# ChassisDex

> Will it fit? Sourced fitment answers for the Subaru WRX (GD) and Mazda Miata (NA/NB), with honest confidence tiers. Every claim cites public sources (linked on each page), carries a confidence tier (Confirmed / Reported / Limited) and a last-verified date. Summaries are in our own words. Fitment is not guaranteed; brakes, suspension, steering and restraints are safety-critical.

Data last updated: 2026-10-22. Coverage: 63 fitment answers, 26 known issues, 22 build entries, 66 sources.
Corrections: hello@chassisdex.com. Please cite the page URL when you use an answer.

Confidence tiers:
- Confirmed: manufacturer document, or two or more independent sources agree on a specific checkable fact.
- Reported: one reasonably reputable source (retailer, shop, magazine). Safety-critical parts are capped here unless a manufacturer document backs the claim.
- Limited: forum/anecdotal or partial detail; a lead to research, not an answer.

## Key pages
- [Home](https://chassisdex.com/): overview and popular questions
- [Subaru WRX (GD/GG, 2002-2007)](https://chassisdex.com/subaru-wrx/gd/): fitment table, known issues, mods by goal
- [Subaru WRX (GD/GG, 2002-2007) common problems](https://chassisdex.com/subaru-wrx/gd/common-problems/)
- [Mazda Miata NA (1990-1997)](https://chassisdex.com/mazda-miata/na/): fitment table, known issues, mods by goal
- [Mazda Miata NA (1990-1997) common problems](https://chassisdex.com/mazda-miata/na/common-problems/)
- [Mazda Miata NB (1999-2005 US model years)](https://chassisdex.com/mazda-miata/nb/): fitment table, known issues, mods by goal
- [Mazda Miata NB (1999-2005 US model years) common problems](https://chassisdex.com/mazda-miata/nb/common-problems/)
- [All parts](https://chassisdex.com/parts/)
- [All sources](https://chassisdex.com/sources/)
- [About the data](https://chassisdex.com/about-the-data/): sourcing rules and tiers
- [Disclaimer](https://chassisdex.com/disclaimer/)

## Subaru WRX (GD/GG, 2002-2007): fitment answers
- [What is the factory spec for the OEM 2002-2005 WRX wheel (16x6.5 +53) on a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-oem-wrx-wheel-16-fit/): Factory specification (Confirmed; verified 2026-10-15)
- [What is the factory spec for the OEM 2006-2007 WRX wheel (17x7 +55) on a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-oem-wrx-wheel-17-fit/): Factory specification (Confirmed; verified 2026-10-15)
- [Will 2004 STI wheel (17x7.5 +53, 5x100) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-2004-wheel-fit/): Yes (Confirmed; verified 2026-10-15)
- [Will 2005-2007 STI wheel (17x8 +53, 5x114.3) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-2005-wheel-fit/): No (Confirmed; verified 2026-10-15)
- [Will Aftermarket 5x100 / 56.1 mm wheels (BRZ/86-pattern) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-brz-pattern-wheels-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will 2004-2007 STI front Brembo calipers fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-brembo-front-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will 2004-2007 STI rear Brembo calipers fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-brembo-rear-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will DBA 2657 rear adapter rotor fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-dba-2657-rotor-fit/): Yes, reportedly (Limited; verified 2026-10-15)
- [Will Subaru Legacy GT brakes fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-legacy-gt-brakes-fit/): Yes, with extra parts or work (Limited; verified 2026-10-15)
- [Will Mishimoto top-mount intercooler kit fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-mishimoto-tmic-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will Torque Solution top-mount intercooler fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-torque-solution-tmic-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will Radium Engineering dual catch can kit fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-radium-catch-can-19-0299-fit/): Yes (Confirmed; verified 2026-10-15)
- [Will 2008+ STI top-mount intercooler (OEM) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-08-tmic-fit/): Yes, with extra parts or work (Limited; verified 2026-10-15)
- [Will EJ205-era turbocharger (TD04L family) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-ej205-turbo-fit/): Unclear (Limited; verified 2026-10-15)
- [Will WRX sedan 20 mm rear sway bar fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sedan-rear-sway-20mm-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will Factory skid plates from Impreza-based Outback Sport fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-outback-sport-skidplates-fit/): Unclear (Limited; verified 2026-10-15)
- [Will SKF VKMA 98115 timing belt kit (Subaru boxer DOHC) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-skf-vkma-98115-fit/): Unclear (Limited; verified 2026-10-15)
- [Will 2004-2007 US STI 6-speed manual transmission fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-6mt-trans-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-20)
- [Will STI R180 rear differential fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-r180-rear-diff-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will COBB Accessport V3 AP3-SUB-001 fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-cobb-ap3-sub-001-fit/): Yes (Confirmed; verified 2026-10-20)
- [Will COBB Accessport V3 AP3-SUB-002 fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-cobb-ap3-sub-002-fit/): Yes (Confirmed; verified 2026-10-20)
- [Will 2015-2021 WRX (VA) factory wheels fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-va-wrx-wheels-fit/): No (Confirmed; verified 2026-10-21)
- [Will 2008-2014 WRX (GH/GR/GV) factory wheels fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-gr-wrx-wheels-fit/): Yes, reportedly (Reported; verified 2026-10-21)
- [Will 2005-07 STI 5x114.3 hub conversion (front knuckles/hub units, rear hubs and bearings) fit a Subaru WRX (GD/GG, 2002-2007)?](https://chassisdex.com/subaru-wrx/gd/will-sti-0507-hub-conversion-fit/): Yes, with extra parts or work (Reported; verified 2026-10-22)

