Dear Güero & Bullseye: Real Car Questions From Real Owners

That sagging-in-back symptom is almost certainly a ruptured air spring, possibly along with a failing air compressor — it's a well-known weak point on that generation of air-sprung Navigator, so the diagnosis tracks. But the dealer's $2,000–$5,000 quote is pricing the expensive fix: brand-new OEM air struts, which fail again eventually because it's a wear part, not a permanent repair.

The fix most owners land on instead is an aftermarket coil-spring conversion kit — brands like Strutmasters and Arnott make them — which swaps the air struts for a conventional spring-and-shock setup for good. Parts run a few hundred dollars per corner, and having an independent suspension shop install all four usually comes in well under $1,500 total, sometimes under $1,000. Get a quote from an independent shop before deciding anything.

On the being-upside-down part: trading it in doesn't make that $5,000 disappear, it just gets rolled into whatever you finance next — usually the worse trade. If the conversion-kit route really is $800–$1,500 versus the dealer's $2,000–$5,000, fixing it is very likely cheaper than eating $5,000 of negative equity plus a new down payment. That flips only if the Navigator has other expensive problems stacking up.

Good news buried in a bad night: the battery that actually starts a 2007 Prius is the small 12V auxiliary battery, not the big hybrid traction battery — those are two entirely separate systems. A lot of people assume "Prius battery" automatically means the expensive one, but a 12V replacement is usually $100–$160 for the part, and most auto parts stores will install it for free if you buy it there. It's one of the cheaper repairs that car has.

The jump-pack workaround costs more in risk than the fix would in cash — you found that out directly when the pack itself was too depleted to start the car. A weak 12V also keeps draining faster over time and can eventually trip fault codes in the hybrid system if it drops too low, so this isn't just inconvenient, it's a slow path to a pricier problem.

One safety note: on the 2007 Prius the 12V lives in the trunk, but there's a jump-start terminal under the hood — a small red-capped post near the fuse box — specifically so you don't have to pop the trunk or touch the actual battery to get a jump.

The redesign isn't costing as much real value as it feels like it is. New vehicles lose a big chunk of value in year one regardless of styling changes — a redesign landing a few months later stings emotionally, but the actual resale hit from that alone is usually smaller than it feels, especially if the mechanicals didn't change. Get real numbers before assuming the worst: run it through a couple of instant-offer sites and a dealer trade quote or two and see what's actually on the table.

If you do sell, a private-party sale will close more of that $10,000 gap than a dealer trade-in — trade-ins are consistently the lowest offer you'll get.

The bigger thing worth naming: this negative equity partly happened because negative equity from the last vehicle got rolled into this one. Doing that again just moves the same hole into car number three, deeper each time. If you can stand to keep this one and put extra money toward principal for a year or two, the negative equity shrinks and eventually turns positive — the boring fix, but the real one. And if you finance again down the line, GAP coverage is what actually protects you from this exact spot if a car's ever totaled before the loan catches up.

Be honest with yourself about what this car actually is right now: not a nice-looking Camaro with some cosmetic issues, but a salvage sale. A car that's sat two months and won't start, with flood exposure that went uninsured, on top of hail damage, is priced by what it's worth in parts and drivetrain salvage, not by how good the ZL1 kit makes it look from across the lot. Flood damage specifically wrecks value hard — even once everything's dried out, water in the wiring harness, connectors, and computer modules causes corrosion and electrical failures that can show up months or years later, and anyone who actually knows cars will price around that risk. It's also a material fact you're legally required to disclose to a buyer in most states, unlike something cosmetic — selling it quietly as a good-looking Camaro without mentioning the flood is the kind of thing that comes back on you legally, not just as bad karma.

Get real numbers instead of guessing: quote it with a couple of junk/salvage-car buying services (Peddle, CarBrain, or a local salvage yard) — they specifically deal in non-running, flood, and hail-damaged vehicles and will give an actual cash offer. Depending on how far the water reached (interior carpet versus up into the engine and electronics) and whether the drivetrain survived, that's realistically low hundreds of dollars up to maybe $1,500–$2,000 for parts or rebuild value. Don't plan your next purchase around it landing higher than that.

For the next car on $3,000 cash and a tight monthly budget: the lesson from this one is the lesson to apply going forward. It looked good at a distance and was a mess up close — rattling kit, curb-rashed rims, and now flood and hail damage on top. At this budget, pick boring and reliable over flashy: an older Toyota Corolla or Camry, or a Honda Civic or Accord, with high but well-documented miles will cost far less in surprise repairs than another car bought for looks. Two rules worth keeping this time — pay cash, no loan, so you're not repeating the negative-equity spiral other letters in this column have hit, and get an independent mechanic's pre-purchase inspection (usually $100–150) before handing over money, so you're not the next person unknowingly buying somebody else's flood or hail car.

Smoke smell that's built up for years isn't an air-freshener problem — it's soaked into fabric, the headliner, carpet padding, and the HVAC system itself, so getting it out for real takes more than a spray. Cheapest first: deep clean or steam every fabric surface (seats, carpet, headliner, mats), and wipe every hard surface — dash, doors, vents, wheel — with a degreaser, since tar residue builds up on plastics and glass too. Replace the cabin air filter; it's been filtering smoke through the vents for years and it's cheap. Clean or replace the AC evaporator — this is the part people forget, and it's why the smell comes back even after everything else is spotless, since it gets blown through the vents every time the AC or heat runs.

If that's not enough, a mobile detailer's ozone treatment (commonly $75–$150) actually breaks down odor molecules instead of masking them, and it's considerably more effective than fabric sprays. Enzyme-based odor eliminators work better on carpet and seats than perfume-based ones. The headliner is usually the last holdout — cheap fabric, absorbs heavily, hard to deep-clean in place — so professional reupholstery or replacement is the last resort if the smell survives everything else.

Worth knowing if this ever goes to a dealer instead of a private sale: dealer trade appraisers are specifically trained to check for smoker vehicles — headliner staining, UV light on interior surfaces, and the vents themselves are a standard part of that inspection, and they'll mark the trade value down for it even after a real cleaning, since a smoker's own nose adjusts to a smell a fresh inspector won't miss. And if a private buyer asks directly whether it was smoked in, that's a different question than getting the smell out for real — worth answering honestly, since tar residue turning up later is the kind of thing that comes back on a seller.