Exeter Auto Loan put together this glossary of 48 terms because borrowing for a car cost means reading two kinds of paperwork at once: a personal loan agreement and a repair estimate, insurance bill or dealer buyer's order. Each definition below is written in plain English with typical US figures where they help, and each term has its own anchor so it can be linked from guides across the site.
What the Exeter Auto Loan glossary covers
The Exeter Auto Loan glossary defines 48 personal-loan and car-cost terms, from APR and amortization to deductibles, tread depth and vehicle history reports, arranged A–Z in eight letter groups for quick scanning.
Roughly half of the terms describe borrowing: how a personal loan is priced, checked, signed and repaid. The other half describe the car costs people most often finance, including repairs, insurance, tires and brakes, and used-car purchases. Every Exeter car loan offer you might receive uses this same vocabulary. Figures such as repair price ranges and APRs are estimates based on typical US market conditions; your own quote and offer will differ. For deeper reading, the guide to personal loan rates for car costs and the overview of common eligibility requirements build on many of these definitions.
A–B terms
A–B terms cover how a personal loan is priced and repaid, such as APR, amortization and autopay, plus car-side words like wheel alignment, brake rotors and a dealer's buyer's order.
Alignment
A wheel alignment adjusts the angles of the wheels so they point straight and sit evenly on the road. A standard four-wheel alignment typically costs about $100 to $200 at US shops. Skipping it after new tires or suspension work can wear the new tread unevenly within a few thousand miles.
Amortization
Amortization is the schedule that splits each fixed monthly payment between interest and principal over the loan term. Early payments carry more interest, and later payments go mostly toward principal. An amortization table shows the remaining balance after every payment.
Annual percentage rate (APR)
The annual percentage rate, or APR, is the yearly cost of borrowing expressed as a percentage, including the interest rate and most required fees such as an origination fee. Personal loan APRs typically run from about 6% to 35.99% depending on credit, income, state and lender. Comparing APRs is the fairest way to compare two offers side by side.
Autopay
Autopay is an arrangement that lets a lender withdraw your monthly payment from your checking account automatically on the due date. It helps prevent missed payments and late fees. Some lenders offer a small APR discount, often around 0.25 to 0.50 percentage points, for enrolling.
Brake rotor
A brake rotor is the metal disc the brake pads clamp against to slow each wheel. Rotors wear thinner over time and can warp, causing a pulsing pedal or grinding noise. Replacing pads and rotors on one axle commonly costs about $300 to $700, as an estimate.
Buyer's order
A buyer's order is the dealer document that itemizes a vehicle's price, taxes, title and registration fees, add-ons and the down payment required. It is the number to use when working out how much, if anything, you need to borrow for a down payment. Review it line by line before signing any financing paperwork.
C terms
C terms explain credit and insurance basics: how a charge-off happens, what a co-borrower takes on, the difference between collision and comprehensive coverage, and how credit reports and scores relate.
Charge-off
A charge-off happens when a lender writes off a loan as unlikely to be collected, usually after about 120 to 180 days of missed payments. The debt is still owed and may be sold to a collection agency. A charge-off can stay on a credit report for seven years and lower a score significantly.
Co-borrower
A co-borrower applies for a loan jointly with you and shares full legal responsibility for repaying it. Adding a co-borrower with stronger credit or income can improve the chance of an offer or lower the APR. The loan and its payment history appear on both people's credit reports.
Collision coverage
Collision coverage is the part of an auto policy that pays to repair or replace your own car after a crash with another vehicle or object, regardless of fault. It applies after you pay your deductible. Lenders on financed cars usually require it.
Comprehensive coverage
Comprehensive coverage pays for damage to your car from events other than a collision, such as theft, hail, flooding, fire, vandalism or hitting an animal. A deductible applies to each claim. Catalytic converter theft is a common recent comprehensive claim.
Credit report
A credit report is the record kept by a credit bureau of your accounts, balances, payment history, inquiries and public records. Lenders review it to judge how you have handled debt. You can request free reports from each of the three national bureaus and dispute errors you find.
Credit score
A credit score is a three-digit number, usually from 300 to 850, that summarizes the information in a credit report. Payment history and amounts owed carry the most weight. Higher scores generally qualify for lower personal loan APRs.

D terms
D terms describe the numbers lenders and insurers weigh most, including debt-to-income ratio and deductibles, along with what default means, how diagnostic fees work and how a down payment affects a car purchase.
Debt-to-income ratio
Debt-to-income ratio, or DTI, is your total monthly debt payments divided by your gross monthly income. A driver earning $4,000 a month with $1,200 in payments has a DTI of 30%. Many personal loan lenders prefer a DTI below about 40% to 45%, including the new payment.
Deductible
A deductible is the amount you pay toward an insurance claim before the insurer pays the rest. With a $1,000 deductible and $3,800 of covered damage, you pay $1,000 and the insurer pays $2,800. Choosing a higher deductible usually lowers your premium but raises your out-of-pocket cost after a claim.
