Chrysler 300 LX
Weaknesses, engine ratings and buying advice
The first-generation Chrysler 300 on the LX platform was a minor sensation in 2005: a big, confident rear-drive sedan with gangster-flavored styling at an affordable price — and beneath the sheet metal sat Mercedes DNA from the DaimlerChrysler era. The rear axle, transmission and various components came from contemporary E-Class hardware, giving the 300 a solid chassis and a robustness you wouldn't expect from a Chrysler at this price point. Positioned as luxury for the masses, it's now a cheap, characterful youngtimer.
For the variants that matter here, it's all about the Hemi V8. The 5.7L Hemi with 375 hp delivers that classic American idle rumble and plenty of shove, but shares the known weak spot of all MDS Hemis: cylinder deactivation runs the lifters dry under light load, and when they collapse the camshaft is toast. Add the HEMI tick, shearing exhaust-manifold bolts, elevated oil consumption, and the costly 16-plug tune-up. The bigger 6.4L Hemi (392) with 485 hp and a forged steel crank is the enthusiast's dream, but it shares the MDS and manifold-bolt issues and drinks oil. On both: check the MDS history and listen for lifter noise.
Age shows on the LX in seals and plastics. The power-steering pump tends to leak, the oil-cooler O-ring seeps, and window regulators fail from broken cables. Typical of the early build years are cracking interior door handles made of brittle plastic and failing HVAC blend-door actuators that announce themselves with clicking behind the dash. None are engine-killers, but they add up and should be priced in at purchase.
Bottom line: the 300 LX is an honest, characterful V8 cruiser with a surprisingly solid Mercedes underpinning. It's cheap to buy but not a worry-free car: the Hemi MDS issue is the central risk, while the seal and plastic gripes are small stuff in aggregate. Find a well-maintained LX with documented engine history and you get one of the most stylish affordable sedans of the era.
Generations
Engine Overview
The Chrysler 300 LX is available with 4 engine variants — from 340 to 470 hp.
392 cubic inches, 4.09-inch bore, 485 hp — the biggest factory NA V8 of the 2020s. Forged steel crankshaft where the 5.7 uses cast iron — the real upgrade. Powder metal rods, cracked-cap design. Pistons are hypereutectic, not forged — ring lands too thin for boost, supercharger kits crack them. Same MDS lifter failure on automatics — engine replacement $15,000. Manual 392s skip MDS. VVT and active intake give 45 lb-ft more than the old 6.1 SRT. On 0W-40 at 5k intervals, the rotating assembly outlasts the car.
- !! MDS roller lifter / camshaft failure (cylinder deactivation) from 95,000 km
MDS cylinder deactivation restricts oil flow to the roller lifters. The needle bearings seize, the roller drags across the hardened cam lobe, destroys it and circulates metal debris through the oil. Frequently ends in total engine loss.
Symptoms: Rhythmic metallic tick (louder when warm/hot restart), cylinder misfire (P0300/P0302), power loss at low rpm, metal filings on the oil filter screen or VCT solenoid. - !! Piston / ringland failure under forced induction (modified only) from 30,000 km
The stock cast pistons are considered a 'time bomb' under boost. Above roughly 6 psi or when running lean, ringlands/pistons crack. Stock cars are unaffected — only aftermarket supercharged 392 builds.
Symptoms: Knock/ping under full load, sudden power loss, cylinder misfire, smoke, compression loss after high boost or a lean condition. - !! High oil consumption (track and break-in use) from 13,000 km
The 6.4 uses a lot of oil during break-in and track use — sometimes over a quart per 1,200 miles. Repeated high-rpm downshifting worsens it. Checking the oil level before track days is important.
Symptoms: Dropping oil level between changes, blue smoke on load changes, low-oil warning, oil-fouled spark plugs. If ignored, oil starvation can cause bearing damage.
+ 3 more engine weaknesses + vehicle weaknesses
5.7L Hemi V8, cast iron block, pushrod two-valve — 375 hp and that unmistakable idle burble. MDS deactivates cylinders 1, 4, 6, 7 under light throttle — deactivated lifters run dry on cam lobes, metal debris destroys the camshaft. Class action: Petro v. FCA. Manual cars skip MDS entirely — no deactivation hardware, no lifter lottery. That is THE buying tip. Software delete via DiabloSport/HP Tuners: $400-650, prevents activation but lifters stay, voids warranty, costs 2-4 MPG. On 0W-40 at 5,000 mile intervals, the bottom end is solid.
- !! MDS lifter collapse and camshaft destruction from 172,000 km
The cylinder deactivation (MDS) starves individual lifters of oil at idle, and the undersized needle bearings fail. The lifter grinds into the camshaft, sending metal shavings through the engine up to total failure.
Symptoms: Ticking or tapping that rises with RPM, cylinder misfires (P0300/P0305), stumbling and power loss under acceleration, rough idle. Can progress to engine failure with little warning. - !! HEMI tick (valvetrain ticking) from 130,000 km
The famous HEMI tick from the valvetrain: early roller-bearing or lifter noise. Often harmless, but it can be the precursor to lifter/camshaft failure and should be monitored.
Symptoms: Metallic, rhythmic ticking that varies with engine speed, audible at idle and when warm. Unlike a manifold leak, it persists once the engine is hot. - !! Excessive oil consumption from 160,000 km
Many 5.7 HEMIs burn significant oil past 100,000 miles, sometimes over 1 quart per 1,000 miles. Causes include piston-ring and valve-stem-seal wear plus a clogged PCV/CCV breather.
Symptoms: Dropping oil level without visible leaks, low-oil warning, bluish smoke under acceleration, oil-fouled spark plugs.
+ 3 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Power Steering Pump Leak Hydraulic power steering pump leaks through worn seals, hoses, or fittings. Low fluid makes steering heavy and damages the pump further. Pump replacement $300-1,200. Symptoms: Steering fluid puddle under vehicle, heavy steering at low level, whining when turning from 130,000 km | Medium |
Top Reported Issues
Alternatives
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Known Problems and Issues +
A total of 17 weaknesses have been documented for the Chrysler 300 LX (2005–2010) — 12 engine-related and 5 vehicle-related. Typical issues affect Steering, Interior, HVAC, Cooling.
300 (Hemi-5.7-LC, 2005–2010) — Be Careful: MDS lifter collapse and camshaft destruction, HEMI tick (valvetrain ticking), Excessive oil consumption. Power: 340 PS.
300 (Hemi-6.4-LC, 2005–2010) — Be Careful: MDS roller lifter / camshaft failure (cylinder deactivation), Piston / ringland failure under forced induction (modified only), High oil consumption (track and break-in use). Power: 431 PS.
What to watch out for with the Chrysler 300? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
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Last updated: February 2026 · All information without guarantee