Peugeot 308 1.6 T7 Reliability

Common Problems

Timing chain stretch and tensioner wear

€1,000 - 2,2001 of 6

Chain stretches over time, tensioner loses hydraulic pressure overnight causing cold-start rattle · more· less

The EP6C (non-turbo) shares the same timing chain design as the THP, though the problem is less severe on the naturally aspirated version due to lower operating stress. The tensioner's release valve weakens over time, allowing oil pressure to bleed off overnight. This produces a distinctive metallic rattle for a few seconds to up to 30 seconds on cold start. Typically appears between 80,000-120,000 km on the VTi (compared to 60,000-80,000 km on the THP). Peugeot revised the tensioner, chain guides, and chain itself over the production run, but early cars (2007-2010) are most susceptible. If ignored, the chain can skip teeth and cause valve-to-piston contact, destroying the engine. Replacement includes the chain, tensioner, guides, and sprockets, requiring 6-8 hours of labor. Independent specialist cost: around €1,000-1,500, Peugeot dealer: up to €2,200.

Thermostat housing and coolant leaks

€350 - 8002 of 6

Electronic thermostat fails around 70,000-80,000 km, plastic coolant pipes crack at connections · more· less

The EP6 uses an electronically controlled thermostat that commonly fails around 70,000-80,000 km. Additionally, the coolant temperature sensor is known to corrode internally, with coolant wicking up the cable via capillary action and eventually reaching the ECU, corroding its connections and causing random electrical faults. The plastic coolant pipe running from the thermostat to the water pump at the back of the engine is prone to cracking. Accessing the thermostat is labour-intensive as it requires removing the battery tray, air filter housing, and ECU. Peugeot released a redesigned thermostat unit with improved sensor wiring. Thermostat replacement costs €250-500, while a leaking coolant pipe adds another €100-300.

VVT solenoid and camshaft dephaser issues

€150 - 1,2003 of 6

Oil control solenoid gets contaminated, causing rough running and fault codes · more· less

The variable valve timing system relies on oil-pressure-driven camshaft dephasers controlled by solenoid valves. Over time, oil deposits accumulate on the solenoid, causing it to stick. Symptoms include rough idle, anti-pollution warning messages, and diagnostic codes P0013/P0014 for camshaft dephasing faults. Cleaning the solenoid with carb cleaner can provide a temporary fix, but the issue tends to return within a year. Solenoid replacement costs around €100-200 per unit. If the dephaser mechanism itself has seized, which is rarer on the VTi than the THP, costs rise to €600-1,200 including labor. Regular oil changes with the correct specification oil help prevent buildup.

Ignition coil and spark plug failures

€150 - 4004 of 6

Coil packs fail prematurely, causing misfires and anti-pollution warnings · more· less

The EP6 engine has a higher-than-average ignition coil failure rate. Symptoms include engine misfiring, juddering at idle, loss of power, and the depollution system faulty message on the dashboard. Fault codes P1336-P1340 (cylinder-specific misfires) are common. A set of four ignition coils costs around €80-150, spark plugs around €30-50 for a set, and labor is approximately one hour. Spark plugs should ideally be replaced every 20,000 km rather than the manufacturer's extended interval, as worn plugs accelerate coil wear. This is a nuisance issue rather than a catastrophic failure.

Excessive oil consumption (PCV design)

€50 - 5005 of 6

PCV system pulls oil vapor through the intake, consuming approximately 1 liter per 5,000 km · more· less

The EP6 engine's PCV breather design allows oil vapor to be sucked through the intake manifold, leading to elevated oil consumption that Peugeot considers within tolerance. Consumption of approximately 1 liter per 5,000 km is commonly reported. The PCV diaphragm and O-ring on the air intake connector to the cam cover can deteriorate, worsening the issue. Checking the diaphragm (accessible via a disc on the rocker cover) and replacing the O-ring can reduce consumption. In most cases, the cost is simply regular oil top-ups (€50-100/year). If consumption exceeds 1 liter per 2,000 km, worn piston rings may be the cause, but this is uncommon on the non-turbo VTi.