Default
Default is the failure to repay a loan as agreed, typically declared after several consecutive missed payments. It can lead to collection activity, added fees and serious credit damage. Contacting the lender early about a hardship is usually far better than letting an account slide into default.
Diagnostic fee
A diagnostic fee is what a shop charges to find the cause of a problem, such as a warning light or strange noise. It commonly runs about $100 to $200, often equal to one hour of labor. Many shops credit it toward the repair if you approve the work.
Direct deposit
Direct deposit is the electronic transfer of loan funds straight into your checking account. Most personal loan lenders fund this way, often the next business day after approval. Your bank's posting schedule can add a short delay.
Down payment
A down payment is the cash you pay upfront when buying a car, which reduces the amount financed. A larger down payment lowers the auto loan balance, the monthly payment and the risk of owing more than the car is worth. Dealers and auto lenders often set a minimum, such as $1,000 or 10% of the price.
F–I terms
F–I terms cover how interest is set and checked: fixed rates, hard credit inquiries, installment loans and interest rates, plus gap insurance, which protects drivers who owe more than a car is worth.
Fixed rate
A fixed rate is an interest rate that stays the same for the entire loan term. Most personal loans carry fixed rates, so the monthly payment never changes. Fixed payments make budgeting for a repair or insurance loan predictable.
Gap insurance
Gap insurance covers the difference between what you owe on an auto loan and the car's actual cash value if it is totaled or stolen. It matters most when a down payment was small or the loan term is long. It is sold by insurers, dealers and some auto lenders.
Hard inquiry
A hard inquiry is a credit check a lender makes when you formally apply for credit. It can lower a credit score by a few points for several months and stays on a report for two years. Lenders may run one before final approval of a personal loan.
Installment loan
An installment loan is borrowed as a lump sum and repaid in equal scheduled payments over a set term. Personal loans and auto loans are both installment loans. Unlike a credit card, the balance does not revolve, so the loan ends on a known date.
Interest rate
The interest rate is the percentage a lender charges on the outstanding principal, not counting most fees. It is usually lower than the APR on the same loan when fees apply. Always compare APRs rather than interest rates when weighing offers.
L–M terms
L–M terms explain insurance gaps and late charges, liability coverage, the loan agreement, how a loan-matching service differs from a lender, and how loan term and monthly payment are connected.
Lapse in coverage
A lapse in coverage is any period when your car is registered but not insured, often caused by a missed premium payment. Driving uninsured is illegal in almost every state and can bring fines or license suspension. A lapse can also raise future premiums.
Late fee
A late fee is a charge a lender adds when a payment arrives after the due date or grace period. Personal loan late fees commonly run about $15 to $40 or a small percentage of the payment. Repeated late payments can also be reported to credit bureaus.
Liability coverage
Liability coverage pays for injuries and property damage you cause to others in a crash. Nearly every state requires a minimum amount. It does not pay to repair your own car, which is what collision coverage is for.
Loan agreement
A loan agreement is the binding contract between you and a lender that sets out the amount, APR, fees, payment schedule and your rights and obligations. Nothing is final until you sign it. Read the first due date, the total repayment amount and any prepayment terms before signing.
Loan-matching service
A loan-matching service collects one request and shares it with a network of lenders that may make offers. It does not lend money, approve loans or set rates. Exeter Auto Loan works this way, and it is free for borrowers to use.
Loan term
The loan term is the length of time you have to repay a loan, usually stated in months. Personal loan terms commonly run from 6 to 60 months. Longer terms lower the monthly payment but increase the total interest paid.
Monthly payment
The monthly payment is the fixed amount due each month, covering interest and part of the principal. As an estimate, $2,000 borrowed for 24 months at 24.99% APR is about $106.73 a month. Your payment depends on the amount, APR and term you accept.
N–P terms
N–P terms cover negative equity, OEM parts, origination fees and premiums, along with prepayment penalties, principal and the proof of income lenders ask for when verifying a personal loan request.
Negative equity
Negative equity means you owe more on a car loan than the car is worth, sometimes called being upside down. It often happens with small down payments, long terms or fast depreciation. Rolling negative equity into a new auto loan makes the problem larger.
OEM parts
OEM parts are made by the original equipment manufacturer, the same company that supplied parts for your car at the factory. They usually cost more than aftermarket parts but match the original fit exactly. Some insurers specify OEM or aftermarket parts in collision repairs.
Origination fee
An origination fee is a one-time charge some lenders take for processing a loan, often 1% to 10% of the amount. It is usually deducted from the funds you receive, so a $1,500 loan with a 5% fee would deposit about $1,425. The fee is included in the APR.
Premium
A premium is the price you pay for an insurance policy, billed monthly, every six months or annually. Many insurers discount the total for paying in full. Driving record, location, vehicle and coverage choices all affect the premium.
