10 Dealer Add Ons Consumer Reports And Other Experts Say Buyers Should Think Twice About, And How Each One Can Quietly Inflate The Final Price

You have haggled for an hour, the monthly payment finally looks fair, and then the finance office slides over a page of extras. That is where a good deal can quietly turn into an expensive one.

Cars parked on a dealership lot waiting for buyers.

In a May 2026 Jalopnik report on Consumer Reports’ analysis, unnecessary dealer fees and add-ons “can easily add over $4,000 or more” to a car’s purchase price, before any financing charges. The same piece noted that federal regulators had earlier in the year warned 97 car dealerships to stop charging hidden fees.

Drawing on that report, a 2024 Cars.com explainer and a SlashGear guide to new car add-ons, here are 10 extras buyers should think twice about, and what each can do to the final price.

The pattern is the same across all of them. An item that sounds small on a monthly payment gets rolled into the loan, and you pay interest on it for years.

1. Extended Warranties, Which Often Carry Four-Figure Price Tags

Jalopnik calls extended warranties one of the most commonly pitched and most expensive add-ons, often carrying “multiple four-figure price tags.” It says they might make sense in rare cases, such as a pre-owned Range Rover, a brand with some of the industry’s highest repair costs.

Consumer Reports’ advice is to buy a more reliable vehicle in the first place and set money aside for repairs.

2. Rustproofing, Listed At $800

Consumer Reports, as reported by Jalopnik, puts rustproofing at $800 and says it is not worth it for modern new cars because they come protected from the factory. Cars.com agrees, calling it largely unnecessary given modern corrosion coatings, especially in mild winter climates.

3. Fabric And Interior Protection Plans

Consumer Reports gives the same reasoning for interior protection plans and suggests a $12 spray-on stain protector from Amazon instead. SlashGear says dealer fabric protection can run up to $195, while a spray protector costs under $20.

Cars.com adds that no treatment replaces regular cleaning.

4. VIN Etching At $200 To $300

Consumer Reports lists VIN etching at $200 to $300 and calls it unnecessary, since cars already have VINs marked at the factory. Cars.com says the idea has merit as an anti-theft step, but DIY kits cost less than $50, so there is no reason to pay dealer prices.

5. Nitrogen Tire Fill, Listed At $400

Consumer Reports puts nitrogen tire fill at $400 and says it is unnecessary because regular air is already mostly nitrogen. SlashGear says nitrogen typically costs $100 or more, notes that dry air is about 78% nitrogen, and points to Consumer Reports testing that found only a 1.3-psi advantage for nitrogen over a year.

Cars.com says a tire shop can add it more cheaply, and that the benefit is minimal outside track driving.

6. “Market Adjustments” That Add No Equipment

When demand for a new vehicle is high, Consumer Reports says dealers add markups to wring more cash out of customers. Cars.com describes a market adjustment as adding no equipment at all, just extra profit above the full manufacturer’s sticker price.

Its advice is to start negotiating from the automaker’s sticker, and if the dealer will not budge, going elsewhere may be the only way around it.

7. Wheel And Tire Warranties At $400 To $900

SlashGear says dealer premiums for these plans run about $400 to $900, and the chance of replacing wheels or tires because of pothole damage on a regular car is low. It does say the coverage can make sense for sports or luxury cars.

8. GAP Insurance Sold As A Flat Fee

SlashGear says dealer versions can cost several hundred dollars in flat fees, and cites Forbes Advisor’s estimate that GAP coverage costs roughly $61 a year through a car insurance provider. The guide suggests negotiating the dealer fee or shopping the coverage yourself.

9. Spoilers Priced From $350 To $1,000

SlashGear reports that dealers charge $350 to $1,000 for spoilers, and that price may not include installation. For the average driver, it says, there is “no measurable benefit” beyond looks.

10. Paint Protection Film And Sealants

SlashGear says paint protection film can cost “up to $8,000” for full-body coverage and suits buyers of very expensive cars. Cars.com notes it is hard to apply well, and suggests hiring a trusted installer after delivery because a poor installation can peel or damage the finish.

It adds that sealants wear off and need reapplication, and that regular washing and waxing usually suffice.

Not every line on the buyer’s order is a trap. Consumer Reports says some documentation fee can be justified, though “exorbitant” fees are a warning sign and the amount is negotiable, and titling and registration are valid if the dealer handles those tasks for you.

Cars.com also warns that dealer-installed options are “typically heavily marked up,” sometimes by 100% or more, so a dealer can still profit even when you pay half the listed price of an option.

The practical move is simple. Ask for an itemized, out-the-door price in writing before you sit in the finance office, circle anything you did not request, and say no politely and repeatedly. You can accept or decline warranties and insurance products after the vehicle price is agreed, so never feel pushed to decide on the spot.

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