Spiders in Your Car: Webs, Recalls and How to Clear Them

Every US recall we could find that blames spider webs

Compiled by The Pest Control Brief from NHTSA Part 573 reports, acknowledgement letters and recall records, downloaded 2 November 2026.

The Suzuki is the one most people miss: same part, same failure, 19,249 cars. We searched NHTSA’s post-2010 recall file, 15,370 campaign numbers, for the word “spider” and discarded convertibles and brake parts. Three campaigns remained. The Toyota recall was not among them, because its public summary never mentions spiders; the web appears only in the chronology of Toyota’s Part 573 report, so other recalls could be hidden the same way.

What the filings add to the headlines

• The species is not in the filings. Mazda’s reports say “a certain type of spider”. The yellow sac identification came from a Mazda spokesman speaking to reporters in 2011.
• Mazda’s first fix did not hold, though it knew of no fires. A spring went into the vent line in production in February 2010 and was the 2011 remedy. Reports of cracked tanks on spring-equipped cars followed in November 2011 and September 2013. By December 2013 Mazda had confirmed 9 such cases, and it concluded that “a kind of spider could possibly intrude even with the expanding spring”. Software limiting tank pressure was what solved it.
• Dealers got a dedicated tool. The 2011 repair instructions list a “Spider Brush”, part number MAZ6BRUSH, pushed through the vent hoses to check for webs. Mazda told dealers fewer than 1 per cent of cars would need a new tank.
• Toyota called it unusual. Its report cites “the unusual nature of the incidents involving spider webs clogging the drain hose and low occurrence rate”, and press reports at the time put known cases at 35 warning lights and three accidental deployments. Toyota’s spokeswoman said webs were the only consistent cause in the cases it had investigated, which is not the same as every blockage.
• Suzuki’s vent line came back. A later recall, 18V-769, covering 21,063 Kizashis, says hoses with the spider filter or the original hose can clog with dust on unpaved roads or in dusty conditions, with the same tank risk.

Many recalled cars had no recorded fix at the last report

This is the reason the old recalls still matter to a used-car buyer in 2026. In the last quarterly report we could read for each campaign, close to half of the 2014 Mazda and Suzuki cars had no recorded remedy. Later repairs and scrapped cars will have changed those figures, so run the VIN at nhtsa.gov/recalls or call the NHTSA hotline on 1-888-327-4236. An airbag warning light on one of the Toyotas listed above is the symptom Toyota’s report describes first, so it deserves a dealer visit rather than a wait.

Why spiders pick cars, and what is still unknown

We found no published study of spiders in vehicles, so the honest answer is built from what the animals do elsewhere. Sac spiders hunt at night rather than trapping prey in a web, and by day hide in silken tubes or sacs. Penn State finds those retreats under windowsills and siding and in wall and ceiling corners, so a narrow, undisturbed hose or door seam is an easy match. That is our inference; nobody has tested it. Ohio State entomologist Susan Jones told the Christian Science Monitor in 2011 that the species likes “an undisturbed place” for winter shelter.

The gasoline story is disputed

Reuters quoted an analyst saying the spider likes the smell of gasoline, and that line still circulates as fact. Jones rejected it directly: “There’s nothing that would make a yellow sac spider be attracted to gasoline.” We found no experiment settling it either way. Note too that the Toyota part carries water, not fuel vapour, which fits a taste for small sheltered tubes at least as well as a taste for gasoline. That is also our inference.

Mirrors and door frames

Webs on the outside of a car are usually a different spider doing a different job. UC IPM describes orb weavers as feeding on insects that fly, fall or are blown into the web. Astrid Heiling’s 1999 study of a bridge orb weaver in Vienna found it abundant along lit footbridge handrails and concluded it “seems to have evolved a foraging behaviour that exploits the attraction of insects to artificial lights”. A car under a lot light offers something similar, though no one has measured mirrors. Our orb weaver guide covers the group.

How long a spider can live in a car

Nobody has measured it in a vehicle. Two lab figures bracket the question. Starved adult wolf spiders (Lycosa lenta) survived a mean of 208 days and southern house spiders (Filistata hibernalis) 276 days in Anderson’s 1974 study in Ecology, so an empty cabin will not quickly starve one. Heat is the opposing force: McLaren, Null and Quinn measured a dark sedan reaching 117 F on even their coolest test day, with about 80 per cent of the rise inside 30 minutes, and windows opened 1.5 inches made little difference. Survival through that heat is untested, so do not count on a hot day to do the job.

How to clear them without chemicals in the cabin

1. Empty the car in daylight. Take out mats, boxes, firewood, plants and anything stored for months. UC IPM says control by spraying is only temporary without housekeeping, and the same logic applies here.
2. Vacuum the spider and its web. UC IPM rates vacuuming as effective because soft bodies often do not survive the hose. Use the crevice tool on seat rails, door pockets, the seams of the boot and around the vents. Empty the canister outdoors.
3. Take out silk sacs too. Penn State says agrarian sac spiders lay in June or July in a silken retreat the female guards, and that C. mildei lays almost exclusively indoors, so summer clean-outs are worth doing thoroughly.
4. Brush or hose the outside. Mirror housings, door jambs and wheel arches can be cleared with a soft brush or low-pressure water. UC IPM recommends a broom or hose for webs outside a house.
5. Put sticky traps under the seats if sightings continue. UC IPM calls them a noninsecticidal option; keep them out of reach of children and pets.
6. Move the parking spot away from a bright light or dense hedge if webs return nightly, and ask your garage to check the cabin air filter at the next service.

