The 325d slots between the 320d and 330d as a higher-output version of the same 2.0-litre four-cylinder diesel. It delivers near-six-cylinder performance with four-cylinder economy and was popular with company car buyers and long-distance commuters. Pre-2015 cars use the N47D20D engine; the 2015 LCI onwards switched to the improved B47.
Strong torque from 2.0L four-cylinder
Good fuel economy for its power
N47 timing chain risk (pre-2015)
EGR cooler recall affects many cars
Buy if: You want a quick diesel cruiser and can find a post-2015 LCI model with B47 engine and full service history.
Avoid if: You are looking at a pre-2015 N47 engine car without confirmed timing chain replacement or mostly do short urban trips.
Expected Annual Maintenance Costs
Common Problems
Rear-mounted chain stretches, tensioner loses pressure causing cold start rattle · more· less
The N47D20D engine (2013-2015 325d) has the timing chain at the rear of the engine, between the block and the gearbox. The tensioner release valve weakens over time, allowing oil pressure to bleed off overnight. This causes a distinctive metallic rattle for 1-30 seconds on cold start. Typically occurs between 60,000-120,000 km. BMW progressively revised the chain and tensioner through 2013-2015, and late-production N47 units are significantly less prone than 2007-2011 versions. However, the risk remains. Replacement requires engine removal, costing €1,200-1,800 at a specialist or €1,800-2,500 at a BMW dealer. If ignored, the chain can skip or snap, destroying the engine. The 2015+ B47 engine largely resolved this with a front-mounted chain. Always verify service history for chain replacement on pre-2015 cars.
EGR cooler leaks coolant internally, risk of intake damage and fire in severe cases · more· less
BMW issued a major recall (2018, expanded 2021) affecting over 1.6 million diesel vehicles including the F30 325d with N47 engine. The EGR cooler can develop internal coolant leaks. When coolant mixes with diesel soot, it creates hard deposits that can damage the intake manifold, and in rare cases increase fire risk. BMW has acknowledged that the initial 2018 recall fix was inadequate, leading to a revised repair in 2021. Symptoms include rough running at low rpm, coolant loss without visible external leak, and white exhaust smoke. EGR valve replacement costs €400-600 at an independent shop. A full EGR cooler and valve replacement runs €600-800. Always verify this recall has been completed with the latest repair before purchase.
Factory pre-grease dries out causing knock, or electric motor fails causing loss of power assist · more· less
Two types of failure affect the F30 electric steering rack. The first is a knocking noise when turning the steering wheel with the engine off, caused by factory grease drying out. BMW offers a repair kit (part 32106891974, approximately €40-60) that fixes this acoustic issue. The second, more serious failure involves the electric motor control unit failing, causing a 'power steering assist malfunction' warning and partial or total loss of power steering. This can occur as early as 49,000 km. Full steering rack replacement costs €1,500-2,000 fitted. Cars produced before January 2013 may also experience steering vibration between 60-130 km/h requiring a new EPS unit.
Diesel particulate filter clogs when car is used mainly for short urban journeys · more· less
The DPF needs regular highway runs at sustained speed to regenerate by burning off accumulated soot. Cars driven mainly in urban traffic or for trips under 20 minutes prevent the system from completing regeneration cycles. BMW's system automatically raises exhaust temperature to clear the DPF, but this requires at least 20-30 minutes of driving above 60 km/h with a minimum of 10 litres of fuel. Symptoms include loss of power, increased fuel consumption, and a dashboard warning. Professional DPF cleaning costs €150-200. Full DPF replacement costs €800-2,500 depending on whether aftermarket or OEM parts are used. Prevention: drive at 2,000+ rpm for 20-30 minutes regularly.
Intake manifold swirl flaps clog with carbon or their actuator linkage wears, causing limp mode · more· less
The swirl flaps in the intake manifold are designed to optimise airflow at low engine speeds. Over time, they become coated with carbon deposits from the EGR system and crankcase breather. The carbon buildup restricts their movement, and in some cases the actuator linkage wears and moves beyond its intended range, triggering limp mode. If a flap breaks apart, debris can enter the combustion chamber and cause serious engine damage. Preventive swirl flap removal or blanking costs €50-150 and eliminates the risk entirely with no noticeable performance change. If engine damage has occurred from ingested debris, repair costs can reach €1,500+. Many high-mileage owners proactively remove the flaps.
Wastegate actuator sticks from soot buildup, causing loss of boost and limp mode · more· less
The turbocharger wastegate actuator can stick due to soot and carbon buildup, particularly on cars driven gently or only for short trips. The 325d runs higher boost than the 320d from the same engine, which can accelerate wear on turbo components. Symptoms include EPC warning light, intermittent power loss, and limp mode. The actuator alone can be repaired at a specialist for €500-700. If the turbo internals are damaged (worn bearings, oil starvation), a full turbo replacement costs €1,200-2,500. Prevention: use quality oil, change it every 10,000 km rather than relying on BMW's longer service intervals, and allow the turbo to cool before switching off after spirited driving.
Gasket between oil filter housing and engine degrades, causing external oil leak · more· less
The gasket between the oil filter housing and the engine block degrades with heat cycling over time, losing elasticity and causing an oil leak. This is one of the most common oil leak locations on all BMW four-cylinder engines. The leak is usually visible as oil stains or drips around the oil filter area. If left unattended, oil can drip onto hot exhaust components. Parts cost €30-80 (gasket and O-rings), but labour is 2-3 hours due to accessibility. Total repair: €300-450 at an independent shop, €450-600 at a BMW dealer.
Reliable when maintained, but timing chain needs attention on pre-2015 cars
The 325d shares its engine with the more common 320d, meaning issues are well-documented and parts are widely available. The most significant concern is the N47 timing chain on pre-2015 models. Post-2015 B47 engines are substantially more reliable. EGR recall status should always be verified. With regular servicing at correct intervals and occasional longer drives, the 325d can deliver dependable high-mileage ownership.
Recalls and Technical Service Bulletins
EGR cooler internal leak and fire risk (2013-2018 diesel models, initial recall 2018, revised 2021)
Critical - verify latest repair completed
Takata airbag inflator replacement (various production dates)
Verify completed
Head airbag inflator weld joint crack (2014 model year)
Verify completed
The EGR cooler recall is the most critical. BMW issued an initial fix in 2018 which was later found to be inadequate. A revised repair was issued in 2021 under campaign 2021-711. Contact BMW with the VIN to verify the latest version of the repair has been performed.
Warranty Status
Factory warranty (2 years, no km limit)
Expired on all used 325d F30 models
Extended warranty
Available through BMW dealers or third-party providers
Rust perforation warranty (12 years)
May still apply on 2014+ models
All BMW 325d F30 models are outside their original 2-year factory warranty. BMW offered a 2+1 year warranty from November 2016 onwards, meaning some late 2016-2018 cars may have had 3 years. Check eligibility for BMW extended warranty programmes.
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.