## Subaru WRX (GD/GG, 2002-2007): known problems
- [Cracked piston ring lands from detonation](https://chassisdex.com/subaru-wrx/gd/problems/ringland-failure/): severity High, 2002-2007 (reported most often on 2.5L EJ255) (Confirmed)
- [Rod-bearing wear on the 2.0L EJ205](https://chassisdex.com/subaru-wrx/gd/problems/ej205-rod-bearing-wear/): severity High, 2002-2005 (Confirmed)
- [Clogged oil-feed screens starving the turbo (P0011)](https://chassisdex.com/subaru-wrx/gd/problems/avcs-oil-screen-turbo-starvation/): severity High, 2002-2007 (EJ-powered) (Reported)
- [Timing belt is an interference-engine risk; 105k mi / 105 months](https://chassisdex.com/subaru-wrx/gd/problems/timing-belt-interval/): severity High, 2002-2007 (Reported)
- [Stock transmission/clutch is the fuse under extra power](https://chassisdex.com/subaru-wrx/gd/problems/drivetrain-weak-link/): severity Medium, 2002-2007 (Reported)
- [Worn synchros (3rd gear) and cold-shift shudder](https://chassisdex.com/subaru-wrx/gd/problems/worn-synchros-cold-shudder/): severity Low, 2002-2007 (Reported)
- [Free-flowing downpipe can run 2004-05 WRX lean on stock tune](https://chassisdex.com/subaru-wrx/gd/problems/exhaust-upgrade-lean-2004-05/): severity High, 2004-2005 (Reported)
- [Early clutch hydraulic durability (restrictor valve added 2003)](https://chassisdex.com/subaru-wrx/gd/problems/clutch-hydraulics-2002/): severity Low, 2002 (2003 revision) (Reported)
- [Ticking/clicking under load is usually normal](https://chassisdex.com/subaru-wrx/gd/problems/exhaust-ticking-is-normal/): severity Info, 2002-2007 (Reported)
- [Thin paint and thin sheet metal](https://chassisdex.com/subaru-wrx/gd/problems/thin-paint-and-panels/): severity Low, 2002-2007 (Reported)
- [Valve cover gasket oil leaks on the 2.5L EJ255](https://chassisdex.com/subaru-wrx/gd/problems/ej255-valve-cover-gasket-leaks/): severity Low, 2006-2007 (EJ255) (Limited)
- [Head gasket leaks and head lifting on the 2.5L turbo (2006-07)](https://chassisdex.com/subaru-wrx/gd/problems/ej25-head-gasket-leaks/): severity High, 2006-2007 WRX (EJ255) and 2004-07 STI (EJ257) (Limited)

