2013–2021 PEUGEOT 308

Typical onset: 40,000-80,000 mi

Symptoms: rattling noise on cold start, check engine light with cam/crank correlation codes, loss of power, complete engine failure if belt snaps

Fix: The wet timing belt disintegrates in contaminated oil, sending debris through the engine. Requires belt replacement plus oil system flush at minimum; often leads to cylinder head removal for valve/piston damage inspection. Budget 8-12 hours labor if caught early, 20+ hours if internal damage occurred. Many owners face full engine replacement.

Estimated cost: $1,800-3,500 for early catch, $5,000-8,000+ for engine damage or replacement

Typical onset: 50,000-100,000 mi

Symptoms: burning 1 quart per 1,000 miles or worse, blue smoke on startup, rough idle, misfires, fouled spark plugs

Fix: PureTech engines suffer from piston ring issues and direct injection carbon buildup. Minor cases need valve cleaning and frequent oil top-ups (2-4 hours for walnut blasting). Severe cases require piston ring replacement or cylinder head work to address valve stem seals. Many owners live with oil top-ups between changes.

Estimated cost: $400-800 for carbon cleaning, $2,500-4,000 for rings/head work

Typical onset: 60,000-100,000 mi

Symptoms: clunk when shifting from Park to Drive, vibration at idle, excessive engine movement visible under hood, resonance around 2,000 rpm

Fix: The upper transmission/engine mount fails from the three-cylinder's inherent imbalance. Straightforward replacement, 1.5-2.5 hours labor. Often replaced alongside the lower torque mount for complete fix.

Estimated cost: $300-600

Typical onset: 70,000-120,000 mi

Symptoms: transmission fluid spots under car, burnt transmission smell, harsh shifting when cold, slipping between gears

Fix: The external transmission oil cooler develops leaks at connections or through the core. Requires cooler replacement plus fluid flush. If neglected and fluid runs low, internal transmission damage occurs. Repair is 3-4 hours labor; replacement transmission is 8-12 hours if damaged.

Estimated cost: $500-900 for cooler, $2,500-4,500 for transmission replacement

Symptoms: headlight flickering or complete failure, dashboard warning lights, intermittent electrical issues, multiple systems losing power

Fix: The LED driver modules fail internally (not just bulbs), and the engine bay fuse box develops corrosion or burnt contacts from moisture intrusion. LED module replacement is 1-2 hours, fuse box is 2-3 hours. Peugeot parts pricing is steep for electronics.

Estimated cost: $600-1,200 per headlight module, $400-800 for fuse box

Typical onset: 80,000-130,000 mi

Symptoms: limp mode activation, lack of power above 3,000 rpm, check engine light with boost pressure codes P0299/P0234, turbo whistle or flutter

Fix: The electronic wastegate actuator fails or the vacuum lines crack. Actuator replacement is 3-4 hours; full turbo replacement if shaft play or compressor wheel damage is present adds to 6-8 hours. Many owners try actuator recalibration first via dealer software.

Estimated cost: $600-1,000 for actuator, $1,500-2,500 for turbo replacement