that?
For standard cars, high quality, brand-name tyres such as Goodyear or Pirelli (amongst others) that are suitable for all conditions (obligatory mention of fast-changing weather conditions in Australia) are your best bet. 4x4s and Utes are often more desirable with all-terrain tyres. While full off-road, knobbly mud tyres may be desirable to some, they can be hideously loud on roads, wear down much faster and are usually very expensive. That said, a quality set of B.F. Goodrich A/Ts will be ideal for any 4×4. Don’t forget to replace the spare tyre as well! You’ll be glad of it if you get a flat.

Mod With Care

While modding cars can be a lot of fun, and we certainly aren’t against it, just make sure you know what you’re getting yourself in for. Expect a lower return when it comes to selling your vehicle, it’s a fact of car sales that mods are perceived as being red flags to buyers, so be prepared. If in doubt, keep it simple, or don’t mod at all.

The main things you should take from this article are:

If you’re going to mod your car and don’t want to lose its resale value:

  • Don’t buy cheap parts / accessories. The savings you make up front will cost you down the line
  • Keep the original parts you changed (unless they’re broken of course). That way you can revert to original before selling – just make sure it’s reverted properly, and you don’t alter anything that could be potentially dangerous to the new owner
  • Don’t make any changes that can’t be undone, or that can’t be undone easily (see above point)

The best thing you can do to your car to maintain its value is simply look after it. Keep up with regular maintenance, change the fluids regularly and keep it clean. Respect your car and it will respect you!

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Frequently Asked Questions

Can you sell a car with personalised plates?
While personalised plates are technically a car modification, they are much easier to remove for the new buyer than many other potential car mods. With just a simple transfer form, you can remove the personalised plates that you paid so much for, and assign them to a new car. Otherwise, the personalised plates will stay on the car even after transferring ownership.
Should I mod my car?
The question of modifying your car depends totally on what aspect of the car you plan to modify. You should exercise caution when modifying your car for several reasons. The answer to this question depends largely on whether or not you are willing to undo all of the hard work when eventually preparing for sale. You must also be willing to work hard on keeping up regular maintenance alongside your modifications.
How do car mods affect insurance?
Car modifications may affect your car insurance policy in ways you don’t realise. By modifying your car, your insurance policy may become more expensive. The value of your vehicle and its accessories increases as a total, also making it more of a theft and accident risk. Make sure you keep this in mind before deciding to modify your insured vehicle.