1991 TOYOTA MR2

Typical onset: 80,000-150,000 mi

Symptoms: White smoke from exhaust on cold start, Coolant consumption without visible leaks, Milky oil or oil in coolant reservoir, Overheating under boost

Fix: Factory head gasket design is marginal under boost and heat cycles. Requires head removal, resurface, ARP studs, and MLS gasket upgrade. 12-16 hours labor due to mid-engine access constraints. Replace timing belt, water pump, and all coolant hoses while apart.

Estimated cost: $2,200-3,800

Typical onset: 60,000-120,000 mi

Symptoms: Rear end feels vague or darty in transitions, Sudden loss of rear grip mid-corner when lifting throttle, Clunking over bumps from rear suspension, Visible cracking in rear trailing arm bushings

Fix: Original rubber trailing arm and lateral link bushings deteriorate and cause dangerous mid-corner instability. Replace all rear bushings with polyurethane or OEM Toyota units. Add '93+ rear sway bar if missing. 4-6 hours labor plus alignment.

Estimated cost: $800-1,400

Typical onset: 70,000-140,000 mi

Symptoms: Sudden loss of all gears while driving, Grinding or popping noise from trans before failure, Gear oil leaking from bell housing area, Cannot select any gear with engine running

Fix: Early E153 transmissions used undersized snap rings that pop out of groove, allowing differential to walk. Trans must come out (8-10 hours in mid-engine bay), be torn down, snap ring upgraded, and bearings inspected. Many opt for used '92+ trans swap instead.

Estimated cost: $1,800-3,200

Typical onset: 90,000-180,000 mi

Symptoms: Oil residue on underside of engine bay panels, Burning oil smell after spirited driving, Oil drips on driveway after sitting, Low oil level between changes

Fix: Valve cover gaskets harden and leak onto exhaust manifold. Cam seals seep oil down timing cover. Rear main seal leaks into bellhousing. Valve cover is 2-3 hours, cam seals add 4-5 (timing belt off), rear main is 8-10 (trans out). Address all at once if trans is already coming out.

Estimated cost: $400-800 (valve cover alone), $1,500-2,400 (all seals with trans out)

Typical onset: 80,000-140,000 mi

Symptoms: Coolant puddle under engine after hard driving, Rapid overheating with coolant loss, Hissing sound from turbo area under boost, Steam from engine bay

Fix: Rubber coolant lines feeding turbo CHRA become brittle from heat cycles and burst. Difficult to access without removing turbo. Upgrade to braided stainless lines. 4-6 hours labor, replace all turbo coolant and oil feed/return lines together.

Estimated cost: $600-1,200

Typical onset: 100,000-160,000 mi

Symptoms: Hesitation or stumble under wide-open throttle, Lean AFR spikes on turbo cars, Hard starting when hot, Loss of power above 5,000 RPM

Fix: In-tank fuel pump weakens, fuel filter under passenger floor clogs. Tanks often have rust sediment by now. Drop tank (4-5 hours), replace pump, sender, and filter. Inspect tank interior for rust scale. Turbo cars especially sensitive to fuel starvation.

Estimated cost: $500-900

Typical onset: 70,000-130,000 mi

Symptoms: Clunking when shifting or launching, Excessive engine movement visible from cabin, Vibration at idle, smooth at higher RPM, Shifter feels notchy or misaligned

Fix: Rubber mounts deteriorate and allow driveline to shift under load. Replace all three engine mounts and trans mount. Right-hand mount is tight to access. 3-4 hours labor. OEM Toyota mounts preferred over aftermarket.

Estimated cost: $400-700