## Subaru WRX (GD/GG, 2002-2007): mods by goal
- [Reliability](https://chassisdex.com/subaru-wrx/gd/best-mods/reliability/): Oil analysis and oil-pressure monitoring; Inspect/remove AVCS and turbo oil-feed screens; Have a professional tune when adding exhaust or boost parts; Install a catch can for crankcase ventilation; Replace timing belt, tensioner, idlers and water pump together
- [Cooling](https://chassisdex.com/subaru-wrx/gd/best-mods/cooling/): Top-mount intercooler upgrade
- [Wheels & tires](https://chassisdex.com/subaru-wrx/gd/best-mods/wheels-tires/): Better tires on wider wheels; Skid plates for rallycross/stage use
- [Suspension](https://chassisdex.com/subaru-wrx/gd/best-mods/suspension/): Larger rear bar, better shocks, camber bolts
- [Brakes](https://chassisdex.com/subaru-wrx/gd/best-mods/brakes/): STI Brembo brake swap
- [Drivetrain](https://chassisdex.com/subaru-wrx/gd/best-mods/drivetrain/): STI 6-speed swap
- [Power](https://chassisdex.com/subaru-wrx/gd/best-mods/power/): ECU reflash with a COBB Accessport

## Mazda Miata NA (1990-1997): fitment answers
- [Will NB 6-speed manual transmission (with NB shifter) fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-6speed-trans-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-15)
- [Will 1994-2005 differential, driveshaft and axles (7-inch rear) fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-diff-driveshaft-axles-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-15)
- [Will 1994-2005 flywheel with matching clutch disc and pressure plate fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-flywheel-clutch-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-15)
- [Will 1999-2000 (and base 2001-02) front calipers, brackets and rotors fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-front-brakes-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will NB factory wheels (4x100) fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-wheels-fit/): Yes (Confirmed; verified 2026-10-15)
- [Will NB factory hardtop fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-hardtop-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will NB convertible top frame / soft top assembly fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-softtop-frame-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will NB-era sway bars (with NB brackets and bushings) fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-sway-bars-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will NB complete shock/spring assemblies fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-shock-spring-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will 1999-2000 (NB1) ignition coil pack fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb1-coilpack-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will NB2 (2001-05) VVT 1.8L engine fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb2-vvt-engine-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will NB radiator fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-radiator-fit/): No (Reported; verified 2026-10-15)
- [Will NB seats (on NB seat rails) fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nb-seats-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will 15x7 +38 wheel with 205/50R15 tire fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-wheel-15x7-38-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will 15x9 +36 wheel with 225/45R15 tire fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-wheel-15x9-36-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will Tein Street Basis Z coilovers fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-tein-street-basis-z-fit/): Yes, reportedly (Limited; verified 2026-10-15)
- [What is the factory spec for the OEM NA wheel (14x5.5 or 15x6, +45) on a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-oem-na-wheel-fit/): Factory specification (Reported; verified 2026-10-15)
- [Will 15x8 +25 wheel (4x100) with 205/50R15 tire fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-wheel-15x8-25-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-21)
- [Will NC Miata (2006-2015) factory or NC-fitment wheels fit a Mazda Miata NA (1990-1997)?](https://chassisdex.com/mazda-miata/na/will-nc-miata-wheels-fit/): No (Confirmed; verified 2026-10-21)

