Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 RLX Sport Hybrid.
Classified as a passenger car, the 2018 Acura RLX Sport Hybrid utilizes an Automatic (S10) transmission to achieve EPA fuel economy ratings of 20/29/23 mpg. Within the 2014-2019 model history, this specific year records the highest volume of owner feedback with three total complaints, with the engine identified as the top complaint area despite zero recalls. Researchers should note that while the complaint count is numerically low, it exceeds the model's lowest recorded year of 2014 which saw only one issue. This positioning marks the 2018 model as the peak for reported concerns within the covered timeline, indicating that engine-related data warrants specific attention when evaluating this model year.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 24F · 550 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic (S10) |
| Overall length | 197.6 in |
| Overall width | 74.8 in |
| Overall height | 57.5 in |
| Wheelbase | 112.2 in |
| Curb weight | 4354 lb |
| Track (front / rear) | 64.2 / 64.2 in |
| Weight distribution (front / rear) | 57/43 |
| EPA city / highway / combined | 20 / 29 / 23 mpg |
| Drivetrain | Front-Wheel Drive |
| Passenger volume | 102 cu ft |
| Cargo volume | 15 cu ft |
| Recommended fuel | Premium Gasoline |
Capacities, torques and tune-up values from the factory service manual.
Torque lug nuts to 94 ft-lbs. The firing order is 1-4-2-5-3-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
| Crankshaft Position (CKP) Sensor Bolt(s) | 9.0 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 3.0 ft-lbs |
| Crankshaft Position (CKP) Sensor Bolt(s) | 9.0 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 3.0 ft-lbs |
| Camshaft Sprocket and/or Gear Bolt(s) | 68.0 ft-lbs |
| Camshaft Sprocket and/or Gear Bolt(s) | 68.0 ft-lbs |
| Engine Coolant Temperature (ECT) Sensor Bolt(s) | 9.0 ft-lbs |
| Oxygen (O2S) Sensor Bolt(s) | 33.0 ft-lbs |
| Lug Nuts | 94 ft-lbs |
| Cylinder Firing Order | 1-4-2-5-3-6 |
| Curb Idle Speed (No Load) | 680 rpm |
| Curb Idle Speed Variance (No Load) | 50 rpm |
| Curb Idle Speed (No Load) | 950 rpm |
| Curb Idle Speed Variance (No Load) | 50 rpm |
| Spark Plug Manufacturer | Acura |
| Spark Plug Gap | 3471cc and 3474cc Engines: |
| Spark Plug Torque | 16 ft-lbs |
| Refrigerant | R134a |
| Refrigerant Capacity | .959-1.069 lbs. |
| Oil Capacity | 4.75 oz |
| Standard BCI Group Number | 24F |
| Standard BCI Cranking Performance | 550 cca |
| Fuel Pump Pressure Minimum | 60.0 psi |
| Fuel Pump Pressure Maximum | 68.0 psi |
| Regulated Fuel System Pressure (With Vacuum) | 60.0 |
| Brake Caliper Bolt to Carrier Torque | Front: 36; Rear: 26 /; Front: 37; Rear: 26 |
| Brake Caliper Carrier to Hub Bolt Torque | Front: 101; Rear: 80 |
| Brake Caliper Bolt to Carrier Torque | Front: 53; Rear: 26 |
| Brake Caliper Carrier to Hub Bolt Torque | Front: 101; Rear: 80 |
| Vented Rotor Minimum Thickness for Replacement | Front: .906; Rear: .315 |
| Variation from Parallelism Thickness Variation | .0006 |
| Maximum Rotor Runout | .0016 |
| Vented Rotor Minimum Thickness for Replacement | Front: 1.024; Rear: .315 |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 90 degrees | 90 degrees |
| 1 | 89.0 ft. lbs., Step 2: 90 degrees. Only if you are using a new pulley bolt or crankshaft, tighten the bolt in the following steps: Step 1: 52.0 ft. lbs., Step 2: 90 degrees, Step 3: loosen bolt, Step 4: 89.0 ft. lbs., Step 5: 90 | 89 ft. lbs |
| 1 | 22 ft. lbs. | 22 ft. lbs |
| 2 | Turn 90 degrees | 90 degrees |
| 3 | Turn 90 degrees | 90 degrees |
| 4 | New bolts turn an additional 90 degrees. | 90 degrees |
Prep Bearing cap bolts:
| 1 | 30.0 ft. lbs. | 30 ft. lbs |
| 2 | 47 degrees; Side cap bolts: 36.0 ft. lbs. | 47 degrees |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 2018 Acura RLX Sport Hybrid recorded three complaints, zero recalls, two investigations, and 13 technical service bulletins, according to the federal record. Compared with 2016, complaints rose from two to three while recalls remained at zero and investigations fell from three to two, and TSBs dropped sharply from 42 to 13. Relative to the earlier 2014 model year, 2018 shows a marked decline in complaints (from one to three is still low), recalls (from two to zero), investigations (from three to two), and especially TSBs (from 63 to 13). The subsequent 2019 year saw complaints fall to zero, recalls rise to two, investigations stay at two, and TSBs increase slightly to 14, indicating that the 2018 year sits in a phase of improving reliability after the higher‑volume 2014 period. Given the absence of recalls, lower investigation and TSB counts, and a complaint trend that does not worsen relative to prior years, the 2018 model year represents a reasonable choice for a used purchase.
All 3 complaints on record, top 3 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
Showing 5 of 13 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| ONLA8E20220830 | 2022-08-25 | Engine And Engine Cooling | Owner notification - Our records indicate that a Emissions Recall has not been completed… |
| ONLA8E11022020 | 2020-11-02 | Power Train | Owner Notification Letter - When the powertrain control module (PCM) detects a… |
| B14-025 | 2020-09-18 | Engine And Engine Cooling | Service Bulletin - The timing belt area chirps after the engine warms up. |
| B20-040 | 2020-09-15 | Power Train | "Service Bulletin - When the PCM detects a malfunction in one of the odd number… |
| BBOM09152020 | 2020-09-15 | Power Train | Dealer Message - Today, September 15, 2020, Acura is announcing a stop sale and emissions… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 20 city / 29 highway / 23 combined mpg.