AL4 automatic gearbox faults (if equipped)

€400 - 1,5006 of 6

Solenoid valves fail, causing harsh shifts, limp mode, and loss of drive · more· less

If the car is fitted with the 4-speed AL4 automatic gearbox, be aware this is a well-known weak point across the PSA range. Common symptoms include rough shifting from 1st to 2nd gear, the gearbox entering limp mode (locked in 3rd gear), and in severe cases complete loss of drive when the car is warmed up. The electro-hydraulic solenoid valves are the usual culprit, with failures caused by degraded gearbox oil. Changing the gearbox oil and resetting the wear counter can significantly improve shift quality, despite PSA claiming the oil is sealed for life. A solenoid replacement costs around €400-600. A full rebuild of the AL4 valve body runs €800-1,500. Manual gearbox models avoid this issue entirely.

Less troublesome than the THP, but EP6 weaknesses remain

The 1.6 VTi is a significantly less problematic engine than its turbocharged THP sibling, avoiding the high-pressure fuel pump, turbo, and carbon buildup issues. However, it still shares the EP6 family's timing chain and cooling system weaknesses. Manual gearbox models are more reliable than those with the AL4 automatic. Regular oil changes every 10,000-15,000 km (not the extended intervals PSA originally recommended) and monitoring for cold-start rattle are essential. Cars with complete service history and owners who avoided only short trips tend to fare best.

Pre-Purchase Inspection Checklist

General checks

Service history
Complete records are essential. Verify oil was changed every 10,000-15,000 km maximum, not the extended intervals Peugeot originally recommended.
Tires
Check tread depth, age (date codes on sidewall), and uneven wear patterns.
Cold start
Must start the engine completely cold. Listen carefully for any sounds in the first 30 seconds after startup.
Test drive
Drive for at least 20 minutes including varied speeds. Check for smooth power delivery and gear changes.

Specific for this vehicle

Listen for timing chain rattle on cold start
Start the engine when completely cold and listen for a metallic rattle lasting 2-30 seconds. This indicates a worn chain tensioner. This is the most important single check on any EP6 engine.
Check coolant level and look for leaks at the back of the engine
Low coolant or dried residue around the thermostat area and water pump connections indicates leaking plastic pipes or a failing thermostat housing.
Check oil level between service marks
Very low oil suggests excessive PCV-related consumption. Ask the owner how often they top up. Some consumption is normal, but excessive use is a warning sign.

+ 3 more checksShow less

Test the automatic gearbox thoroughly (if equipped)
Drive for 15+ minutes until fully warmed up. Feel for harsh 1st-to-2nd shifts, hesitation, or loss of drive. Manual models avoid this issue.
Check for depollution system faulty warning
Drive the car and watch for the anti-pollution warning message. This commonly indicates failing ignition coils or VVT solenoid issues.
Verify all recall work has been completed
Contact Peugeot with the VIN. Particularly important: bonnet latch recall (2007 production) and lighting management recall (2007-2008 production).

Recalls and Technical Service Bulletins

Bonnet latch securing welds (Oct-Nov 2007 production) Verify completed

Lighting switch position detection error (May 2007-Mar 2008 production) Verify completed

Passenger brake pedal access cover (Dec 2009-Sep 2010 production) Verify completed

Fuel return pipe contact with filter bracket (various production dates) Verify completed

Takata airbag inflator (various production years) Verify completed

Contact Peugeot with the VIN to verify all recalls have been completed. Given the car's age, most recalls should have been addressed by now, but verify rather than assume. The Takata airbag recall is a global campaign still being completed on some vehicles.

Warranty Status

Factory warranty (2 years) Expired on all T7 models

Rust perforation warranty (12 years) Expired on all T7 models

Extended warranty availability Third-party warranties available, check exclusions

All Peugeot 308 T7 models are well outside their original 2-year factory warranty and 12-year rust perforation warranty. Third-party extended warranties are available but often exclude known problem areas like timing chains on the EP6 engine. Read exclusion clauses carefully before purchasing.

Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.

This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.

Peugeot 308 1.6 T7

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