## Mazda Miata NA (1990-1997): known problems
- [Short-nose crankshaft (1990 and early 1991)](https://chassisdex.com/mazda-miata/na/problems/short-nose-crankshaft/): severity High, 1990-early 1991 (1.6L) (Confirmed)
- [Rocker and floor rust from clogged drains](https://chassisdex.com/mazda-miata/na/problems/rust-and-clogged-drains/): severity Medium, 1990-1997 (Reported)
- [1990-93 1.6 uses a smaller 6-inch rear differential](https://chassisdex.com/mazda-miata/na/problems/weaker-1-6-differential/): severity Low, 1990-1993 (Reported)
- [Cooling parts crack with age and heat](https://chassisdex.com/mazda-miata/na/problems/cooling-hoses-reservoir-cracking/): severity Medium, 1990-1997 (and NB) (Limited)
- [Verify timing belt and plug service history](https://chassisdex.com/mazda-miata/na/problems/timing-belt-history/): severity Medium, 1990-1997 (Limited)
- [Oil leaks from the CAS O-ring and valve cover gasket](https://chassisdex.com/mazda-miata/na/problems/cas-o-ring-valve-cover-oil-leaks/): severity Low, 1990-1997 (all NA) (Confirmed)

## Mazda Miata NA (1990-1997): mods by goal
- [First steps](https://chassisdex.com/mazda-miata/na/best-mods/first-steps/): Start with tires, brake pads and driving time
- [Suspension](https://chassisdex.com/mazda-miata/na/best-mods/suspension/): Coilovers, sway bars and strut-tower brace
- [Wheels & tires](https://chassisdex.com/mazda-miata/na/best-mods/wheels-tires/): 15x7 +38 wheel and 205/50R15 tire
- [Drivetrain](https://chassisdex.com/mazda-miata/na/best-mods/drivetrain/): NB 6-speed into an NA; Limited-slip differential
- [Brakes](https://chassisdex.com/mazda-miata/na/best-mods/brakes/): Larger NB brakes on a 1990-93 NA
- [Power](https://chassisdex.com/mazda-miata/na/best-mods/power/): Forced induction and engine swaps

## Mazda Miata NB (1999-2005 US model years): fitment answers
- [What is the factory spec for the OEM NB wheel (14x6 or 15x6, +40) on a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-oem-nb-wheel-fit/): Factory specification (Reported; verified 2026-10-15)
- [Will 15x7 +38 wheel with 205/50R15 tire fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-wheel-15x7-38-fit/): Yes, reportedly (Reported; verified 2026-10-15)
- [Will 15x9 +36 wheel with 225/45R15 tire fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-wheel-15x9-36-fit/): Yes, with extra parts or work (Reported; verified 2026-10-15)
- [Will Tein Street Basis Z coilovers fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-tein-street-basis-z-fit/): Yes, reportedly (Limited; verified 2026-10-15)
- [Will NB2 "Sport" brake package (2001-02 LS/SE, all 2003-05) fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-sport-brakes-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will NB2 (2001-05) VVT 1.8L engine fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-vvt-engine-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will NB 6-speed manual transmission (with NB shifter) fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb-6speed-trans-fit/): Yes (Confirmed; verified 2026-10-20)
- [Will 2004-05 Mazdaspeed Miata Torsen differential with MSM axles fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-msm-torsen-axles-fit/): Yes, with extra parts or work (Confirmed; verified 2026-10-20)
- [Will 1994-2005 differential, driveshaft and axles (7-inch rear) fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb-diff-driveshaft-axles-fit/): Yes (Confirmed; verified 2026-10-20)
- [Will NB2 (2001-05) tubular exhaust manifold with EGR tube fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-exhaust-manifold-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will Mazdaspeed Miata BP5A intake camshaft fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-msm-bp5a-intake-cam-fit/): Yes, reportedly (Reported; verified 2026-10-20)
- [Will Mazdaspeed Miata sway bars (with MSM bushings and brackets) fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-msm-sway-bars-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will Mazdaspeed Miata 17x7 wheels fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-msm-wheels-17x7-fit/): Yes, reportedly (Reported; verified 2026-10-20)
- [Will NB2 / Mazdaspeed seats fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-seats-fit/): Yes, reportedly (Reported; verified 2026-10-20)
- [Will NB2 (2001-05) seatbelts with pyrotechnic pretensioners fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-seatbelts-fit/): No (Reported; verified 2026-10-20)
- [Will NB2 (2001-05) engine computer (ECU) fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-ecu-fit/): No (Reported; verified 2026-10-20)
- [Will NA (1990-97) factory hardtop fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-na-hardtop-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will NB2 front bumper and headlights fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nb2-front-bumper-headlights-fit/): Yes, with extra parts or work (Reported; verified 2026-10-20)
- [Will 15x8 +25 wheel (4x100) with 205/50R15 tire fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-wheel-15x8-25-fit/): Yes, reportedly (Reported; verified 2026-10-21)
- [Will NC Miata (2006-2015) factory or NC-fitment wheels fit a Mazda Miata NB (1999-2005 US model years)?](https://chassisdex.com/mazda-miata/nb/will-nc-miata-wheels-fit/): No (Confirmed; verified 2026-10-21)