Prepayment penalty
A prepayment penalty is a fee some lenders charge if you pay off a loan early. Many personal loan lenders do not charge one, which lets you save interest by paying ahead. The loan agreement states whether a penalty applies.
Principal
Principal is the amount you borrowed, or the portion of it still unpaid, not counting interest or fees. Each payment reduces principal by the part not used for interest. Extra payments applied to principal shorten the loan and cut total interest.
Proof of income
Proof of income is documentation showing what you earn, such as recent pay stubs, bank statements, benefit letters or tax returns. Lenders use it to confirm you can afford the payment. Self-employed and gig workers often need two or three months of statements.
R–S terms
R–S terms explain recurring car costs like registration renewal and roadside assistance, how to read a repair estimate, the difference between secured and unsecured borrowing, and what a soft credit inquiry means.
Registration renewal
Registration renewal is the periodic fee paid to your state motor vehicle agency to keep a car legally on the road. Costs vary widely by state, from under $50 to several hundred dollars when based on vehicle value. Some states require an emissions or safety inspection before renewal.
Repair estimate
A repair estimate is a written quote listing the parts, labor hours, labor rate, shop fees and taxes for a job. Many states require shops to get your approval before exceeding it by a set amount. Getting a second estimate on bills above about $1,000 is a sensible habit.
Roadside assistance
Roadside assistance is a service that helps with breakdowns, such as towing, jump starts, flat-tire changes, lockouts and fuel delivery. It comes through auto clubs, insurance add-ons, credit cards or new-car warranties. Without coverage, a local tow often costs about $75 to $150 plus mileage.
Secured loan
A secured loan is backed by collateral, such as a savings account or a vehicle, that the lender can claim if you do not repay. Secured loans may carry lower APRs but put the collateral at risk. An auto loan is secured by the car it buys.
Soft inquiry
A soft inquiry is a credit check that does not affect your credit score, such as checking your own credit or a lender reviewing a request before a formal application. Submitting a request through a matching service typically involves a soft inquiry. Only you can see soft inquiries on your report.
T–V terms
T–V terms cover the total cost of borrowing, the federal Truth in Lending disclosure, unsecured and variable-rate loans, tire tread depth and the vehicle history report used when shopping for a used car.
Total repayment amount
The total repayment amount is everything you will pay over the life of a loan, including principal, interest and financed fees. As an estimate, $2,000 over 24 months at 24.99% APR adds up to about $2,561.59. Seeing this figure in dollars shows the true cost of financing a car expense.
Tread depth
Tread depth is the height of a tire's grooves, measured in 32nds of an inch. New tires usually start around 10/32 to 11/32, and many states consider 2/32 the legal minimum. Wet-road grip drops noticeably below about 4/32.
Truth in Lending disclosure
A Truth in Lending disclosure is the federally required summary of a loan's APR, finance charge, amount financed and total of payments. Lenders must provide it before you become obligated. It is the best single page for comparing offers.
Unsecured loan
An unsecured loan is granted based on your credit and income without collateral. Most personal loans for car costs are unsecured, so the car is not at risk if you fall behind, though credit damage and collection can follow. Unsecured loans usually carry higher APRs than secured ones.
Variable rate
A variable rate is an interest rate that can change over the loan term as a benchmark rate moves. Payments may rise or fall as a result. Most personal loans use fixed rates, while credit cards and some lines of credit are variable.
Vehicle history report
A vehicle history report summarizes a used car's past from its vehicle identification number, including reported accidents, title brands, odometer readings and ownership changes. It helps you spot salvage titles or rolled-back mileage before paying a down payment. It does not replace a pre-purchase inspection by a mechanic.
How to use this Exeter Auto Loan glossary
Use the Exeter Auto Loan glossary as a reference while you read an offer, an estimate or an insurance bill: look up any unfamiliar word, check the typical figures, then compare them with the numbers in front of you.
A few practical ways drivers put these definitions to work:
- Before requesting a personal loan: read APR, origination fee, loan term and total repayment amount together. Those four terms describe almost everything that determines what a loan really costs.
- When an offer arrives: find the Truth in Lending disclosure and check for a prepayment penalty. Confirm the first due date in the loan agreement lines up with your paycheck.
- At the repair shop: ask for a written repair estimate, ask whether the diagnostic fee will be credited, and ask whether quoted parts are OEM or aftermarket.
- After an accident: check whether collision or comprehensive coverage applies and what your deductible is, so you know exactly how much an Exeter loan request would need to cover.
- When buying a used car: pull a vehicle history report, read the buyer's order closely and think about negative equity before stretching for a small down payment.
If a term you need is missing, the support team at [email protected] welcomes suggestions, and the frequently asked questions page answers broader questions about the matching process. You can also run your own scenarios with the car-expense loan calculator to see how APR and loan term change a monthly payment. Understanding the vocabulary does not make a personal loan cheaper by itself, but it makes it much harder for a surprise fee or an unclear term to slip past you, which is the point of every Exeter loan comparison.
