2014 Acura RLX — Full Specifications
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The 2014 Acura RLX is a saloon/sedan powered by a 3.5L 6-cyl premium gasoline engine. Its most fuel-efficient configuration returns around 28 mpg (UK) / 23 mpg (US EPA) combined, with 28–36 mpg (UK) across all configurations. A hybrid version is also listed by EPA (3.5L 6-cyl), returning around 36 mpg (UK) combined. Owners often keep a Acura RLX workshop manual to hand for servicing and repairs.
Full Specifications
| Engine | 3.5L 6-cyl |
|---|---|
| Transmission | Automatic (S6) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Saloon/Sedan |
| Length | 4982 mm |
| Width | 1890 mm |
| Height | 1465 mm |
| Passenger Volume (EPA) | 102 cu ft (2,888 L) |
| Luggage Volume (EPA) | 15 cu ft (425 L) |
| Fuel Economy (UK) | 28 combined / 24 urban / 36 extra-urban mpg |
| Fuel Economy (US EPA) | 23 combined / 20 city / 30 highway mpg |
| CO₂ Emissions | 236 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,550 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2014 Acura RLX, all with the 3.5L 6-cyl engine. Combined fuel economy ranges from 23 to 30 mpg (US), or 28 to 36 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.5L 6-cyl | Automatic (S6) | Front-Wheel Drive | 28 | 23 (20/30) | 236 | $3,550 |
| 3.5L 6-cyl (Hybrid) | Automatic (S7) | All-Wheel Drive | 36 | 30 (28/31) | 188 | $2,750 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 102 cubic feet (about 2,888 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2014 Acura RLX
Running Costs: 2014 Acura RLX
Covering around 8,000 miles a year in a 2014 Acura RLX at 28 mpg combined, expect roughly 1,299 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,550 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2014 Acura RLX Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 5 safety recall campaigns that include the 2014 Acura RLX (as of 6 October 2026). Most affected areas: Fuel system (1), Forward collision avoidance (1), Exterior lighting (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Fuel system — campaign 23V858000, reported 18 December 2023. Risk: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.
- Forward collision avoidance — campaign 15V301000, reported 20 May 2015. Risk: If the CMBS unexpectedly applies emergency braking force while driving, there is an increased risk of a crash.
- Exterior lighting — campaign 14V792000, reported 16 December 2014. Risk: Delamination of the aluminum film may diminish output of the headlight, increasing the risk of a vehicle crash.
- Seat belts — campaign 14V639000, reported 10 October 2014. Risk: A seatbelt that does not function increases the risk of injury in a crash.
Showing the 4 most recent of 5 campaigns.
Owners have filed 85 complaints with NHTSA about the 2014 Acura RLX. The most-reported areas are Steering (49), Suspension (17), Electronic stability control (esc) (12). Complaints include 1 reported crash.
Used-buyer checklist for the 2014 Acura RLX
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Steering (49 owner complaints) — Check for play, noise or heavy steering, and ask whether any steering recall work was done.
- Suspension (17 owner complaints) — Listen for knocks over bumps and check tyre wear for signs of alignment problems.
- Stability control (12 owner complaints) — Make sure no stability or traction warning light stays on.
- Electrical system (11 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
At 28 mpg (UK) combined it sits close to the 29 mpg average for Acura models in our database.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2014 Acura RLX
Frequently Asked Questions
What engine does the 2014 Acura RLX have?
It's fitted with a 3.5L 6-cyl premium gasoline engine, paired with a automatic (s6) transmission.
What is the fuel economy of the 2014 Acura RLX?
The most efficient configuration returns around 28 mpg (UK) combined, or 23 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 28 to 36 mpg. The hybrid version returns around 36 mpg (UK) combined.
How much does the 2014 Acura RLX cost to fuel per year?
The US EPA estimates about $3,550 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2014 Acura RLX have any recalls?
NHTSA lists 5 safety recall campaigns that include the 2014 Acura RLX (as of 6 October 2026). Most affected areas: Fuel system (1), Forward collision avoidance (1), Exterior lighting (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2014 Acura RLX?
Among the 85 owner complaints filed with NHTSA, the most-reported areas are Steering (49 complaints), Suspension (17 complaints), Electronic stability control (esc) (12 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2014 Acura RLX have?
EPA measures interior passenger volume at 102 cubic feet (about 2,888 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.