## Mazda Miata NB (1999-2005 US model years): known problems
- [NB1 ignition coil packs wear out and can damage the cat](https://chassisdex.com/mazda-miata/nb/problems/nb1-coil-pack-failure/): severity Medium, 1999-2000 (NB1) (Reported)
- [Thrust-bearing failure in some 1999-2000 cars](https://chassisdex.com/mazda-miata/nb/problems/thrust-bearing-1999-2000/): severity Medium, 1999-2000 (Confirmed)
- [Clutch chatter in 2001 and some 2002 cars](https://chassisdex.com/mazda-miata/nb/problems/clutch-chatter-2001-2002/): severity Low, 2001-2002 (Reported)
- [Plastic radiator end tanks go brittle; airflow blockage](https://chassisdex.com/mazda-miata/nb/problems/radiator-end-tanks/): severity Medium, 1999-2005 (Reported)
- [Corroded coolant mixing-manifold elbow (NB1)](https://chassisdex.com/mazda-miata/nb/problems/coolant-mixing-manifold-elbow/): severity Medium, 1999-2000 (Limited)
- [Crank and cam position sensor problems](https://chassisdex.com/mazda-miata/nb/problems/crank-cam-sensor-problems/): severity Low, 1999-2005 (Reported)
- [Rust (front side members, East Coast cars)](https://chassisdex.com/mazda-miata/nb/problems/nb-rust/): severity Medium, 1999-2005 (Reported)
- [EGR codes and idle drop](https://chassisdex.com/mazda-miata/nb/problems/egr-and-idle-drop/): severity Low, 1999-2000 (listed) (Limited)

## Mazda Miata NB (1999-2005 US model years): mods by goal
- [First steps](https://chassisdex.com/mazda-miata/nb/best-mods/first-steps/): Start with tires, brake pads and driving time
- [Suspension](https://chassisdex.com/mazda-miata/nb/best-mods/suspension/): Coilovers, sway bars and strut-tower brace
- [Wheels & tires](https://chassisdex.com/mazda-miata/nb/best-mods/wheels-tires/): 15x7 +38 wheel and 205/50R15 tire
- [Drivetrain](https://chassisdex.com/mazda-miata/nb/best-mods/drivetrain/): Limited-slip differential; 6-speed and LSD swaps within the NB family
- [Cooling](https://chassisdex.com/mazda-miata/nb/best-mods/cooling/): All-aluminum radiator
- [Power](https://chassisdex.com/mazda-miata/nb/best-mods/power/): Forced induction and engine swaps
- [Brakes](https://chassisdex.com/mazda-miata/nb/best-mods/brakes/): NB2 Sport brakes on a 1999-2000 NB

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