If a spider drops into view while you are driving, pull over somewhere safe before dealing with it. For a problem at home as well, see how to get rid of spiders in the house.

Natural fixes, foggers and odour bombs: what the evidence says

Compiled by The Pest Control Brief from the named sources.

Are car spiders dangerous?

Rarely. UC IPM says yellow sac spiders usually bite when trapped against skin in clothing or bedding, and that pattern could apply to a sleeve or a seat. We know of no count of bites in cars. Penn State says most sac spider bites are painful at first but normally cause no serious condition, and Richard Vetter’s team found no necrosis in 20 verified bites in 2006. Our yellow sac spider guide has the full record. If you cannot name what you found, use our spider identification guide, and see a doctor about any bite that is getting worse.

Frequently asked questions

How to get rid of spiders in car?

Empty the car, then vacuum the spider and its web with a crevice tool, including seat rails, door pockets and around vents. UC IPM rates vacuuming as effective. Brush webs off mirrors, add sticky traps under seats if sightings continue, and clear out stored boxes. Do not use a fogger, since the National Pesticide Information Center says not to use them in most vehicles.

Why are there spiders in my car?

No published study has answered this directly. The likely reasons are shelter, insects near parking lights, and cargo such as boxes, plants or firewood. Sac spiders hide by day in silken retreats in tight, undisturbed places, which vent hoses and door seams resemble. The popular claim that they are drawn to gasoline is disputed: Ohio State entomologist Susan Jones rejected it in 2011.

Are spiders in cars common?

Nobody counts them, so there is no reliable rate. The recall files suggest blockages are uncommon: Toyota’s report describes a “low occurrence rate”, Mazda told dealers fewer than 1 per cent of cars would need a new tank, and 20 webs had been reported when 52,000 Mazda6 cars were recalled in 2011.

Can spiders live in cars?

Yes, at least for a time. NHTSA filings document webs inside vent lines and drain hoses, and Penn State says sac spiders make silk retreats in sheltered spots. Lab studies show some adult spiders survive more than 200 days without food. Cabin heat works against them, with a sedan reaching 117 F on a mild sunny day, but no one has measured how long a spider lasts in a vehicle.

Sources

• National Highway Traffic Safety Administration: recall records and acknowledgement letters for campaigns 11V-134, 13V-442, 14V-114, 14V-464 and 18V-769; flat recall file FLAT_RCL_POST_2010, downloaded 2 November 2026.
• Mazda North American Operations, Part 573 Defect Report, 14V-114, 11 March 2014; Safety and Emission Recall 6211B owner notice, repair instructions and dealer communication, 2011; quarterly report for 11V-134, fourth quarter 2011.
• Toyota Motor Engineering and Manufacturing North America, Part 573 Defect Information Report, 13V-442, 17 October 2013.
• Suzuki Motor of America, dealer notice for recall 18V-769 describing 14V-464.
• NHTSA Recall Quarterly Reports: 13V-442 (first quarter 2015), 14V-114 (third quarter 2015), 14V-464 (third quarter 2015).
• University of California Statewide IPM Program, Pest Notes: Spiders, UC ANR Publication 7442.
• Penn State Extension, Agrarian Sac Spider and Longlegged Sac Spider.
• Vetter, R. S., Isbister, G. K., Bush, S. P. and Boutin, L. J., Verified bites by yellow sac spiders (genus Cheiracanthium) in the United States and Australia: where is the necrosis? American Journal of Tropical Medicine and Hygiene 74(6), 2006.
• Heiling, A. M., Why do nocturnal orb-web spiders (Araneidae) search for light? Behavioral Ecology and Sociobiology 46: 43 to 49, 1999.
• Anderson, J. F., Responses to starvation in the spiders Lycosa lenta Hentz and Filistata hibernalis (Hentz). Ecology, 1974.
• McLaren, C., Null, J. and Quinn, J., Heat stress from enclosed vehicles: moderate ambient temperatures cause significant temperature rise in enclosed vehicles. Pediatrics 116(1), 2005.
• Fischer, A., Ayasse, M. and Andrade, M., Natural compounds as spider repellents: fact or myth? Journal of Economic Entomology 111(1): 314 to 318, 2018.
• National Pesticide Information Center, Foggers. Agency for Toxic Substances and Disease Registry, ToxFAQs and Toxicological Profile: Chlorine Dioxide and Chlorite.
• Christian Science Monitor, reports of 4 March 2011 (Mazda spokesman; Susan Jones of Ohio State University), 18 October 2013 (Toyota) and 5 April 2014 (Mazda, citing Reuters).